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ASTM A681:2008 P4 Steel: Specifications & Listings

ASTM A681:2008 P4: P4: mold steel (UNS T51604). Specified in A681:2008.

Category: Tool & Die Steels
Grade Details
GradeASTM A681:2008 P4
Standard ASTM A681:2008
ApplicationsTools, dies and fixtures (clause 1.2)
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
ASTM A681 A5 ASTM A681:2008 Related Material
ASTM A681 P20 ASTM A681:2008 Related Material
SAE J404 4140 SAE J404:2009 Related Material
SAE J404 4130 SAE J404:2009 Related Material
SAE J404 4135 SAE J404:2009 Related Material
KS D3867 SCM415 KS D 3867:2025 Related Material
SAE J404 4120 SAE J404:2009 Related Material
SAE J404 4118 SAE J404:2009 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn P S Si Cr Mo
<=0.12 0.20-0.60 <=0.030 <=0.030 0.10-0.40 4.00-5.25 0.40-1.00
Mechanical Properties
Hardness <=131 HB
Condition Annealed (maximum Brinell hardness)

More data from ASTM A681:2008

From the standard
Maximum hardness in delivery condition 1 condition
ConditionMaximum hardness (HB)
Annealed131
Maximum Brinell hardness (BHN).
Source: A681:2008, Table 2

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