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CSA G40.21 350WT vs BS 970 (Part 1) 170H20

Close Alternative — 81.7% match based on chemical composition and mechanical property overlap.

CSA G40.21 350WT (CSA G40.21-13 (R2023)) and BS 970 (Part 1) 170H20 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. CSA G40.21 350WT is typically used for bridges,offshore structures,heavy fabrication,pressure vessels,cranes,structural components, while BS 970 (Part 1) 170H20 is commonly used for through hardening boron steel (section three). CSA G40.21 350WT is defined under Canadian Standards Association (CSA), originating from Canada, while BS 970 (Part 1) 170H20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, CSA G40.21 350WT vs BS 970 (Part 1) 170H20 is a 81.7% 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 81.7%.

Frequently Compared With CSA G40.21 350WT:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
81.7%
MECHANICAL MATCH
No shared data
OVERALL
81.7%
Specifications
Property CSA G40.21 350WT BS 970 (Part 1) 170H20
Standard CSA G40.21-13 (R2023) BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) <=0.22 0.17-0.23
Mn (%) <=1.60 0.80-1.10
P (%) <=0.035 Not specified
S (%) <=0.035 Not specified
B (%) Not specified 0.0005-0.005
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property CSA G40.21 350WT BS 970 (Part 1) 170H20
Tensile Strength 480-650 MPa Not specified
Yield Strength 350 MPa min Not specified
Elongation 18-22 % Not specified
Typical Applications
CSA G40.21 350WT
bridges,offshore structures,heavy fabrication,pressure vessels,cranes,structural components
BS 970 (Part 1) 170H20
Through hardening boron steel (section three)
Key Differences
Can CSA G40.21 350WT Be Substituted With BS 970 (Part 1) 170H20?
CSA G40.21 350WT and BS 970 (Part 1) 170H20 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
CSA G40.21 350WT
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–7000 mm (259.84–275.59 in)
BS 970 (Part 1) 170H20
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On M-EX Right Now
CSA G40.21 350WT
2 active listings and RFQs →
BS 970 (Part 1) 170H20
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Frequently Asked Questions
What is the difference between CSA G40.21 350WT and BS 970 (Part 1) 170H20?
CSA G40.21 350WT specifies P, S which are not specified for BS 970 (Part 1) 170H20. BS 970 (Part 1) 170H20 specifies B which is not specified for CSA G40.21 350WT.
Can CSA G40.21 350WT be substituted with BS 970 (Part 1) 170H20?
CSA G40.21 350WT and BS 970 (Part 1) 170H20 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.