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BS 970 EN30B vs BS 970 (Part 1) 835M30

Strong Match — 86.4% match based on chemical composition and mechanical property overlap.

BS 970 EN30B (BS 970:1955) and BS 970 (Part 1) 835M30 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN30B is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 835M30 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN30B vs BS 970 (Part 1) 835M30 is a 86.4% 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 86.4%.

Frequently Compared With BS 970 EN30B:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
86.4%
MECHANICAL MATCH
No shared data
OVERALL
86.4%
Specifications
Property BS 970 EN30B BS 970 (Part 1) 835M30
Standard BS 970:1955 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.26-0.34
Si (%) 0.10-0.35 Not specified
Mn (%) 0.40-0.60 0.45-0.70
Ni (%) 3.90-4.30 3.90-4.30
Cr (%) 1.10-1.40 1.10-1.40
Mo (%) 0.20-0.40 0.20-0.35
S (%) <=0.050 <=0.025
P (%) <=0.050 <=0.025
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 EN30B BS 970 (Part 1) 835M30
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 EN30B
Not documented
BS 970 (Part 1) 835M30
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can BS 970 EN30B Be Substituted With BS 970 (Part 1) 835M30?
BS 970 EN30B and BS 970 (Part 1) 835M30 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 835M30 is often considered as a substitute for BS 970 EN30B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
On M-EX Right Now
BS 970 EN30B
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BS 970 (Part 1) 835M30
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Frequently Asked Questions
What is the difference between BS 970 EN30B and BS 970 (Part 1) 835M30?
BS 970 EN30B specifies Si which is not specified for BS 970 (Part 1) 835M30.
Can BS 970 EN30B be substituted with BS 970 (Part 1) 835M30?
BS 970 EN30B and BS 970 (Part 1) 835M30 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 835M30 is often considered as a substitute for BS 970 EN30B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.