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BS 970 (Part 1) 170H20 vs IS 11169 (Part 1) 21C10BT

Strong Match — 88.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 170H20 (BS 970 (Part 1):1983) and IS 11169 (Part 1) 21C10BT (IS 11169 (Part 1):1984) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 170H20 is typically used for through hardening steel for mechanical and allied engineering purposes (table 6 gives composition only; see the hardenability tables)., while IS 11169 (Part 1) 21C10BT is commonly used for cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1). BS 970 (Part 1) 170H20 is defined under British Standards (BS), originating from United Kingdom, while IS 11169 (Part 1) 21C10BT is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 170H20 vs IS 11169 (Part 1) 21C10BT is a 88.9% 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 88.9%.

Frequently Compared With BS 970 (Part 1) 170H20:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
No shared data
OVERALL
88.9%
Specifications
Property BS 970 (Part 1) 170H20 IS 11169 (Part 1) 21C10BT
Standard BS 970 (Part 1):1983 IS 11169 (Part 1):1984
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.18-0.23
Mn (%) 0.80-1.10 0.8-1.1
B (%) 0.0005-0.005 0.0005-0.003
P (%) <=0.035 Not specified
S (%) <=0.040 Not specified
Si (%) Not specified 0.15-0.30
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 (Part 1) 170H20 IS 11169 (Part 1) 21C10BT
Hardness, annealed Not specified <=160 HB
Typical Applications
BS 970 (Part 1) 170H20
Through hardening steel for mechanical and allied engineering purposes (Table 6 gives composition only; see the hardenability tables).
IS 11169 (Part 1) 21C10BT
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Key Differences
Can BS 970 (Part 1) 170H20 Be Substituted With IS 11169 (Part 1) 21C10BT?
BS 970 (Part 1) 170H20 and IS 11169 (Part 1) 21C10BT overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 21C10BT is often considered as a substitute for BS 970 (Part 1) 170H20 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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BS 970 (Part 1) 170H20
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IS 11169 (Part 1) 21C10BT
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 170H20 and IS 11169 (Part 1) 21C10BT?
BS 970 (Part 1) 170H20 specifies P, S which are not specified for IS 11169 (Part 1) 21C10BT. IS 11169 (Part 1) 21C10BT specifies Si which is not specified for BS 970 (Part 1) 170H20.
Can BS 970 (Part 1) 170H20 be substituted with IS 11169 (Part 1) 21C10BT?
BS 970 (Part 1) 170H20 and IS 11169 (Part 1) 21C10BT overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 21C10BT is often considered as a substitute for BS 970 (Part 1) 170H20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.