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BS 970 (Part 1) 185H40 vs BS 970 (Part 1) 708M40

Close Alternative — 70.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 185H40 (BS 970 (Part 1):1991) and BS 970 (Part 1) 708M40 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 185H40 is typically used for through hardening boron steel (section three), while BS 970 (Part 1) 708M40 is commonly used for used for axles, gears, shafts, studs, crankshafts, and heavy-duty machinery parts.. BS 970 (Part 1) 185H40 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 708M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 185H40 vs BS 970 (Part 1) 708M40 is a 70.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 70.6%.

Frequently Compared With BS 970 (Part 1) 185H40:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
70.6%
MECHANICAL MATCH
No shared data
OVERALL
70.6%
Specifications
Property BS 970 (Part 1) 185H40 BS 970 (Part 1) 708M40
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.36-0.45 0.36-0.44
Mn (%) 1.25-1.75 0.70-1.00
Cr (%) 0.15-0.35 0.90-1.20
Mo (%) 0.08-0.18 0.15-0.25
B (%) 0.0005-0.005 Not specified
S (%) 0.03-0.06 Not specified
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) 185H40
Through hardening boron steel (section three)
BS 970 (Part 1) 708M40
Used for axles, gears, shafts, studs, crankshafts, and heavy-duty machinery parts.
Key Differences
Can BS 970 (Part 1) 185H40 Be Substituted With BS 970 (Part 1) 708M40?
BS 970 (Part 1) 185H40 and BS 970 (Part 1) 708M40 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 185H40
No active listings currently.
BS 970 (Part 1) 708M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–6000 mm (224.41–236.22 in)
On M-EX Right Now
BS 970 (Part 1) 185H40
0 active listings and RFQs →
BS 970 (Part 1) 708M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 185H40 and BS 970 (Part 1) 708M40?
BS 970 (Part 1) 185H40 specifies B, S which are not specified for BS 970 (Part 1) 708M40.
Can BS 970 (Part 1) 185H40 be substituted with BS 970 (Part 1) 708M40?
BS 970 (Part 1) 185H40 and BS 970 (Part 1) 708M40 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.