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BS 970 EN31 vs IS 1570 (Part 4) 105Cr5

Strong Match — 98.3% match based on chemical composition and mechanical property overlap.

BS 970 EN31 (BS 970:1955) and IS 1570 (Part 4) 105Cr5 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN31 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 4) 105Cr5 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 EN31 vs IS 1570 (Part 4) 105Cr5 is a 98.3% 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 98.3%.

Frequently Compared With BS 970 EN31:
UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 GOST 4543 12HN3A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
98.3%
MECHANICAL MATCH
No shared data
OVERALL
98.3%
Specifications
Property BS 970 EN31 IS 1570 (Part 4) 105Cr5
Standard BS 970:1955 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.90-1.20 0.90-1.20
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.30-0.75 0.40-0.80
Cr (%) 1.00-1.60 1.00-1.60
S (%) <=0.050 Not specified
P (%) <=0.050 Not specified
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 EN31 IS 1570 (Part 4) 105Cr5
Hardness (HB) ≤229 (softened) Not specified
Typical Applications
BS 970 EN31
Ball and roller bearings, gauges, dies
IS 1570 (Part 4) 105Cr5
Not documented
Key Differences
Can BS 970 EN31 Be Substituted With IS 1570 (Part 4) 105Cr5?
BS 970 EN31 and IS 1570 (Part 4) 105Cr5 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 105Cr5 is often considered as a substitute for BS 970 EN31 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
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)
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)
Hex Bar → (3 listings)
Across Flats: 50–50 mm (1.97–1.97 in)
Length: 2600–3300 mm (102.36–129.92 in)
IS 1570 (Part 4) 105Cr5
No active listings currently.
On M-EX Right Now
BS 970 EN31
29 active listings and RFQs →
IS 1570 (Part 4) 105Cr5
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN31 and IS 1570 (Part 4) 105Cr5?
BS 970 EN31 specifies S, P which are not specified for IS 1570 (Part 4) 105Cr5.
Can BS 970 EN31 be substituted with IS 1570 (Part 4) 105Cr5?
BS 970 EN31 and IS 1570 (Part 4) 105Cr5 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 105Cr5 is often considered as a substitute for BS 970 EN31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.