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BS 970 (Part 1) 826M31 vs BS 970 (Part 3) 826M31

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

BS 970 (Part 1) 826M31 (BS 970 (Part 1):1983) and BS 970 (Part 3) 826M31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 826M31 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while BS 970 (Part 3) 826M31 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16). BS 970 (Part 1) 826M31 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 826M31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 826M31 vs BS 970 (Part 3) 826M31 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) 826M31:
IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
No shared data
OVERALL
94.3%
Specifications
Property BS 970 (Part 1) 826M31 BS 970 (Part 3) 826M31
Standard BS 970 (Part 1):1983 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.27-0.35 0.27-0.35
Mn (%) 0.45-0.70 0.45-0.70
Cr (%) 0.50-0.80 0.50-0.80
Mo (%) 0.45-0.65 0.45-0.65
Ni (%) 2.30-2.80 2.30-2.80
P (%) <=0.035 <=0.035
S (%) <=0.040 <=0.040
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) 826M31
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
BS 970 (Part 3) 826M31
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
Key Differences
Can BS 970 (Part 1) 826M31 Be Substituted With BS 970 (Part 3) 826M31?
BS 970 (Part 1) 826M31 and BS 970 (Part 3) 826M31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 826M31 is often considered as a substitute for BS 970 (Part 1) 826M31 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) 826M31
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BS 970 (Part 3) 826M31
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 826M31 and BS 970 (Part 3) 826M31?
BS 970 (Part 3) 826M31 specifies Si which is not specified for BS 970 (Part 1) 826M31.
Can BS 970 (Part 1) 826M31 be substituted with BS 970 (Part 3) 826M31?
BS 970 (Part 1) 826M31 and BS 970 (Part 3) 826M31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 826M31 is often considered as a substitute for BS 970 (Part 1) 826M31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.