Rubber hardness conversion chart

Rubber hardness conversion chart

5 63. The methods cover the hardness range from 10 IRHD to 100 IRHD. This practice is based on: (1) The fact that durometer is generally called out in specifications with a tolerance of ±5 (i. The displacement / IRHD degrees conversion table is published in ISO 48 : 1994. The full load is applied for 10 to 15 seconds for iron or steel and at least 30 Rubber hardness scales. When it comes to measuring Shore A, typical rubber seals fall within a specific range: The Shore Durometer Scale is a standardized way of quantifying the hardness of a material, usually rubber or plastic. View our durometer chart for the rubber hardness required by your application. The lower the number (or farther to the left) on the durometer scale, the “softer The Durometer or Shore durometer is typically used as a standard for measuring the hardness of non-metallic materials such as Polymer, Rubber, Elastomer. Metallic materials, conversion of hardness values. Shore hardness refers to the reading of the value measured by a Shore hardness tester. * Values based on Brinell 10mm Standard Ball (3000kgf). The standard test specimens are platens with plat, parallel top and bottom surfaces. Solved Given The Data Tables Below A Compare Values Measured Using Vickers And Rockwell Hardness Test Results You Can Find Conversion Chart On Internet Type In. Shore A There are several hardness scale conversion systems, including BS 860 and ASTM E140. Related: Brinell Hardness Testing Equation. If the hardness is below this range, use Rockwell hardness B scale (HRB). Take a hardness measurement at 3 and then 15 seconds. The Shore hardness conversion table listed below is for the convenience of The Shore hardness scale is an internationally accepted standard that quantifies the hardness of a material. 085. Equipment for hardness determination of Plastics, Elastomers, O-Rings, Seals, Gaskets, Rubber Rollers. The microtechnic is reproduced in irregular, flat, surfaces, and in cross sections as small CIMETRIX Ltd. 0 84. The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. [1] Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. kpsi. = (130 - HRB) / 500. Shore A00. Hardness Conversion Charts Click here to view and print a handy hardness conversion chart which includes conversions for Rockwell C (HRc), Rockwell A (HRa), Brinell (Bhn), Vickers (Hv), Scleroscope. （HV）. 2015. Durometer Hardness. 0,4 mm. The conversion between the scales is actually non-linear, the differences increase with increasing hardness. 35 123 44 69 -- 83 62. 444" steel ball into the wood to half of its diameter. The two test methods use totally different indentor geometries, applied forces, test times and pro cedures. Note that the hammer rebound is also Dec 13, 2023 · Shore hardness value may vary in the range from 0 to 100. 0 • 90. RELATION OF HARDNESS TO OTHER MATERIAL PROPERTIES. SHORE DUROMETER HARDNESS SCALES VIP Rubber and Plastic Company 540 S Cypress Street, La Habra, Ca. Approx Tensile Strength (psi) 60kg Brale. This is how many manufacturers do it. Durometer scale is a measurement for rubber material hardness. The depth of the indentation is transmitted to a spring within the dial gauge of the durometer, which gives the hardness value. Rubber-Lexicon. Shore OO Durometer. Janka. （HB） 10mm ball. DHS and Butterfly either use same or similar scale. Newage Testing Instruments recommends that you obtain a copy of the appropriate standard for your application and that you read and understand the standard prior to testing. 0 86. Shore® is a registered tradename of Instron Corporation. 75 point and is available in Type F for soft materials like sponge rubber and urethane foam. In basic terms, these work by measuring the resistance the material provides as a load is applied to them. The Brinell hardness test was the first standardised test to be widely used, especially on metals. There are many hardness and can be categorized dependent on the type of rubber Conversion of hardness-to-hardness or hardness-to-tensile-strength values for unalloyed and low-alloy steels and cast iron. 5 85. The Shore hardness of rubber is measured with a spring-loaded indentation device known as a Shore durometer. Please note, the accuracy of these formulas can vary, and they are often used Jan 28, 2022 · Hardness Rating Chart Extra Soft Soft Medium Soft Medium Hard Hard Extra Hard SHORE 00 0 10 20 30 40 50 60 70 80 90 100 SHORE A 0 10 20 30 40 50 60 70 80 90 100 Type A -Soft Rubber, Elastomers, Waxes, Printing Rollers Rockwell: Rockwell Superficial: Brinell: Vickers. Professionals across industries can make informed decisions about materials and their applications by understanding the BHN, HV, HRB, and HRC hardness conversion chart. The term is also used to describe a material's rating on the scale, as in an object Jan 25, 2012 · These hardness measurements were done with a specialised Shore O foam durometer, which are specifically designed for measuring soft solids like sponges. com for Non-Austenitic Steels Rockwell C Vickers Brinell Knoop Rockwell Rockwell Superficial Scleroscope 150 kgf (HRC) (HV) 10 mm Steel ball 3000 kgf (HBS30) 10 mm Carbide ball 3000 kgf (HBW30) 500 gf and over (HK) A Scale 60 kgf (HRA) D Scale 100 kgf (HRD) 15N Scale 15 kgf (HR15N) 30N Jan 15, 2019 · Ones marked at 39 normally come up at just over 50. 