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

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

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

As per chemical composition, SAE J404 E52100 vs BS 970 (Part 1) 535A99 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 SAE J404 E52100:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
83.5%
MECHANICAL MATCH
No shared data
OVERALL
83.5%
Specifications
Property SAE J404 E52100 BS 970 (Part 1) 535A99
Standard SAE J404:2009 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.98-1.10 0.95-1.10
Cr (%) 1.30-1.60 1.20-1.60
Mn (%) 0.25-0.45 0.40-0.70
P (%) <=0.025 <=0.035
S (%) <=0.025 <=0.040
Si (%) 0.15-0.35 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
SAE J404 E52100
Chemistry-only alloy steel grade; see the composition notes for product scope
BS 970 (Part 1) 535A99
Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.
Key Differences
Can SAE J404 E52100 Be Substituted With BS 970 (Part 1) 535A99?
SAE J404 E52100 and BS 970 (Part 1) 535A99 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
SAE J404 E52100
No active listings currently.
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)
On M-EX Right Now
SAE J404 E52100
0 active listings and RFQs →
BS 970 (Part 1) 535A99
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between SAE J404 E52100 and BS 970 (Part 1) 535A99?
SAE J404 E52100 specifies Si which is not specified for BS 970 (Part 1) 535A99.
Can SAE J404 E52100 be substituted with BS 970 (Part 1) 535A99?
SAE J404 E52100 and BS 970 (Part 1) 535A99 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.