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BS 970:1955 EN50 Steel: Specifications & Listings

BS 970:1955 EN50: EN50: Chromium-vanadium steel for wire for valve springs. Specified in BS 970:1955, Part 2.

Category: Spring Steel
Grade Details
GradeBS 970:1955 EN50
Standard BS 970:1955
ApplicationsAnnealed wire for oil-hardened and tempered springs; covered by BS 1429.
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 EN47 BS 970:1955 Close Alternative
BS 970 EN48 BS 970:1955 Close Alternative
IS 3431 50Cr4V2 IS 3431:1982 Close Alternative
IS 3195 50Cr4V2 IS 3195:1992 Close Alternative
IS 3431 60Cr4V2 IS 3431:1982 Close Alternative
EN 10089 50CrV4 EN 10089:2002 Close Alternative
IS 5517 55Cr3 IS 5517:1993 Close Alternative
JIS G4801 SUP10 JIS G 4801:2005 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 Si Mn Cr V S P
0.40-0.50 0.10-0.35 0.50-0.70 1.00-1.50 >=0.15 <=0.040 <=0.040

More data from BS 970:1955

From the standard
Status in the 1955 edition
Status
Deleted by Amendment 10
Reason
Amendment 10 (Jun 1972): spring steels moved to BS 970 Part 5:1972
BS 970:1955 was amended up to Amendment 10 (June 1972); steels were moved to the revised Parts 1 to 5 and deleted from this edition.
Source: BS 970:1955, Amendment slips 6 to 10

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