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

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

UNI 11234 100Cr6 (UNI 11234:2007) and BS 970 (Part 1) 535A99 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. UNI 11234 100Cr6 is typically used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components, 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.. UNI 11234 100Cr6 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy, while BS 970 (Part 1) 535A99 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, UNI 11234 100Cr6 vs BS 970 (Part 1) 535A99 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 UNI 11234 100Cr6:
NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 7) 12Cr2Mo5V2H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 12Cr9Mo10H IS 4367 07Cr4Mo6 IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
80%
MECHANICAL MATCH
No shared data
OVERALL
80%
Specifications
Property UNI 11234 100Cr6 BS 970 (Part 1) 535A99
Standard UNI 11234:2007 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.93-1.05 0.95-1.10
Si (%) 0.15-0.35 Not specified
Mn (%) 0.25-0.45 0.40-0.70
P (%) <=0.025 <=0.035
S (%) <=0.025 <=0.040
Cr (%) 1.35-1.65 1.20-1.60
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property UNI 11234 100Cr6 BS 970 (Part 1) 535A99
Tensile Strength 750-1000 MPa Not specified
Yield Strength 400-600 MPa Not specified
Elongation 10-14 % Not specified
Hardness 60-64 HRC Not specified
Typical Applications
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
BS 970 (Part 1) 535A99
Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.
Key Differences
Can UNI 11234 100Cr6 Be Substituted With BS 970 (Part 1) 535A99?
UNI 11234 100Cr6 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
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)
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
UNI 11234 100Cr6
2 active listings and RFQs →
BS 970 (Part 1) 535A99
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between UNI 11234 100Cr6 and BS 970 (Part 1) 535A99?
UNI 11234 100Cr6 specifies Si which is not specified for BS 970 (Part 1) 535A99.
Can UNI 11234 100Cr6 be substituted with BS 970 (Part 1) 535A99?
UNI 11234 100Cr6 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.