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BS 970 (Part 1) 535A99 vs SAE J404 E52100

Close Alternative — 83.5% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 535A99 (BS 970 (Part 1):1983) and SAE J404 E52100 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 535A99 is typically used for used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts., while SAE J404 E52100 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. BS 970 (Part 1) 535A99 is defined under British Standards (BS), originating from United Kingdom, while SAE J404 E52100 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 (Part 1) 535A99 vs SAE J404 E52100 is a 83.5% 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 83.5%.

Frequently Compared With BS 970 (Part 1) 535A99:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 07Cr4Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
83.5%
MECHANICAL MATCH
No shared data
OVERALL
83.5%
Specifications
Property BS 970 (Part 1) 535A99 SAE J404 E52100
Standard BS 970 (Part 1):1983 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) 0.95-1.10 0.98-1.10
Mn (%) 0.40-0.70 0.25-0.45
P (%) <=0.035 <=0.025
S (%) <=0.040 <=0.025
Cr (%) 1.20-1.60 1.30-1.60
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) 535A99
Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.
SAE J404 E52100
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can BS 970 (Part 1) 535A99 Be Substituted With SAE J404 E52100?
BS 970 (Part 1) 535A99 and SAE J404 E52100 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) 535A99
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–6400 mm (204.72–251.97 in)
SAE J404 E52100
No active listings currently.
On M-EX Right Now
BS 970 (Part 1) 535A99
2 active listings and RFQs →
SAE J404 E52100
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 535A99 and SAE J404 E52100?
SAE J404 E52100 specifies Si which is not specified for BS 970 (Part 1) 535A99.
Can BS 970 (Part 1) 535A99 be substituted with SAE J404 E52100?
BS 970 (Part 1) 535A99 and SAE J404 E52100 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.