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IS 1570 (Part 5):1985 X70Cr21Mn6Ni2N Steel: Specifications & Listings

IS 1570 (Part 5):1985 X70Cr21Mn6Ni2N: X70Cr21Mn6Ni2N: high alloy, stainless or heat-resisting steel. Specified in IS 1570 (Part 5):1985.

Category: Stainless Steel
Grade Details
GradeIS 1570 (Part 5):1985 X70Cr21Mn6Ni2N
Standard IS 1570 (Part 5):1985
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 5) X55Cr21Mn8Ni2N IS 1570 (Part 5):1985 Close Alternative
IS 1570 (Part 5) X53Cr22Mn9Ni4N IS 1570 (Part 5):1985 Related Material
BS 970 EN61 BS 970:1955 Related Material
ASTM A959 442 ASTM A959:2011 Related Material
ASTM A959 414 ASTM A959:2011 Related Material
ASTM A959 431 ASTM A959:2011 Related Material
ASTM A959 308 ASTM A959:2011 Related Material
ASTM A276/A276M S30800 ASTM A276/A276M:2017 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 Si Mn P S Cr Ni
0.65-0.75 0.45-0.85 5.5-7.0 <=0.045 <=0.035 20.0-22.0 1.4-1.9
Mechanical Properties
Hardness >=321 HB
Condition Valve steel, hardened and tempered (Table 6)

More data from IS 1570 (Part 5):1985

From the standard
Hardness, valve steels, hardened and tempered valve steels
Hardness
321 min HB
Source: IS 1570 (Part 5):1985, Table 6
Recommended heat treatment 3 entries
Solution treatment temperature (ST+P)
1100 to 1200 deg C
Solution treatment quenching medium
water
Ageing treatment temperature
730 to 780 deg C
A annealing, S softening, ST solution treatment, Q quenching, T tempering, P patenting.
Source: IS 1570 (Part 5):1985, Table 7

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