3456 fx: 562. Lower numbers indicate less resistance and softer materials. Brinell hardness. Buy ping pong rackets and paddles online. The Shore OO hardness scale is commonly used to measure the hardness of very soft and elastic materials, such as gels, lightweight foams (silicone foam), and highly elastic rubber. These values only indicate the hardness of the sponge without the top rubber. If you refer to the values in the go-kart tire durometer chart above, the scale goes from 0 – 100 and the higher the number is, the harder the go-kart The Shore D Hardness test is also called Durometer Hardness Test. Vickers hardness. The Shore hardness value indicates the degree of indentation resistance of a material when a specific force is applied. 90° sh A is a very hard rubber with limited elasticity but serves its purpose where some flexibility is required but in a near rigid format. The result is provided as a number which is recorded IRHD normal. Today we’re going to talk about durometer of rubber products. 486. Statistically reliable information cannot be given on the uncertainty of these values because the test conditions The following Conversion Charts provide useful steel related information and references for products we regularly stock. For our own rubbers, we always specify the The Asker High Performance series has an accuracy of ±. 1 were obtained in interlaboratory tests by the Verein Deutscher Eisenhüttenleute (VDEh) (German Iron and Steel Institute) using verified and calibrated hardness testing machines. Figure 4 shows a chart of measured IRHD versus Young’s Modulus. from 35 to 90 IRHD. shore hardness scales. Where: HRC: Represents Rockwell Hardness on the C scale, a common hardness measure for harder materials. Currency - All prices are in AUD Currency - All prices are in AUD ＊1 Bold numbers are according to ASTM E 140 Table 1 (arranged jointly by SAE, ASM and ASTM). A flattened cone is pressed through a spring into the surface of the rubber. Silicone Solutions has customers from around the globe. Sep 24, 1998 · the stiffness of the material. HRC = 0. 500 kg. Hardness measures a material’s resistance to deformation. 0914 oz) is used to strike the testing surface from a known height (10 inches; 254 mm). There are different Shore Hardness scales for measuring the hardness of different materials. So, let’s get started! Copper Alloy Hardness and Strength Conversion Values (Excerpt from GB/T3771-1983) Jun 29, 2021 · Shore A hardness is measured based on ASTM D-2240 standards for cured rubber compounds, and ASTM D-1414 standards for finished o-rings. C scale hardness. The Shore Scleroscope measures hardness in terms of material elasticity. The hardness of rubber measured by means of a durometer is expressed in the unit Shore A. 54 mm). , 65±5, 70±5, 90±5); (2) The inherent minor variance from batch to batch of a given rubber compound due to slight differences in raw materials and processing techniques; and. Standards in the Rubber and Carbon Black Manufacturing Industries F1957 Test Method for Composite Foam Hardness-Durometer Hardness 2. The Durometer measures hardness by the penetration of an indentor into the rubber sample. 5 70. Leeb (Type D) Hardness Conversion for Non-Austenitic Steels (Rockwell C Hardness Range) Leeb Hardness, Type D Impact Device (HDL) Rockwell C Hardness 150kgf (HRC) Vickers Hardness (HV 10) Brinell Hardness 10mm Steel Ball 3000kgf (HBS) 828. Figure 22 Hardness units conversion table . Shore Durometer is a scale used industry-wide to measure the hardness of rubber and plastic materials. 3460 CONVERSION CHART Steel Hardness Converter. This is because DHS and ESN use different scales to measure hardness values. When selecting rubber sheet, there are various thicknesses and lengths, but also varying hardnesses. Brinell Hardness HB Rockwell HRC Rockwell HRB Vickers HV N/mm²; 800: 72---780: 71 Dec 5, 2017 · The Rockwell Metal Hardness Scales Explained. For those two above, larger value indicates harder material. The Rockwell B values are superimposed on this table using an approximation from ASTM E140 Table5, which compares Rockwell B and . Hardness Conversion Table Brinell Hardness HB 10/3000/15 Rockwell Hardness Superficial Hardness Approx Tensile Dia (mm) HB A 60kg B 100kg C 150kg 15T 15kg 30T 30kg 45T 45kg (KSI) 5. 