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BS 970 (Part 1) 655M13 vs BS 970 (Part 3) 655M13

Strong Match — 93.4% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 655M13 (BS 970 (Part 1):1983) and BS 970 (Part 3) 655M13 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 655M13 is typically used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)., while BS 970 (Part 3) 655M13 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (table 15). BS 970 (Part 1) 655M13 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 655M13 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 655M13 vs BS 970 (Part 3) 655M13 is a 93.4% 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 93.4%.

Frequently Compared With BS 970 (Part 1) 655M13:
IS 11169 (Part 1) 12Ni3Cr2 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
93.4%
MECHANICAL MATCH
No shared data
OVERALL
93.4%
Specifications
Property BS 970 (Part 1) 655M13 BS 970 (Part 3) 655M13
Standard BS 970 (Part 1):1983 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.10-0.16 0.10-0.16
Mn (%) 0.35-0.60 0.35-0.60
Cr (%) 0.70-1.00 0.70-1.00
Ni (%) 3.00-3.75 3.00-3.75
P (%) <=0.035 <=0.04
S (%) <=0.040 <=0.05
Si (%) Not specified 0.10-0.40
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
BS 970 (Part 1) 655M13
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
BS 970 (Part 3) 655M13
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (Table 15)
Key Differences
Can BS 970 (Part 1) 655M13 Be Substituted With BS 970 (Part 3) 655M13?
BS 970 (Part 1) 655M13 and BS 970 (Part 3) 655M13 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 655M13 is often considered as a substitute for BS 970 (Part 1) 655M13 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) 655M13
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BS 970 (Part 3) 655M13
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 655M13 and BS 970 (Part 3) 655M13?
BS 970 (Part 3) 655M13 specifies Si which is not specified for BS 970 (Part 1) 655M13.
Can BS 970 (Part 1) 655M13 be substituted with BS 970 (Part 3) 655M13?
BS 970 (Part 1) 655M13 and BS 970 (Part 3) 655M13 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 655M13 is often considered as a substitute for BS 970 (Part 1) 655M13 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.