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BS 970 EN21 vs UNI 11234 100Cr6

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

BS 970 EN21 (BS 970:1955) and UNI 11234 100Cr6 (UNI 11234:2007) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN21 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for 45/55 (r) and 50/60 (s) tons/sq in according to ruling section., while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. BS 970 EN21 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 EN21 vs UNI 11234 100Cr6 is a 65.7% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With BS 970 EN21:
IS 1570 (Part 7) 10Cr36Mo10H NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property BS 970 EN21 UNI 11234 100Cr6
Standard BS 970:1955 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.25-0.35 0.93-1.05
Si (%) 0.10-0.35 0.15-0.35
Mn (%) 0.35-0.75 0.25-0.45
Ni (%) 2.75-3.25 Not specified
Cr (%) <=0.30 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 EN21 UNI 11234 100Cr6
Tensile Strength ≥695 MPa (45 tons/sq in, converted) 750-1000 MPa
Yield Strength ≥494 MPa (32 tons/sq in, converted) 400-600 MPa
Elongation ≥22% 10-14 %
Hardness 201-255 HB 60-64 HRC
Condition Hardened and tempered R, ruling section 4 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN21
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 45/55 (R) and 50/60 (S) tons/sq in according to ruling section.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can BS 970 EN21 Be Substituted With UNI 11234 100Cr6?
BS 970 EN21 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 EN21
No active listings currently.
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 EN21
0 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN21 and UNI 11234 100Cr6?
BS 970 EN21 specifies Ni which is not specified for UNI 11234 100Cr6.
Can BS 970 EN21 be substituted with UNI 11234 100Cr6?
BS 970 EN21 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.