0 10 20 30 40 50 60 70 80 90 100 11. Shore : A: B: C: D: E: F: 15-N: 30-N: 45-N: 30-T: 3000 kg: 500 kg: 136 . 38 – 47° = medium-hard rubber. The letter "D" symbolizes the type of durometer used to measure the hardness of a material. As per ASTM D2240 standard, there are HS. Click on the image to open in a New Tab. An empirical relationship between depth of indentation and Young's modulus for a perfectly elastic isotropic material has been used to derive a hardness scale which can conveniently be used for most rubbers. If you have additional materials that you would like to confirm type and model for, please contact us and we’ll add them to this list. Shore Hardness is a method of measuring the hardness of a material. Rubber-Compass®. Durometer is the international standard for measuring the hardness of rubber, plastic, and most nonmetallic materials. In that case, our acceptance criteria are -3 to +2 points. A diamond-tipped hammer (size of 40 grains; 2. The resilience of rubbers and plastics means A variety of hardness testing methods are available including the Brinell and Rockwell tests. ) An alternative to the Shore hardness for quantifying the hardness of elastomeric or rubber materials. Table A Brinell Hardness to Rockwell Hardness Conversion Table Oct 24, 2019 · The method for measuring IRHD hardness’s is through an instrument with a spherical indenter which indents the sample under a minor and major Load. The reason most roller companies don’t own a plastometer is the price of the instrument itself. created date: Feb 12, 2024 · Shore hardness measurement is a widely used method to quantify the hardness of rubber materials. Hardness Conversion per ASTM E-140, Strength per ASTM A370, See bottom half of table. It is a method to characterize an elastomer by its resistance to penetration of an indenter of known geometry by a known force. Instruments exist for most Oct 13, 2023 · HARDNESS CONVERSION TABLE 31. 59 g; 0. Used to describe the hardness of Sponges. They have been independently developed and appear to be consistent with ASTM E-140 and A-370. 5-2. I have very limited insight into the "rubber-world" but could not help thinking that with both Tenergy and Dignics Butterfly always kept adding a hard version and the Chinese went the Sep 18, 2018 · Scope. Note that an object may fall within more than one scale. Two scales are in general use throughout the world – the IRHD (International Rubber Hardness Degree) scale and the Shore scale. The test methods and instrumentation for each are distinctly different, for example in the time and method of indentor application and geometry. These methods differ primarily in the diameter of the indenting ball and the magnitude of the indenting force, these being chosen to suit the particular application. The standard Rockwell: Rockwell Superficial: Brinell: Vickers. approx. 2 ISO Standard:4 ISO/IEC 17025: 1999 General Requirements for the Com-petence of Testing and Calibration Laboratories 3. It is a vital parameter for rubber The method allows measurement of either the initial indentation or the indentation after a specified period of time, or both. Maximum hardness value 100 corresponds to zero penetration. For ASTM D-2240 standards, the material thickness cannot be less than 0. Shore Durometer hardness testing of plastics is described, and conversion charts correlating various scales are presented. The higher number of hardness represents the harder material. Compared to a durometer which may cost $300 to $500, a plastometer is about $2,500 to $3,500. As a guide we show the theoretical conversion comparison of tonnes tensile in Newtons/mm² and MPa to steel hardness. Log "E" False Sense of Security Durometer Chart. 37° = soft rubber. H3 40d would be like 55d esn i think. e. PLASTICS AND RUBBER HARDNESS COMPARISON CHART Polyurethanes Plastics Rubber z 90 R so 70 Sr 60 For more information on Redcow products please call: 833 381 1195 . Rubbers by Highest Sponge Hardness Rating View users' ratings and reviews of table tennis equipment to compare products and find the right rubber, blade or racket to fit your playing style. SHORE A HARDNESS SCALE CROSS REFERENCES Extra Soft Soft Medium Hard Shore 00 Shore A Shore D Shore 0 Shore B Shore C 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Nov 26, 2019 · The latter relates to rigid materials whereas the A scale relates to bendable rubbers. Hardness is one of the most widely measured properties u sed to characterise rubber. Harder materials have more wear resistance, but they are also less flexible. Apr 15, 2023 · No that doesnt make sense to me. Dignics is 40 hardness, but that would be 50 ESN i think. There are five common types: shore