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BS 970 (Part 1):1991 905M39 Steel: Specifications & Listings

BS 970 (Part 1):1991 905M39: 905M39 is a alloy nitriding steel specified in BS 970 Part 1:1991.

Category: Alloy Steel
Grade Details
GradeBS 970 (Part 1):1991 905M39
Standard BS 970 (Part 1):1991
ApplicationsSteel for surface hardening by nitriding (section three)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
BS 970 (Part 1) 905M39 BS 970 (Part 1):1983 UK No activity yet
EN 10085 41CrAlMo7 EN 10085:2001 Europe 4 listings, 0 RFQs →
DIN 17211 41CrAlMo7-4 DIN 17211:1987 Germany 2 listings, 2 RFQs →
BS 970 EN41C BS 970:1955 UK 3 listings, 0 RFQs →
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 905M39 BS 970 (Part 1):1983 Strong Match
EN 10085 41CrAlMo7 EN 10085:2001 Strong Match
BS 970 EN41C BS 970:1955 Strong Match
DIN 17211 41CrAlMo7-4 DIN 17211:1987 Strong Match
BS 970 (Part 1) 708M40 BS 970 (Part 1):1991 Close Alternative
BS 970 (Part 1) 708M40 BS 970 (Part 1):1983 Close Alternative
IS 5517 40Cr7Al10Mo2 IS 5517:1993 Close Alternative
BS 970 (Part 1) 708H37 BS 970 (Part 1):1983 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn Cr Mo
0.35-0.43 0.40-0.65 1.40-1.80 0.15-0.25

More data from BS 970 (Part 1):1991

From the standard
Other composition limits
Designation as printed
905M39
Other limits
P 0.025 max., S 0.025 max.; Al 0.90-1.30; 4 x P + Sn <0.10 %
Alloy steel for surface hardening by nitriding. Residual-element limits as printed.
Source: BS 970 (Part 1):1991, Table 4

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