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CSA G40.21 350WT vs GB/T 3077 12Cr2Ni4A

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

CSA G40.21 350WT (CSA G40.21-13 (R2023)) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) 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 GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. CSA G40.21 350WT is defined under Canadian Standards Association (CSA), originating from Canada, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, CSA G40.21 350WT vs GB/T 3077 12Cr2Ni4A is a 64.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With CSA G40.21 350WT:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A 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
Other Alloy Steel Grades to Compare With CSA G40.21 350WT:
EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
64.2%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property CSA G40.21 350WT GB/T 3077 12Cr2Ni4A
Standard CSA G40.21-13 (R2023) GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) <=0.22 0.10-0.15
Mn (%) <=1.60 0.30-0.60
P (%) <=0.035 0.025 max
S (%) <=0.035 0.025 max
Si (%) Not specified 0.17-0.37
Cr (%) Not specified 1.25-1.65
Ni (%) Not specified 3.25-3.75
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 GB/T 3077 12Cr2Ni4A
Tensile Strength 480-650 MPa 980-1180 MPa
Yield Strength 350 MPa min 785-980 MPa
Elongation 18-22 % 10-14%
Hardness Not specified 58-62 HRC (case)
Typical Applications
CSA G40.21 350WT
bridges,offshore structures,heavy fabrication,pressure vessels,cranes,structural components
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can CSA G40.21 350WT Be Substituted With GB/T 3077 12Cr2Ni4A?
CSA G40.21 350WT and GB/T 3077 12Cr2Ni4A 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
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)
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
CSA G40.21 350WT
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 350WT and GB/T 3077 12Cr2Ni4A?
GB/T 3077 12Cr2Ni4A specifies Si, Cr, Ni which are not specified for CSA G40.21 350WT.
Can CSA G40.21 350WT be substituted with GB/T 3077 12Cr2Ni4A?
CSA G40.21 350WT and GB/T 3077 12Cr2Ni4A 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.