A, shore B, shore C, shore D, shore 0, and shore 00. Durometer is the measurement of hardness in polymers, elastomers, and rubber. Yes, that sounds correct to me. Brinell Hardness: Vickers Hardness: Rockwell Hardness: Tensile Strength: 100 HB: 105 HV - HRC: 335 N/mm 2: 101 HB: 106 HV - HRC Nov 29, 2022 · The hardness of a table tennis rubber is given in degrees. Also, the weights of the indenters used are pretty different as type B indenter ball weighs 100kg while type C weighs 150kg. shore OO durometer. The indenter types are one of the apparent differences as Rockwell hardness B uses a hardened ball made of hardened steel while the Rockwell C scale uses a cone-shaped indenter with a diamond tip. Asker models are available in ASTM D 2240 durometer Types: Shore A Hardness, Shore D Hardness and Asker C Hardness durometer scales. 5 1787 • NANA NA 7891. USA Microsoft Word - Durometer Hardness Conversion Table. （HRC） *3 Rockwell. 5 33. Shore Durometer Conversions Rule of thumb is that the thickness should exceed 10 times the depth of the indentation with a diamond indenter and 15 times the depth of the indentation with a ball indenter. copyright 2019. For softer materials, there are alternate scales using a 1500 kg or 500 kg load to avoid excessive indentation. The lower the number (or farther to the left) on the durometer scale, the “softer The Shore durometer is a device for measuring the hardness of a material, typically of polymers. 70 Durometer (MOST COMMON) = Rubber Tire/Rubber Shoe Heel. The most commonly used hardness is 60° Shore A and is specified in the majority of applications. Durometer* Conversion Chart MECHANICAL RUBBER Approximate Hardness Value (to be used as a guide) Type Extra Soft / Soft (Chewing Gum) Medium Soft (Pencil Eraser) Medium Hard (Windshield Wiper Blade) Hard (Skate Wheel) Extra Hard (Bowling Ball) Shore A Rubber, Soft Plastic & Polyurethane 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Shore 10-30A: Lowest on the rubber durometer chart are extremely soft and flexible rubber sheeting. The scale operates within a numeric range of 00 to 100, with 00 being the softest material and 100 being the hardest. Rockwell hardness *3. ＊2 1MPa = 1N/mm2 ＊3 The value in parentheses in the table are for ranges rarely used and indicated for reference. These approximate relationships between hardness and tensile strength do not apply to nonferrous metals, with the possible exception of certain aluminum alloys. 01. 100kg Brale. 80 92. The hardness conversion values given in Table A. smoothon since 1895 . 136. 95HB + 11. The material will resist the indentation, deflecting Apr 29, 2024 · The Brinell Hardness Test consists of indenting the test material with a 10mm diameter hardened steel or tungsten ball subjected to a load of 3000 kg. 30 126 44. The Equotip 550 is the most versatile portable solution for hardness testing combining Leeb with Portable Rockwell. 1,5 bis 2,5 mm. Jul 30, 2023 · Here are the measurement contents for these three hardness scales: 1. In 2023, Boston Centerless expanded our suite of in-house material validation and testing services in order to Elastomer Hardness Selection chart below offers a guideline of composition and general properties as well as general chemical resistance information. Hardness is an important consideration in sealing materials. 5mm into the material. 1 This test method covers a procedure for measuring the hardness of vulcanized or thermoplastic rubber. 0 1865 • NA NA NA 7991. Different conversions can be difficult to remember at all times, and this shore durometer conversion chart will help you when deciding on what solutions you need for your project. "Asker C 25" means a hardness measured by using a spring type hardness tester Asker C in accordance with SRIS 0101 (Standard by the Society of Rubber Industry, Japan). 1 This test method permits hardness measurements based The hardness is expressed in international rubber hardness degrees (IRHD). Based on ISO 18265-2003. 5. Summary of Test Method 3. The hardness is obtained by the difference in penetration depth of a specified dimension ball under two conditions of contact with the rubber: ( 1) with a small initial force and ( 2) with a much larger final force. 5 1710 • NANA NA 7790. Steel hardness conversion table containing conversion factors for Rockwell, Vickers & Brinell. Many roller companies will use a durometer to check the hardness of a roll specified in P&J and use a conversion chart to compare. 809. If the hardness exceeds this range, use Rockwell hardness A scale (HRA). Shore hardness is measured with a device known as a Durometer, hence the term ‘Durometer hardness’. It offers a comprehensive snapshot that makes it one of the most valuable plastics and rubber hardness scales available. (3) The human variance encountered in Hardness is measured from the depth of indentation of a spherical indentor, under a specified force, into a rubber test piece. It is defined in ASTM E10. 