Post Stock Login Register

BS 970 EN30A vs BS 970 EN111A

Related Material — 69.3% match based on chemical composition and mechanical property overlap.

BS 970 EN30A (BS 970:1955) and BS 970 EN111A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN30A is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN111A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN30A vs BS 970 EN111A is a 69.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.3%.

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
69.3%
MECHANICAL MATCH
No shared data
OVERALL
69.3%
Specifications
Property BS 970 EN30A BS 970 EN111A
Standard BS 970:1955 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.33-0.38
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.60 0.60-0.90
Ni (%) 3.90-4.30 1.00-1.50
Cr (%) 1.10-1.40 0.45-0.75
S (%) <=0.050 <=0.050
P (%) <=0.050 <=0.050
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 BS 970 EN111A
Tensile Strength ≥1544 MPa (100 tons/sq in, converted) Not specified
Yield Strength ≥1313 MPa (85 tons/sq in, converted) Not specified
Elongation ≥10% Not specified
Hardness 444 HB Not specified
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.
BS 970 EN111A
Not documented
Can BS 970 EN30A Be Substituted With BS 970 EN111A?
BS 970 EN30A and BS 970 EN111A 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)
BS 970 EN111A
No active listings currently.
On M-EX Right Now
BS 970 EN30A
2 active listings and RFQs →
BS 970 EN111A
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN30A and BS 970 EN111A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN30A be substituted with BS 970 EN111A?
BS 970 EN30A and BS 970 EN111A 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.