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BS 970 EN30A vs EN 10028-2 10CrMo9-10

Minimal Match — 34.3% match based on chemical composition and mechanical property overlap.

BS 970 EN30A (BS 970:1955) and EN 10028-2 10CrMo9-10 (EN 10028-2:2017) 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 EN 10028-2 10CrMo9-10 is commonly used for flat products for pressure purposes. BS 970 EN30A is defined under British Standards (BS), originating from United Kingdom, while EN 10028-2 10CrMo9-10 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 EN30A vs EN 10028-2 10CrMo9-10 is a 51.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 34.3%.

Frequently Compared With BS 970 EN30A:
UNI 11234 100Cr6 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 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
51.4%
MECHANICAL MATCH
0%
OVERALL
34.3%
Specifications
Property BS 970 EN30A EN 10028-2 10CrMo9-10
Standard BS 970:1955 EN 10028-2:2017
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.08-0.14
Si (%) 0.10-0.35 <=0.50
Mn (%) 0.40-0.60 0.40-0.80
Ni (%) 3.90-4.30 Not specified
Cr (%) 1.10-1.40 2.00-2.50
S (%) <=0.050 <=0.010
P (%) <=0.050 <=0.020
N (%) Not specified <=0.012
Cu (%) Not specified <=0.30
Mo (%) Not specified 0.90-1.10
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 EN 10028-2 10CrMo9-10
Tensile Strength ≥1544 MPa (100 tons/sq in, converted) 480-630 MPa
Yield Strength ≥1313 MPa (85 tons/sq in, converted) >=310 MPa
Elongation ≥10% >=18%
Hardness 444 HB Not specified
Condition Air hardened and tempered (lowest-strength condition of the standard) Usual delivery condition normalized and tempered (+NT), nominal thickness up to 16 mm; transverse direction, Yield Strength is ReH, Elongation is A
Typical Applications
BS 970 EN30A
Used for gears, aircraft components, transmission shafts, heavy-duty pinions, crankshafts, and high-strength fasteners.
EN 10028-2 10CrMo9-10
Flat products for pressure purposes
Key Differences
Can BS 970 EN30A Be Substituted With EN 10028-2 10CrMo9-10?
BS 970 EN30A and EN 10028-2 10CrMo9-10 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)
EN 10028-2 10CrMo9-10
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On M-EX Right Now
BS 970 EN30A
2 active listings and RFQs →
EN 10028-2 10CrMo9-10
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN30A and EN 10028-2 10CrMo9-10?
BS 970 EN30A specifies Ni which is not specified for EN 10028-2 10CrMo9-10. EN 10028-2 10CrMo9-10 specifies N, Cu, Mo which are not specified for BS 970 EN30A.
Can BS 970 EN30A be substituted with EN 10028-2 10CrMo9-10?
BS 970 EN30A and EN 10028-2 10CrMo9-10 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.