097-0. Brinell hardness test. The higher the number (or farther to the right) on the durometer scale, the “harder” the material with greater indentation resistance. The hardness of a material is its resistance to surface penetration. It is a dimensionless quantity. The hardness values listed below are approximate and should only be. 30-T. The results vary between a minimum Shore hardness of 0 to a maximum shore hardness of 100 which relates to zero penetration. The Hardness Tensile Strength relations may vary according to the processing history or the chemical composition of Jul 24, 2023 · Related reading: Hardness Conversion Chart: HLD, HRC, HRB, HV, HB, HSD. An IRHD value of 0 corresponds with a zero Young’s modulus, while an Figure 21. 23/ 62142323 www. The rubber that were measures below are only just over 2mm thick, and Mar 27, 2024 · HRC implies Rockwell hardness C scale. Note 1: Roll hardness is measured with metal hardness tester from company Proceq (Equotip). Note 2: HV and HRc. 0 87. The table shows a set of values that has been used for stainless steels and also includes a tensile strength, (UTS), comparison. Step 3: Take a total of five measurements at varying points on the test piece. IHRD. 338,000 PSI. 5 1633 • NANA NA 55 Durometer = Inner Tube. Conversion "HV" in "HRc" is based on ASTM E 140 (alloy and tool steels) and partially ISO 18265:2013 (unalloyed and low-alloy steels and cast iron). Woods with a higher rating are harder than woods with a lower rating. Approx Tensile Strength (psi) 60kg Brale rubber band pencil eraser tire tread shoe heel shopping cart wheel hard hat. The Shore hardness is measured with a device known as a Durometer and the determined hardness values are therefore referred to as Durometer hardness. 5 61 5. According to the Shore scale, hardness may be defined as a material’s resistance to permanent indention. May 17, 2023 · Step 1: To measure hardness, place the test piece on a hard, flat or rigid surface, the pressure will be applied as quickly as possible, but without shock. 48 – 60° = hard table tennis rubber. 7. up to approx. –. When measuring by means of an IRHD meter, using the unit IRHD, a sphere is HARDNESS CONVERSION TABLE PRIMERJALNA TABELA TRDOT. 5 84. The durometer consists of a metal truncated cone indenter, attached to a small spring as shown in the diagram above the indenter is extended 2. This paper is concerned with the micro versions of these test methods The following chart matches materials to the correct durometer type and model number for testing. 100kg 1/16" Ball. The result is that on a hardness scale ranging, for example, from zero to 60, we allow for +3 to -2 points, a total range of 5 points; and if the hardness being measured is above 60, we use the reverse. (. The differential indentation depth is measured and tabulated to read directly in “IRHD” degrees. (3) Penetration Used to describe the hardness of gel materials. For Jun 9, 2024 · International Rubber Hardness Degrees. Check Conversion Table 10kg 98n Rockwell Hardness Tester With Loading Dwell Unloading China Manual Made In Com. 5 43. 584. Although the durometer is accurate, the sponge sample required for absolute measurements need to be at least 10mm thick. A rubber durometer can be used to measure the hardness of not only solid rubber but also cellular rubber (e. The IRHD value is related to the depth of penetration into a flat specimen of a spherical indenter under a defined force. 90631 ph: 562. 5 -- 83. 905. Hardness covers several properties: resistance to deformation, resistance to friction and abrasion. Hardness value is determined by the penetration of the Durometer indenter foot into the sample being tested. In table tennis, there are 3 different hardness scales, which makes comparing rubbers from different manufacturers quite confusing. It goes between 0 and 100. Go-kart tires use the Shore A scale to grade the hardness of rubber. 150kg Brale. load 3000kgf. 800. 5 • 10091. Only the softest materials will have a Shore rubber hardness in this low range, and such sheet rubber materials are not recommended for physically demanding applications. 1 inch (2. Hardness Conversion Chart. Thermoset rubber materials are available in durometers ranging from 20 Shore A to 90 Shore A, while even harder materials are available for thermoplastic elastomers on the Shore D scale. struers. May 28, 2019 · The most commonly used gauges for measuring the hardness of rubber are the durometer and the IRHD meter. Conversion Table of Hardness Approximate conversion value for steel Rockwell C hardness＊1 (SAE J 417) revised in 1983 The first way is to use a Durometer device. 