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IS 1570 (Part 4) 103Cr4 vs BS 970 EN31

Strong Match — 85.6% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 103Cr4 (IS 1570 (Part 4):1988) and BS 970 EN31 (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 103Cr4 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 103Cr4 vs BS 970 EN31 is a 85.6% 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 85.6%.

Frequently Compared With IS 1570 (Part 4) 103Cr4:
GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 7) 12Cr4Mo5H
Match Breakdown
CHEMISTRY MATCH
85.6%
MECHANICAL MATCH
No shared data
OVERALL
85.6%
Specifications
Property IS 1570 (Part 4) 103Cr4 BS 970 EN31
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.95-1.10 0.90-1.20
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.25-0.45 0.30-0.75
Cr (%) 0.90-1.20 1.00-1.60
S (%) Not specified <=0.050
P (%) Not specified <=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 IS 1570 (Part 4) 103Cr4 BS 970 EN31
Hardness (HB) Not specified ≤229 (softened)
Typical Applications
IS 1570 (Part 4) 103Cr4
Not documented
BS 970 EN31
Ball and roller bearings, gauges, dies
Key Differences
Can IS 1570 (Part 4) 103Cr4 Be Substituted With BS 970 EN31?
IS 1570 (Part 4) 103Cr4 and BS 970 EN31 overlap closely enough on chemistry and mechanical properties that BS 970 EN31 is often considered as a substitute for IS 1570 (Part 4) 103Cr4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 103Cr4
No active listings currently.
BS 970 EN31
Round Bar → (23 listings)
Diameter: 40–50 mm (1.57–1.97 in)
Length: 2500–7000 mm (98.43–275.59 in)
Hex Bar → (3 listings)
Across Flats: 50–50 mm (1.97–1.97 in)
Length: 2600–3300 mm (102.36–129.92 in)
Flat Bar → (3 listings)
Thickness: 25–25 mm (0.98–0.98 in)
Width: 120–120 mm (4.72–4.72 in)
Length: 2500–3600 mm (98.43–141.73 in)
On M-EX Right Now
IS 1570 (Part 4) 103Cr4
0 active listings and RFQs →
BS 970 EN31
29 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 103Cr4 and BS 970 EN31?
BS 970 EN31 specifies S, P which are not specified for IS 1570 (Part 4) 103Cr4.
Can IS 1570 (Part 4) 103Cr4 be substituted with BS 970 EN31?
IS 1570 (Part 4) 103Cr4 and BS 970 EN31 overlap closely enough on chemistry and mechanical properties that BS 970 EN31 is often considered as a substitute for IS 1570 (Part 4) 103Cr4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.