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BS 970 EN21 vs IS 1570 (Part 4) 15Cr6Ni6

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 EN21 (BS 970:1955) and IS 1570 (Part 4) 15Cr6Ni6 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN21 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 15Cr6Ni6 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN21 vs IS 1570 (Part 4) 15Cr6Ni6 is a 70.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 970 EN21:
NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
70.3%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 EN21 IS 1570 (Part 4) 15Cr6Ni6
Standard BS 970:1955 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.25-0.35 0.12-0.18
Si (%) 0.10-0.35 0.15-0.35
Mn (%) 0.35-0.75 0.40-0.60
Ni (%) 2.75-3.25 1.40-1.70
Cr (%) <=0.30 1.40-1.70
S (%) <=0.050 Not specified
P (%) <=0.050 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 EN21 IS 1570 (Part 4) 15Cr6Ni6
Tensile Strength ≥695 MPa (45 tons/sq in, converted) Not specified
Yield Strength ≥494 MPa (32 tons/sq in, converted) Not specified
Elongation ≥22% Not specified
Hardness 201-255 HB Not specified
Condition Hardened and tempered R, ruling section 4 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN21
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 45/55 (R) and 50/60 (S) tons/sq in according to ruling section.
IS 1570 (Part 4) 15Cr6Ni6
Not documented
Key Differences
Can BS 970 EN21 Be Substituted With IS 1570 (Part 4) 15Cr6Ni6?
BS 970 EN21 and IS 1570 (Part 4) 15Cr6Ni6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
On M-EX Right Now
BS 970 EN21
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IS 1570 (Part 4) 15Cr6Ni6
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Frequently Asked Questions
What is the difference between BS 970 EN21 and IS 1570 (Part 4) 15Cr6Ni6?
BS 970 EN21 specifies S, P which are not specified for IS 1570 (Part 4) 15Cr6Ni6.
Can BS 970 EN21 be substituted with IS 1570 (Part 4) 15Cr6Ni6?
BS 970 EN21 and IS 1570 (Part 4) 15Cr6Ni6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.