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BS 970 (Part 1) 637M17 vs IS 1570 (Part 4) 16Ni4Cr3

Strong Match — 87.4% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 637M17 (BS 970 (Part 1):1983) and IS 1570 (Part 4) 16Ni4Cr3 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 637M17 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 16Ni4Cr3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 637M17 vs IS 1570 (Part 4) 16Ni4Cr3 is a 87.4% 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 87.4%.

Frequently Compared With BS 970 (Part 1) 637M17:
IS 11169 (Part 1) 10Ni5Cr4 EN 10084 10NiCr5-4 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
87.4%
MECHANICAL MATCH
No shared data
OVERALL
87.4%
Specifications
Property BS 970 (Part 1) 637M17 IS 1570 (Part 4) 16Ni4Cr3
Standard BS 970 (Part 1):1983 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.14-0.20 0.12-0.20
Mn (%) 0.60-0.90 0.60-1.00
Cr (%) 0.60-1.00 0.60-1.00
Ni (%) 0.85-1.25 0.80-1.20
P (%) <=0.035 Not specified
S (%) <=0.040 Not specified
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) 637M17 IS 1570 (Part 4) 16Ni4Cr3
Tensile Strength Not specified >=840 MPa
Elongation Not specified >=12%
Izod Impact Not specified >=41 J
Condition Not specified Case hardening steel, refined and quenched, core properties
Typical Applications
BS 970 (Part 1) 637M17
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
IS 1570 (Part 4) 16Ni4Cr3
Not documented
Key Differences
Can BS 970 (Part 1) 637M17 Be Substituted With IS 1570 (Part 4) 16Ni4Cr3?
BS 970 (Part 1) 637M17 and IS 1570 (Part 4) 16Ni4Cr3 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 16Ni4Cr3 is often considered as a substitute for BS 970 (Part 1) 637M17 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) 637M17
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IS 1570 (Part 4) 16Ni4Cr3
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 637M17 and IS 1570 (Part 4) 16Ni4Cr3?
BS 970 (Part 1) 637M17 specifies P, S which are not specified for IS 1570 (Part 4) 16Ni4Cr3. IS 1570 (Part 4) 16Ni4Cr3 specifies Si which is not specified for BS 970 (Part 1) 637M17.
Can BS 970 (Part 1) 637M17 be substituted with IS 1570 (Part 4) 16Ni4Cr3?
BS 970 (Part 1) 637M17 and IS 1570 (Part 4) 16Ni4Cr3 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 16Ni4Cr3 is often considered as a substitute for BS 970 (Part 1) 637M17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.