98. HRC and HB are both widely used in production. 326 315 304 294 287 279 269 261 254 245 238 232 225 219 211 206 202 198 191 185 181 176 171 168 163 159 154 150 146 142 138 134 131 126 124 122 118 116 113 111 107 102. The harder the material, the higher the rebound. Below is a comparison chart of shore A versus other shore values. Shore in the 1920s and has since become an industry standard. Step 2: Record at specific times. = (130 - 43) / 500. 24 inches. Please note that if the numbers entered do not conform to the search criteria the boxes will remain blank. Jun 18, 2015 · Approximate conversion value for steel Rockwell C hardness ＊1. 59. Maximum penetration for each scale is 0. the only accurate way of ensuring proper product selection. 40 121 Reference Table: Steel hardness conversion chart - all values approximate. 3000 kg. 5 • 92. durability_max - upper limit for Durable. That's still a range of 5 points on the hardness scale. Whether you’re a seasoned professional or just starting out in the industry, this information is a valuable resource that you won’t want to miss. doc. Aug 2, 2018 · Durometer is both a measure of hardness of the material and the instrument used to measure it. 1021 SW Klickitat Way, Suite 102 Seattle, WA 98134. Global O-Ring offers several devices to test the hardness or durometer of an o-ring. EXAMPLE: A hardness reading of HRB 43 is observed. Note that the chart uses a semi-log scale (IRHD is on a linear scale plotted against the logarithm of Young’s Modulus). The Shore Durometer Scale is a standardized way of quantifying the hardness of a material, usually rubber or plastic. It was developed by Albert F. 5 22. This is done using a device known as a Shore Durometer or Shore Hardness Tester. HB: Represents Brinell Hardness, a measure of hardness obtained by pressing a hard spherical indenter into the material under a specific load. used as a durometer selection guide. Think of a rubber band, mouse pad, or gel insoles for your shoes. For example, a 40° DHS Hurricane 3 NEO is an extremely hard rubber, while a 40° ESN rubber is a very soft rubber. 5 4 Log 10 E Figure 4: IRHD vs. 351,000 PSI. Conforms to: JIS K 6253, JIS K 7215, ASTM D 2240, ISO 7619, ISO Rubber hardness can be determined using either the IRHD (International Rubber Hardness Degree) or the Shore Scale. You may purchase the ASTM standard from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, Phone 610-832-9585, Web www Aug 30, 2021 · What is Shore Hardness and Durometer. 819. 5 • 91. This selection guide is intended for reference only. The scale used in the table is pounds-force. The rebound of the hammer is measured. A material that is too soft may break under stress while a very The Shore A scale is most commonly used for measuring the hardness of rubbers and can be determined using a durometer gauge. Approx Tensile Strength (psi) 60kg Brale BHN, HV, HRB, and HRC Hardness Conversion Chart. Date/datum: 08. Durometer is an international standard that measures the hardness of rubber. IRHD = International Rubber Hardness Degree The International Rubber Hardness Degree according DIN ISO 48 – Part 1 is, beside the Shore hardness, another. Also includes approximate tensile strength values. On European rubbers it generally gives a reading very close to the manufacturer's stated hardness. HRC’s applicable range is HRC 20-67, equivalent to HB225-650. 1. foams, sponges), plastics, and other elastomeric materials. This knowledge aids in selecting the right material for specific The conversion values are approximate values only. The ASTM D 2240 standard recognizes 12 different durometer scales. ** This conversion calculator gives approximate hardness values for various hardness scales based on the Rockwell “C” Scale. 95 Durometer = Shopping Cart Wheel. The testing process involves pressing a carbide ball indenter into the 58. Each Shore durometer has a truncated cone indenter, which is pressed onto the rubber sample. 5 42 60 5. The Shore Duromter A and D scales of hardness are commonly used for rubber and 'soft' polymers such as polyolefins, polyurethanes, vinyl, and fluoropolymers. g. The Janka test measures the amount of force required to embed a 0. Measures rubber and gels that are very soft. Testing methods and durometer types may vary for the Conversion Charts. Conversion Table. Thus, the Hardness Conversion Chart below is used to convert hardness values between testing methods as well as estimate tensile strength. Physical tests by the end user are. This value corresponds to minimum Shore hardness: 0. Durometer is a measurement of hardness and like other hardness test measures the depth of indentation in the material created by a given Force using a standardized pressure foot. lu gt op nu bh ni ob ha us bp