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ASTM A681 P2 vs BS 970 (Part 3) 817M40

Related Material — 65% match based on chemical composition and mechanical property overlap.

ASTM A681 P2 (ASTM A681:2008) and BS 970 (Part 3) 817M40 (BS 970 (Part 3):1991) are both steel grades. ASTM A681 P2 is classified under Tool & Die Steels, while BS 970 (Part 3) 817M40 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. ASTM A681 P2 is typically used for injection mould cavities, die casting dies for zinc, while BS 970 (Part 3) 817M40 is commonly used for high tensile shafts, gears, crankshafts. ASTM A681 P2 is defined under ASTM International, originating from United States, while BS 970 (Part 3) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A681 P2 vs BS 970 (Part 3) 817M40 is a 69.1% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 65%.

Frequently Compared With ASTM A681 P2:
EN ISO 4957 1.2316 DIN EN ISO 4957 1.2379 EN ISO 683-17 100Cr6 GOST 5950 3H2W8F GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2344 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS1 GOST 5950 4H5MFS AISI 52100 IS 3748 103T3
Match Breakdown
CHEMISTRY MATCH
69.1%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property ASTM A681 P2 BS 970 (Part 3) 817M40
Standard ASTM A681:2008 BS 970 (Part 3):1991
Category Tool & Die Steels Alloy Steel
C (%) <=0.10 0.36-0.44
Mn (%) 0.10-0.40 0.45-0.70
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.040
Si (%) 0.10-0.40 0.10-0.40
Cr (%) 0.75-1.25 1.00-1.40
Mo (%) 0.15-0.40 0.20-0.35
Ni (%) 0.10-0.50 1.30-1.70
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A681 P2 BS 970 (Part 3) 817M40
Hardness <=100 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Typical Applications
ASTM A681 P2
Injection mould cavities, die casting dies for zinc
BS 970 (Part 3) 817M40
High tensile shafts, gears, crankshafts
Key Differences
Can ASTM A681 P2 Be Substituted With BS 970 (Part 3) 817M40?
ASTM A681 P2 and BS 970 (Part 3) 817M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
ASTM A681 P2
Round Bar → (3 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 2700–3900 mm (106.3–153.54 in)
BS 970 (Part 3) 817M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6200–6500 mm (244.09–255.91 in)
On M-EX Right Now
ASTM A681 P2
3 active listings and RFQs →
BS 970 (Part 3) 817M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 P2 and BS 970 (Part 3) 817M40?
Different category: ASTM A681 P2 is Tool & Die Steels, BS 970 (Part 3) 817M40 is Alloy Steel.
Can ASTM A681 P2 be substituted with BS 970 (Part 3) 817M40?
ASTM A681 P2 and BS 970 (Part 3) 817M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.