The Universal Selection Source: Plastics & Elastomers

Print Send

Hardness Rockwell M

Hardness qualifies the resistance to permanent indentation of a material. Rockwell M hardness is a standardized test which consists in measuring the depth of penetration of a polished steel ball pressed at the surface of a plastic under controlled conditions. The higher the value, the harder the material. Rockwell Hardness measures are dimensionless.

Rockwell Hardness test is generally used for hard materials, like PA, PC, PS or POM, where the resilience or creep of the polymer is less likely to affect results. Different Rockwell Hardness scales utilize different size of steel balls and different loads. The three most common scales used for plastics are Rockwell E, Rockwell M, and Rockwell R.

Test methods used to measure Rockwell Hardness M are ASTM D785 and ISO 2039-2.

Name of the polymer Explicit name of the polymer Min Value Max Value
ABS FR Acrylonitrile-Butadiene Styrene flame retardant 20.000 70.000
ABS High Heat Acrylonitrile-Butadiene Styrene High Heat 20.000 50.000
ABS High Impact Acrylonitrile-Butadiene Styrene High Impact 10.000 30.000
ABS/PC Acrylonitrile-Butadiene Styrene/Polycarbonate 50.000 70.000
ABS/PC 20% GF Acrylonitrile-Butadiene Styrene/Polycarbonate 20% glass fiber 50.000 80.000
ABS/PC FR Acrylonitrile-Butadiene Styrene/Polycarbonate flame retardant 50.000 80.000
Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (Standard Flow) Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (Standard Flow) 112.000 112.000
ASA Acrylonitrile Styrene Acrylate 10.000 20.000
ASA/PC Acrylonitrile Styrene Acrylate/Polycarbonate 30.000 60.000
ASA/PC FR Acrylonitrile Styrene Acrylate/Polycarbonate flame retardant 30.000 70.000
ASA/PVC Acrylonitrile Styrene Acrylate/Polyvinyl Chloride 30.000 70.000
CA - Cellulose Acetate Cellulose Acetate 1.000 80.000
CAB - Cellulose Acetate Butyrate Cellulose Acetate Butyrate 1.000 70.000
CP - Cellulose Proprionate Cellulose Proprionate 1.000 75.000
CPVC - Chlorinated Polyvinyl Chloride CPVC - Chlorinated Polyvinyl Chloride 40.000 65.000
ETFE Ethylene Tetrafluoroethylene 1.000 10.000
EVA Ethylene Vinyl Acetate 1.000 1.000
EVOH Ethylene Vinyl Alcohol 85.000 104.000
FEP Fluorinated Ethylene Propylene 1.000 1.000
HDPE - High Density Polyethylene HDPE - High Density Polyethylene 1.000 1.000
HIPS - High Impact Polystyrene HIPS - High Impact Polystyrene 1.000 1.000
HIPS FR V0 High Impact Polystyrene flame retardant V0 1.000 1.000
Ionomer (EMAC) Ionomer (Ethylene-Methyl Acrylate Copolymer) 1.000 1.000
LCP Liquid Crystal Polymer 40.000 76.000
LCP CF Liquid Crystal Polymer carbon fiber 99.000 99.000
LCP GF Liquid Crystal Polymer glass fiber 77.000 87.000
LCP MINERAL Liquid Crystal Polymer mineral 63.000 79.000
LDPE - Low Density Polyethylene LDPE - Low Density Polyethylene 1.000 1.000
LLDPE - Linear Low Density Polyethylene LLDPE - Linear Low Density Polyethylene 1.000 1.000
PA 11 30% Glass fiber reinforced Polyamide 11 30% Glass fiber reinforced 116.000 116.000
PA 11 rigid Polyamide 11 rigid 1.000 25.000
PA 12 glass filled Polyamide 12 glass filled 107.000 107.000
PA 46 Polyamide 46 92.000 92.000
PA 6 Polyamide 6 30.000 80.000
PA 6-10 Polyamide 6-10 1.000 50.000
PA 66 Polyamide 6-6 30.000 80.000
PA 66 30% GF Polyamide 6-6 30% glass fiber 30.000 80.000
PA 66 30% mineral filled Polyamide 6-6 30% mineral filled 30.000 80.000
PA 66 IM 15-30% GF Polyamide 6-6 impact modified 15-30% glass fiber 66.000 96.000
PA 66 impact modified Polyamide 6-6 impact modified 50.000 94.000
PAI Polyamide-Imide 105.000 120.000
PAI 30% GF Polyamide-Imide 30% glass fiber 95.000 110.000
PAI low friction Polyamide-Imide low friction 95.000 110.000
PAN Polyacrylonitrile 45.000 78.000
PARA 30-60% GF Polyarylamide 30-60% glass fiber 110.000 110.000
PBT Polybutylene Terephthalate 70.000 90.000
PBT 30% GF Polybutylene Terephthalate 30% glass fiber 90.000 95.000
PC 20-40% GF Polycarbonate 20-40% glass fiber 70.000 95.000
PC 20-40% GF FR Polycarbonate 20-40% glass fiber flame retardant 70.000 95.000
PC high heat Polycarbonate high heat 70.000 90.000
PCTFE Polymonochlorotrifluoroethylene 10.000 40.000
PE 30% GF Polyethylene 30% glass fiber 1.000 20.000
PEEK Polyetheretherketone 55.000 100.000
PEEK 30% CF Polyetheretherketone 30% carbon fiber 70.000 107.000
PEEK 30% GF Polyetheretherketone 30% glass fiber 70.000 103.000
PEI Polyetherimide 100.000 110.000
PEI 30% GF Polyetherimide 30% glass fiber 90.000 125.000
PEI mineral filled Polyetherimide mineral filled 90.000 120.000
