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Typical Alloys

The following table outlines the alloys* typically used in Unicast Wear Parts. Download the brochure here (.pdf).

WR8(475-560)-0.42.3-1.00.3Grinding mill heads, division heads and discharge grates

Unicast Typical Alloys
Nominal Hardness HRC (BHN) Typical Equivalent Standard Carb Cr Ni Mang Moly Remarks and Common Usages
Austenitic Manganese Steel
M2 (190-230) ASTM A128 GR. C 1.2 2.0 12.5 Crusher parts- Medium section, Hammers
M8 (min. 250) 1.2 2.5 8.0 High Impact End Liners
M19 (230-250) 1.4 1.5 19.0 Crusher Parts- High abrasion, lower impact
M22 (230-250) 1.3 0.7 23.0 Special high abrasion
Carbon Low Alloy Steel
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 0.8 1.1 General purpose medium strength steel
CS2 (275-350) 4130 0.3 0.9 0.5 0.2 Higher impact strength medium carbon steel
Wear Alloy Steels
WR1 (min. 45HRC) 0.25 1.1 0.7 0.8 0.4 Impeller Bars, Hammers
WR2 (450-500) 4340 modified 0.35 1.1 1.0 0.6 General wear and impact resistance
WR3 (380-450) 4140 modified 0.4 1.2 1.0 0.3 Diaphragm and Grate Liners
WR4 (450-500) 0.4 0.8 1.7 1.0 0.4 Abrasive Wear, Chute Liners
WR7 (450-500) 0.3 7.0 1.0 Grinding mill heads, division heads and discharge grates
Heat Resistant Steel
S3 ASTM A297 HH 0.4 25.5 12.5 1.3 0.3 Cooler grates. High heat strength up to 1800 degrees F.
S4 ASTM A297 HK 0.4 25.5 21.0 1.3 0.3 Nose ring segments. High heat strength to 1900 degrees F.
S5 ASTM A297 HN 0.4 21.0 25.0 1.3 0.3 Improved high strength at 1900 degrees F.
Standard Iron
D1 (185-210) ASTM A536 65/45/1 HH 3.7 0.3 Ductile iron.
HE3 3.4 0.6 Heat resistant iron.
CL30 ASTM A48 C1-30B 3.1 0.7 Cast iron.
Martensitic Iron
UI11 48-57 HRC 1.6 13.0 0.5 Shell Liners.
UI15 (min. 60HRC) 2.8 16.5 0.8 0.7 0.5 Shell liners and impeller bars.
UI25 (min. 55HRC) ASTM A532 IIIA 2.8 26.5 1.0 0.8 Shell liners, valve and pump parts.
UN1 (min. 52HRC) ASTM A532 IA 3.1 2.5 4.0 0.3 NiHard equivalent, thin section castings.

Alloys offered may change without notice. Please contact us for current information and options for custom alloys.

*Median analysis

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Kelowna, BC
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