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IS 1875 Class 3 vs BS 970 EN5B

Strong Match — 90% match based on chemical composition and mechanical property overlap.

IS 1875 Class 3 (IS 1875:1992) and BS 970 EN5B (BS 970:1955) are both steel grades. Both fall under the Carbon Steel category. IS 1875 Class 3 is typically used for billets, blooms, slabs and bars for general engineering forgings, while BS 970 EN5B is commonly used for mechanical properties are not part of the contractual obligations of specifications en 5a, en 5b and en 5c.. IS 1875 Class 3 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN5B is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1875 Class 3 vs BS 970 EN5B is a 90% 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 90%.

Frequently Compared With IS 1875 Class 3:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
90%
MECHANICAL MATCH
No shared data
OVERALL
90%
Specifications
Property IS 1875 Class 3 BS 970 EN5B
Standard IS 1875:1992 BS 970:1955
Category Carbon Steel Carbon Steel
C (%) 0.25-0.35 0.28-0.33
Si (%) 0.15-0.35 0.05-0.35
Mn (%) 0.60-0.90 0.70-0.90
S (%) <=0.04 <=0.060
P (%) <=0.04 <=0.060
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1875 Class 3 BS 970 EN5B
Tensile Strength 490 MPa min Not specified
Yield Strength 270 MPa min Not specified
Elongation >=21% Not specified
Hardness 140 HB min Not specified
Condition as rolled or as forged and normalised, ruling section up to 100 mm Not specified
Normalising Temperature 860-890 °C (for information) Not specified
Bend Test (if ordered) 32 mm square test piece bent round a 44 mm former without fracture Not specified
Typical Applications
IS 1875 Class 3
Billets, blooms, slabs and bars for general engineering forgings
BS 970 EN5B
Mechanical properties are not part of the contractual obligations of specifications En 5A, En 5B and En 5C.
Can IS 1875 Class 3 Be Substituted With BS 970 EN5B?
IS 1875 Class 3 and BS 970 EN5B overlap closely enough on chemistry and mechanical properties that BS 970 EN5B is often considered as a substitute for IS 1875 Class 3 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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IS 1875 Class 3
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BS 970 EN5B
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Frequently Asked Questions
What is the difference between IS 1875 Class 3 and BS 970 EN5B?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1875 Class 3 be substituted with BS 970 EN5B?
IS 1875 Class 3 and BS 970 EN5B overlap closely enough on chemistry and mechanical properties that BS 970 EN5B is often considered as a substitute for IS 1875 Class 3 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.