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IS 5517 45CrSi9 vs BS 970 (Part 1) 535A99

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

IS 5517 45CrSi9 (IS 5517:1993) and BS 970 (Part 1) 535A99 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. IS 5517 45CrSi9 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 535A99 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 5517 45CrSi9 vs BS 970 (Part 1) 535A99 is a 73.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With IS 5517 45CrSi9:
IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
73.9%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property IS 5517 45CrSi9 BS 970 (Part 1) 535A99
Standard IS 5517:1993 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.40-0.50 0.95-1.10
Si (%) 2.75-3.25 Not specified
Mn (%) 0.30-0.60 0.40-0.70
Cr (%) 8.50-9.50 1.20-1.60
S (%) <=0.035 <=0.040
P (%) <=0.035 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 5517 45CrSi9 BS 970 (Part 1) 535A99
Tensile Strength 880-1030 MPa Not specified
Yield Strength (0.2% proof) 685 MPa min Not specified
Elongation >=10% Not specified
Hardness (annealed) <=240 HB Not specified
Condition Hardened and tempered Not specified
Typical Applications
IS 5517 45CrSi9
Not documented
BS 970 (Part 1) 535A99
Used for aircraft fittings, gears, high-strength shafts, crankshafts, heavy-duty fasteners, and transmission parts.
Key Differences
Can IS 5517 45CrSi9 Be Substituted With BS 970 (Part 1) 535A99?
IS 5517 45CrSi9 and BS 970 (Part 1) 535A99 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
IS 5517 45CrSi9
No active listings currently.
BS 970 (Part 1) 535A99
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–6400 mm (204.72–251.97 in)
On M-EX Right Now
IS 5517 45CrSi9
0 active listings and RFQs →
BS 970 (Part 1) 535A99
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 5517 45CrSi9 and BS 970 (Part 1) 535A99?
IS 5517 45CrSi9 specifies Si which is not specified for BS 970 (Part 1) 535A99.
Can IS 5517 45CrSi9 be substituted with BS 970 (Part 1) 535A99?
IS 5517 45CrSi9 and BS 970 (Part 1) 535A99 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.