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BS 970 (Part 1) 708A37 vs SAE J404 4137

Strong Match — 89.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 708A37 (BS 970 (Part 1):1983) and SAE J404 4137 (SAE J404:2000) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 708A37 is typically used for used for gears, shafts, studs, machine spindles, crankshafts, and automotive components., while SAE J404 4137 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. BS 970 (Part 1) 708A37 is defined under British Standards (BS), originating from United Kingdom, while SAE J404 4137 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 (Part 1) 708A37 vs SAE J404 4137 is a 89.6% 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 89.6%.

Frequently Compared With BS 970 (Part 1) 708A37:
UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
89.6%
MECHANICAL MATCH
No shared data
OVERALL
89.6%
Specifications
Property BS 970 (Part 1) 708A37 SAE J404 4137
Standard BS 970 (Part 1):1983 SAE J404:2000
Category Alloy Steel Alloy Steel
C (%) 0.35-0.40 0.35-0.40
Mn (%) 0.70-0.90 0.70-0.90
P (%) <=0.035 <=0.030
S (%) <=0.040 <=0.040
Cr (%) 0.90-1.20 0.80-1.10
Mo (%) 0.15-0.25 0.15-0.25
Si (%) Not specified 0.15-0.35
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) 708A37
Used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.
SAE J404 4137
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can BS 970 (Part 1) 708A37 Be Substituted With SAE J404 4137?
BS 970 (Part 1) 708A37 and SAE J404 4137 overlap closely enough on chemistry and mechanical properties that SAE J404 4137 is often considered as a substitute for BS 970 (Part 1) 708A37 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 1) 708A37
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
SAE J404 4137
No active listings currently.
On M-EX Right Now
BS 970 (Part 1) 708A37
2 active listings and RFQs →
SAE J404 4137
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 708A37 and SAE J404 4137?
SAE J404 4137 specifies Si which is not specified for BS 970 (Part 1) 708A37.
Can BS 970 (Part 1) 708A37 be substituted with SAE J404 4137?
BS 970 (Part 1) 708A37 and SAE J404 4137 overlap closely enough on chemistry and mechanical properties that SAE J404 4137 is often considered as a substitute for BS 970 (Part 1) 708A37 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.