PESU Polyethersulfone 85.000 88.000
PESU 10-30% GF Polyethersulfone 10-30% glass fiber 90.000 99.000
PET Polyethylene Terephtalate 50.000 100.000
PET 30% GF Polyethylene Terephtalate 30% glass fiber 70.000 95.000
PET 30/35% GF Impact modified Polyethylene Terephtalate 30/35% glass fiber impact modified 62.000 62.000
PE-UHMW Polyethylene -Ultra High Molecular Weight 1.000 1.000
PFA Perfluoroalkoxy 1.000 1.000
PI Polyimide 110.000 110.000
PMMA Polymethylmethacrylate (Acrylic) 70.000 105.000
PMMA high heat Polymethylmethacrylate (Acrylic) high heat 90.000 100.000
PMMA Impact modified Polymethylmethacrylate (Acrylic) impact modified 35.000 80.000
PMP Polymethylpentene 100.000 100.000
PMP 30% GF Polymethylpentene 30% glass fiber 1.000 20.000
PMP mineral filled Polymethylpentene mineral filled 1.000 20.000
POM Polyoxymethylene (acetal) 75.000 94.000
POM impact modified Polyoxymethylene (acetal) impact modified 35.000 79.000
POM low friction Polyoxymethylene (acetal) low friction 58.000 94.000
POM mineral filled Polyoxymethylene (acetal) mineral filled 83.000 90.000
PP 10-20% GF Polypropylene 10-20% glass fiber 20.000 50.000
PP 10-40% mineral filled Polypropylene 10-40% mineral filled 1.000 20.000
PP 10-40% TALC Polypropylene 10-40% talc 10.000 45.000
PP 30-40% GF Polypropylene 30-40% glass fiber 40.000 50.000
PP copo Polypropylene copolymer 1.000 20.000
PP homo Polypropylene homopolymer 1.000 30.000
PP impact modified Polypropylene impact modified 1.000 1.000
PPA – 33% glass fiber Polyphthalamide – 33% glass fiber 124.000 126.000
PPA – 45% glass fiber Polyphthalamide– 45% glass fiber 124.000 126.000
PPE Polyphenylene Ether 50.000 70.000
PPE 30% GF Polyphenylene Ether 30% glass fiber 50.000 70.000
PPE FR Polyphenylene Ether flame retardant 50.000 70.000
PPE impact modified Polyphenylene Ether impact modified 50.000 70.000
PPE mineral filled Polyphenylene Ether mineral filled 60.000 70.000
PPS Polyphenylene Sulfide 70.000 85.000
PPS 20-30% GF Polyphenylene Sulfide 20-30% glass fiber 80.000 103.000
PPS 40% GF Polyphenylene Sulfide 40% glass fiber 100.000 104.000
PPS conductive Polyphenylene Sulfide conductive 70.000 100.000
PPS GF & mineral Polyphenylene Sulfide glass fiber & mineral 66.000 102.000
PPSU Polyphenylene Sulfone 80.000 80.000
PS 30 % GF Polystyrene 30% glass fiber 80.000 91.000
PS crystal Polystyrene crystal 60.000 75.000
PS high heat Polystyrene high heat 75.000 85.000
PSU Polysulfone 69.000 91.000
PSU 30% GF Polysulfone 30% glass fiber 87.000 100.000
PSU mineral filled Polysulfone mineral filled 70.000 74.000
PTFE Polytetrafluoroethylene 1.000 1.000
PTFE 25% GF Polytetrafluoroethylene 25% glass fiber 1.000 1.000
PVC 20% GF Polyvinyl Chloride 20% glass fiber 50.000 70.000
PVC plasticized Polyvinyl Chloride plasticized 1.000 1.000
PVC plasticized filled Polyvinyl Chloride plasticized filled 1.000 1.000
PVC rigid Polyvinyl Chloride rigid 1.000 70.000
PVDC Polyvinylidene Chloride 60.000 65.000
PVDF Polyvinylidene Fluoride 75.000 75.000
SAN Styrene Acrylonitrile 10.000 80.000
SAN 20% GF Styrene Acrylonitrile 20% glass fiber 80.000 100.000
SMA Styrene Maleic Anhydride 30.000 40.000
SMA 20% GF Styrene Maleic Anhydride 20% glass fiber 30.000 40.000
SMA FR V0 Styrene Maleic Anhydride flame retardant V0 30.000 40.000
SMMA Styrene Methyl Methacrylate 65.000 75.000
XLPE - Crosslinked Polyethylene XLPE - Crosslinked Polyethylene 1.000 20.000

Disclaimer: all data and information obtained via the Polymer Selector including but not limited to material suitability, material properties, performances, characteristics and cost are given for information purpose only. Although the data and information contained in the Polymer Selector are believed to be accurate and correspond to the best of our knowledge, they are provided without implied warranty of any kind. Data and information contained in the Polymer Selector are intended for guidance in a polymer selection process and should not be considered as binding specifications. The determination of the suitability of this information for any particular use is solely the responsibility of the user. Before working with any material, users should contact material suppliers in order to receive specific, complete and detailed information about the material they are considering. Part of the data and information contained in the Polymer Selector are genericised based on commercial literature provided by polymer suppliers and other parts are coming from assessments of our experts.

Copyright SpecialChem SA
Back to Top