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BS 970 (Part 1) 535A99 vs UNI 11234 100Cr6

Close Alternative — 80% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 535A99 (BS 970 (Part 1):1983) and UNI 11234 100Cr6 (UNI 11234:2007) 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 UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. BS 970 (Part 1) 535A99 is defined under British Standards (BS), originating from United Kingdom, while UNI 11234 100Cr6 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy.

As per chemical composition, BS 970 (Part 1) 535A99 vs UNI 11234 100Cr6 is a 80% 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 80%.

Frequently Compared With BS 970 (Part 1) 535A99:
NF A35-565 100C6 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 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
80%
MECHANICAL MATCH
No shared data
OVERALL
80%
Specifications
Property BS 970 (Part 1) 535A99 UNI 11234 100Cr6
Standard BS 970 (Part 1):1983 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.95-1.10 0.93-1.05
Mn (%) 0.40-0.70 0.25-0.45
P (%) <=0.035 <=0.025
S (%) <=0.040 <=0.025
Cr (%) 1.20-1.60 1.35-1.65
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.
Mechanical Properties
Property BS 970 (Part 1) 535A99 UNI 11234 100Cr6
Tensile Strength Not specified 750-1000 MPa
Yield Strength Not specified 400-600 MPa
Elongation Not specified 10-14 %
Hardness Not specified 60-64 HRC
Typical Applications
BS 970 (Part 1) 535A99
Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can BS 970 (Part 1) 535A99 Be Substituted With UNI 11234 100Cr6?
BS 970 (Part 1) 535A99 and UNI 11234 100Cr6 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)
UNI 11234 100Cr6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–6800 mm (224.41–267.72 in)
On M-EX Right Now
BS 970 (Part 1) 535A99
2 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 535A99 and UNI 11234 100Cr6?
UNI 11234 100Cr6 specifies Si which is not specified for BS 970 (Part 1) 535A99.
Can BS 970 (Part 1) 535A99 be substituted with UNI 11234 100Cr6?
BS 970 (Part 1) 535A99 and UNI 11234 100Cr6 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.