Post Stock Login Register

BS 970 EN21 vs BS 970 EN111

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 EN21 (BS 970:1955) and BS 970 EN111 (BS 970:1955) 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 BS 970 EN111 is commonly used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for 45/55 (r), 50/60 (s), 55/65 (t), 60/70 (u) tons/sq in according to ruling section.. BS 970 EN21 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN111 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN21 vs BS 970 EN111 is a 73% match. As per mechanical properties, the match is 75%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 970 EN21:
NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 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
Match Breakdown
CHEMISTRY MATCH
73%
MECHANICAL MATCH
75%
OVERALL
69.9%
Specifications
Property BS 970 EN21 BS 970 EN111
Standard BS 970:1955 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.25-0.35 0.30-0.40
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.35-0.75 0.60-0.90
Ni (%) 2.75-3.25 1.00-1.50
Cr (%) <=0.30 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 EN21 BS 970 EN111
Tensile Strength ≥695 MPa (45 tons/sq in, converted) ≥695 MPa (45 tons/sq in, converted)
Yield Strength ≥494 MPa (32 tons/sq in, converted) ≥525 MPa (34 tons/sq in, converted)
Elongation ≥22% ≥22%
Hardness 201-255 HB 201-255 HB
Condition Hardened and tempered R, ruling section 4 in (lowest-strength condition of the standard) Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard)
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.
BS 970 EN111
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 45/55 (R), 50/60 (S), 55/65 (T), 60/70 (U) tons/sq in according to ruling section.
Can BS 970 EN21 Be Substituted With BS 970 EN111?
BS 970 EN21 and BS 970 EN111 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.
On M-EX Right Now
BS 970 EN21
0 active listings and RFQs →
BS 970 EN111
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN21 and BS 970 EN111?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN21 be substituted with BS 970 EN111?
BS 970 EN21 and BS 970 EN111 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.