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BS 970 (Part 3) 708M40 vs BS 970 (Part 1) 708M40

Strong Match — 92.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 708M40 (BS 970 (Part 3):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 3) 708M40 is typically 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), 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 3) 708M40 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 3) 708M40 vs BS 970 (Part 1) 708M40 is a 92.9% 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 92.9%.

Frequently Compared With BS 970 (Part 3) 708M40:
IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 12Cr4Mo2 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
No shared data
OVERALL
92.9%
Specifications
Property BS 970 (Part 3) 708M40 BS 970 (Part 1) 708M40
Standard BS 970 (Part 3):1991 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.36-0.44
Si (%) 0.10-0.40 Not specified
Mn (%) 0.70-1.00 0.70-1.00
P (%) <=0.035 Not specified
S (%) <=0.040 Not specified
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.25 0.15-0.25
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 3) 708M40
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) 708M40
Used for axles, gears, shafts, studs, crankshafts, and heavy-duty machinery parts.
Key Differences
Can BS 970 (Part 3) 708M40 Be Substituted With BS 970 (Part 1) 708M40?
BS 970 (Part 3) 708M40 and BS 970 (Part 1) 708M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 708M40 is often considered as a substitute for BS 970 (Part 3) 708M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
BS 970 (Part 3) 708M40
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 3) 708M40
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 3) 708M40 and BS 970 (Part 1) 708M40?
BS 970 (Part 3) 708M40 specifies Si, P, S which are not specified for BS 970 (Part 1) 708M40.
Can BS 970 (Part 3) 708M40 be substituted with BS 970 (Part 1) 708M40?
BS 970 (Part 3) 708M40 and BS 970 (Part 1) 708M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 708M40 is often considered as a substitute for BS 970 (Part 3) 708M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.