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

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

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

As per chemical composition, IS 11169 (Part 1) 21C10BT vs BS 970 (Part 1) 170H20 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 IS 11169 (Part 1) 21C10BT:
UNI 11234 100Cr6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
No shared data
OVERALL
88.9%
Specifications
Property IS 11169 (Part 1) 21C10BT BS 970 (Part 1) 170H20
Standard IS 11169 (Part 1):1984 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.17-0.23
Mn (%) 0.8-1.1 0.80-1.10
Si (%) 0.15-0.30 Not specified
B (%) 0.0005-0.003 0.0005-0.005
P (%) Not specified <=0.035
S (%) Not specified <=0.040
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 11169 (Part 1) 21C10BT BS 970 (Part 1) 170H20
Hardness, annealed <=160 HB Not specified
Typical Applications
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)
BS 970 (Part 1) 170H20
Through hardening steel for mechanical and allied engineering purposes (Table 6 gives composition only; see the hardenability tables).
Key Differences
Can IS 11169 (Part 1) 21C10BT Be Substituted With BS 970 (Part 1) 170H20?
IS 11169 (Part 1) 21C10BT and BS 970 (Part 1) 170H20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 170H20 is often considered as a substitute for IS 11169 (Part 1) 21C10BT 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
IS 11169 (Part 1) 21C10BT
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BS 970 (Part 1) 170H20
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Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 21C10BT and BS 970 (Part 1) 170H20?
IS 11169 (Part 1) 21C10BT specifies Si which is not specified for BS 970 (Part 1) 170H20. BS 970 (Part 1) 170H20 specifies P, S which are not specified for IS 11169 (Part 1) 21C10BT.
Can IS 11169 (Part 1) 21C10BT be substituted with BS 970 (Part 1) 170H20?
IS 11169 (Part 1) 21C10BT and BS 970 (Part 1) 170H20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 170H20 is often considered as a substitute for IS 11169 (Part 1) 21C10BT in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.