Typical Alloys


Austenitic Manganese Steel
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
M2 (210-230) ASTM A128 Gr. C 1.2 2.0 - 12.5 - Crusher parts - Medium section, Hammers
M19 (230-250) - 1.4 2.0 - 18.0 - Crusher parts - High abrasion, lower impact
M22 (230-250) - 1.3 0.7 - 23.0 - Special high abrasion
Carbon Low Alloy Steel
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
A2 (140-170) ASTM A27 70-36 0.25 - - 0.6 - Mild carbon steel, adjusts to WCB, LCB
CS1 (250-300) ASTM A148 90-60 0.35 0.7 - 1.1 - General purpose medium strength steel
CS2 (275-350) AISI 41300.3 0.9- 0.5 0.2 Higher impact strength medium carbon steel
Wear Alloy Steels
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
WR1 (min. 45HRC) - 0.25 1.1 0.7 0.8 0.4 Impeller Bars, Hammers
WR2 (450-500) - 0.35 1.1 - 1.0 0.4 General wear & impact resistant
WR3 (380-450) AISI 4140 Modified 0.4 1.2 - 1.0 0.3 Diaphragm & Grate Liners
WR7 (450-500) - 0.3 7.0 - 1.0 - Discharge Grates
UI11 (48-57 HRC)-1.6 13.0 - 0.5 max - Shell Liners
Heat Resistant Steel
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
S3 - ASTM A297 HH 0.4 25.5 12.5 2.0 max 0.5 max Cooler Grates. High heat strength up to 1800°F
S4 - ASTM A297 HK0.4 25.5 21.02.0 max 0.5 maxNose Ring Segments. High heat strength up to 1900°F
S5 - ASTM A297 HN0.4 21.0 25.02.0 max 0.5 maxImproved high strength at 1900°F
Standard Iron
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
D1 (185-210) ASTM A536 65/45/1 3.7 - - - 0.6 max Ductile Iron
HE3 - - 3.4 0.6 - - 0.6 max Heat Resistant Iron
Martensitic Iron
Nominal
Hardness
HRC (BHN)
Typical Equivalent
Standard
Carb Cr Ni Mang Moly Remarks & Common Usages
UI15 (min. 52HRC) ASTM A532 IIB 2.7 16.0 2.5 max2.0 max 3.0 maxShell Liners, Impeller Bars
UI25 (min. 58HRC) ASTM A532 IIIA 2.7 26.5 2.5 max2.0 max 3.0 maxShell Liners, Valve & Pump Parts
UN1 (min. 52HRC) ASTM A532 IA 3.2 2.5 4.02.0 max 1.0 maxNiHard equivalent, thin section castings

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