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BS 970 EN30A vs UNI 11234 100Cr6

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

BS 970 EN30A (BS 970:1955) and UNI 11234 100Cr6 (UNI 11234:2007) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN30A is typically used for used for gears, aircraft components, transmission shafts, heavy-duty pinions, crankshafts, and high-strength fasteners., while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. BS 970 EN30A 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 EN30A vs UNI 11234 100Cr6 is a 66.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 970 EN30A:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr4 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
66.2%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property BS 970 EN30A UNI 11234 100Cr6
Standard BS 970:1955 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.93-1.05
Si (%) 0.10-0.35 0.15-0.35
Mn (%) 0.40-0.60 0.25-0.45
Ni (%) 3.90-4.30 Not specified
Cr (%) 1.10-1.40 1.35-1.65
S (%) <=0.050 <=0.025
P (%) <=0.050 <=0.025
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 EN30A UNI 11234 100Cr6
Tensile Strength ≥1544 MPa (100 tons/sq in, converted) 750-1000 MPa
Yield Strength ≥1313 MPa (85 tons/sq in, converted) 400-600 MPa
Elongation ≥10% 10-14 %
Hardness 444 HB 60-64 HRC
Condition Air hardened and tempered (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN30A
Used for gears, aircraft components, transmission shafts, heavy-duty pinions, crankshafts, and high-strength fasteners.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can BS 970 EN30A Be Substituted With UNI 11234 100Cr6?
BS 970 EN30A and UNI 11234 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
BS 970 EN30A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6400–6600 mm (251.97–259.84 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 EN30A
2 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN30A and UNI 11234 100Cr6?
BS 970 EN30A specifies Ni which is not specified for UNI 11234 100Cr6.
Can BS 970 EN30A be substituted with UNI 11234 100Cr6?
BS 970 EN30A and UNI 11234 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.