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BS 970 EN353 vs BS 970 (Part 1) 815H17

Close Alternative — 73.8% match based on chemical composition and mechanical property overlap.

BS 970 EN353 (BS 970:1955) and BS 970 (Part 1) 815H17 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN353 is typically used for heavily loaded gears, cams, camshafts, while BS 970 (Part 1) 815H17 is commonly used for case hardening steel supplied to specified hardenability limits (end quench test, table 10).. BS 970 EN353 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 815H17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN353 vs BS 970 (Part 1) 815H17 is a 73.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 73.8%.

Frequently Compared With BS 970 EN353:
UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
73.8%
MECHANICAL MATCH
No shared data
OVERALL
73.8%
Specifications
Property BS 970 EN353 BS 970 (Part 1) 815H17
Standard BS 970:1955 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) <=0.20 0.14-0.20
Si (%) <=0.35 Not specified
Mn (%) 0.50-1.00 0.60-0.90
Ni (%) 1.00-1.50 1.20-1.70
Cr (%) 0.75-1.25 0.80-1.20
Mo (%) 0.08-0.15 0.10-0.20
S (%) <=0.050 <=0.040
P (%) <=0.050 <=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 BS 970 EN353 BS 970 (Part 1) 815H17
Tensile Strength ≥1004 MPa (65 tons/sq in, converted) Not specified
Elongation ≥12% Not specified
Condition core, min (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN353
Heavily loaded gears, cams, camshafts
BS 970 (Part 1) 815H17
Case hardening steel supplied to specified hardenability limits (end quench test, Table 10).
Key Differences
Can BS 970 EN353 Be Substituted With BS 970 (Part 1) 815H17?
BS 970 EN353 and BS 970 (Part 1) 815H17 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
BS 970 EN353
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–6300 mm (204.72–248.03 in)
BS 970 (Part 1) 815H17
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On M-EX Right Now
BS 970 EN353
3 active listings and RFQs →
BS 970 (Part 1) 815H17
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN353 and BS 970 (Part 1) 815H17?
BS 970 EN353 specifies Si which is not specified for BS 970 (Part 1) 815H17.
Can BS 970 EN353 be substituted with BS 970 (Part 1) 815H17?
BS 970 EN353 and BS 970 (Part 1) 815H17 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.