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BS 970 (Part 3) 420S37 vs BS 970 EN56D

Strong Match — 92.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 420S37 (BS 970 (Part 3):1991) and BS 970 EN56D (BS 970:1955) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 3) 420S37 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN56D is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 3) 420S37 vs BS 970 EN56D is a 92.1% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 92.1%.

Frequently Compared With BS 970 (Part 3) 420S37:
IS 1570 (Part 7) 12Cr13H EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoVH ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
92.1%
MECHANICAL MATCH
No shared data
OVERALL
92.1%
Specifications
Property BS 970 (Part 3) 420S37 BS 970 EN56D
Standard BS 970 (Part 3):1991 BS 970:1955
Category Stainless Steel Stainless Steel
C (%) 0.20-0.28 0.25-0.35
Si (%) <=1.0 <=1.00
Mn (%) <=1.0 <=1.00
P (%) <=0.040 <=0.045
S (%) <=0.030 <=0.045
Cr (%) 12.0-14.0 12.0-14.0
Ni (%) <=1.00 <=1.00
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 (Part 3) 420S37 BS 970 EN56D
Tensile Strength Not specified ≥541 MPa (35 tons/sq in, converted)
Yield Strength Not specified ≥386 MPa (25 tons/sq in, converted)
Elongation Not specified ≥25%
Hardness Not specified 152-207 HB
Condition Not specified Hardened and tempered P (ruling 6), ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 (Part 3) 420S37
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
BS 970 EN56D
Not documented
Can BS 970 (Part 3) 420S37 Be Substituted With BS 970 EN56D?
BS 970 (Part 3) 420S37 and BS 970 EN56D overlap closely enough on chemistry and mechanical properties that BS 970 EN56D is often considered as a substitute for BS 970 (Part 3) 420S37 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 (Part 3) 420S37
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BS 970 EN56D
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Frequently Asked Questions
What is the difference between BS 970 (Part 3) 420S37 and BS 970 EN56D?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 420S37 be substituted with BS 970 EN56D?
BS 970 (Part 3) 420S37 and BS 970 EN56D overlap closely enough on chemistry and mechanical properties that BS 970 EN56D is often considered as a substitute for BS 970 (Part 3) 420S37 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.