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BS 970 EN55 vs BS 970 EN56D

Related Material — 67% match based on chemical composition and mechanical property overlap.

BS 970 EN55 (BS 970:1955) and BS 970 EN56D (BS 970:1955) are both steel grades. Both fall under the Stainless Steel category. BS 970 EN55 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 EN55 vs BS 970 EN56D is a 67% 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 67%.

Frequently Compared With BS 970 EN55:
ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 08X18H10
Match Breakdown
CHEMISTRY MATCH
67%
MECHANICAL MATCH
No shared data
OVERALL
67%
Specifications
Property BS 970 EN55 BS 970 EN56D
Standard BS 970:1955 BS 970:1955
Category Stainless Steel Stainless Steel
C (%) 0.18-0.45 0.25-0.35
Si (%) 1.00-2.50 <=1.00
Mn (%) <=1.00 <=1.00
Ni (%) 6.00-12.0 <=1.00
Cr (%) >=17.0 12.0-14.0
W (%) 2.00-4.00 Not specified
S (%) <=0.045 <=0.045
P (%) <=0.045 <=0.045
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 EN55 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 EN55
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars.
BS 970 EN56D
Not documented
Key Differences
Can BS 970 EN55 Be Substituted With BS 970 EN56D?
BS 970 EN55 and BS 970 EN56D 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.
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BS 970 EN55
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BS 970 EN56D
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Frequently Asked Questions
What is the difference between BS 970 EN55 and BS 970 EN56D?
BS 970 EN55 specifies W which is not specified for BS 970 EN56D.
Can BS 970 EN55 be substituted with BS 970 EN56D?
BS 970 EN55 and BS 970 EN56D 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.