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BS 970 (Part 1) 826M31 vs BS 970 EN25

Strong Match — 88.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 826M31 (BS 970 (Part 1):1983) and BS 970 EN25 (BS 970:1955) 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 EN25 is commonly used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for t to z (55/65 to 100 tons/sq in) according to ruling section.. BS 970 (Part 1) 826M31 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN25 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 826M31 vs BS 970 EN25 is a 88.9% 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 88.9%.

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 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
No shared data
OVERALL
88.9%
Specifications
Property BS 970 (Part 1) 826M31 BS 970 EN25
Standard BS 970 (Part 1):1983 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.27-0.35 0.27-0.35
Mn (%) 0.45-0.70 0.50-0.70
Cr (%) 0.50-0.80 0.50-0.80
Mo (%) 0.45-0.65 0.40-0.70
Ni (%) 2.30-2.80 2.30-2.80
P (%) <=0.035 <=0.050
S (%) <=0.040 <=0.050
Si (%) Not specified 0.10-0.35
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) 826M31 BS 970 EN25
Tensile Strength Not specified ≥849 MPa (55 tons/sq in, converted)
Yield Strength Not specified ≥680 MPa (44 tons/sq in, converted)
Elongation Not specified ≥18%
Hardness Not specified 248-302 HB
Condition Not specified Hardened and tempered T, ruling section 6 in (lowest-strength condition of the standard)
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 EN25
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for T to Z (55/65 to 100 tons/sq in) according to ruling section.
Key Differences
Can BS 970 (Part 1) 826M31 Be Substituted With BS 970 EN25?
BS 970 (Part 1) 826M31 and BS 970 EN25 overlap closely enough on chemistry and mechanical properties that BS 970 EN25 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.
On M-EX Right Now
BS 970 (Part 1) 826M31
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BS 970 EN25
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 826M31 and BS 970 EN25?
BS 970 EN25 specifies Si which is not specified for BS 970 (Part 1) 826M31.
Can BS 970 (Part 1) 826M31 be substituted with BS 970 EN25?
BS 970 (Part 1) 826M31 and BS 970 EN25 overlap closely enough on chemistry and mechanical properties that BS 970 EN25 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.