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Gear Steel
1. Property: Good heat treating characteristics, balanced strength and rigidity.
2. Typical Application: Typically used to make automotive gear, gear ring (bar) and cross-head.
3. Typical Series and the Specification
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China
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Equivalent
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Elements
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Mechanical Property
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USA
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Japan
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Germany
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C
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Si
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Mn
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Cr
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Ti
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Tension Strength/MPa
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Yield Point/MPa
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Extention Rate/(%)
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Forcibility/(%)
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Impact Absorbing AKV/J
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Not Less Than
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20CrMnTi
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30MnCrTi4
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0.17-0.23
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0.17-0.37
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0.8-1.1
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1.0-1.3
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0.04-0.1
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1080
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850
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10
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45
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55
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40Cr
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5140
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SCr440
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41Cr4
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0.37-0.44
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0.17-0.37
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0.5-0.38
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0.8-1.1
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980
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785
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9
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45
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47
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Series and Sizes:
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Gear Steel
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Series
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Round Rolled
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Round Forgeable
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Cold Draw
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Sizes
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 16 ~ 280
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135 ~ 550
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10 ~ 40
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