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BS 970 (Part 1) 805A20 vs IS 1570 (Part 4) 20Ni2Cr2Mo2

Strong Match — 94.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 805A20 (BS 970 (Part 1):1991) and IS 1570 (Part 4) 20Ni2Cr2Mo2 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 805A20 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 20Ni2Cr2Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 805A20 vs IS 1570 (Part 4) 20Ni2Cr2Mo2 is a 94.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 94.3%.

Frequently Compared With BS 970 (Part 1) 805A20:
IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
No shared data
OVERALL
94.3%
Specifications
Property BS 970 (Part 1) 805A20 IS 1570 (Part 4) 20Ni2Cr2Mo2
Standard BS 970 (Part 1):1991 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.18-0.23
Mn (%) 0.70-0.90 0.70-0.90
Cr (%) 0.40-0.60 0.40-0.60
Mo (%) 0.15-0.25 0.15-0.25
Ni (%) 0.40-0.70 0.40-0.70
Si (%) Not specified 0.15-0.35
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 (Part 1) 805A20 IS 1570 (Part 4) 20Ni2Cr2Mo2
Condition Case hardened, 19 mm test bar Not specified
Tensile Strength 850 MPa min Not specified
Elongation 11 % min Not specified
Typical Applications
BS 970 (Part 1) 805A20
Case hardening steel (section four)
IS 1570 (Part 4) 20Ni2Cr2Mo2
Not documented
Key Differences
Can BS 970 (Part 1) 805A20 Be Substituted With IS 1570 (Part 4) 20Ni2Cr2Mo2?
BS 970 (Part 1) 805A20 and IS 1570 (Part 4) 20Ni2Cr2Mo2 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 20Ni2Cr2Mo2 is often considered as a substitute for BS 970 (Part 1) 805A20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 (Part 1) 805A20
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IS 1570 (Part 4) 20Ni2Cr2Mo2
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 805A20 and IS 1570 (Part 4) 20Ni2Cr2Mo2?
IS 1570 (Part 4) 20Ni2Cr2Mo2 specifies Si which is not specified for BS 970 (Part 1) 805A20.
Can BS 970 (Part 1) 805A20 be substituted with IS 1570 (Part 4) 20Ni2Cr2Mo2?
BS 970 (Part 1) 805A20 and IS 1570 (Part 4) 20Ni2Cr2Mo2 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 20Ni2Cr2Mo2 is often considered as a substitute for BS 970 (Part 1) 805A20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.