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ASTM A537/A537M Class 1 vs ASTM A537/A537M Class 3

Close Alternative — 81.6% match based on chemical composition and mechanical property overlap.

ASTM A537/A537M Class 1 (ASTM A537/A537M:2013) and ASTM A537/A537M Class 3 (ASTM A537/A537M:2013) are both steel grades. Both fall under the Carbon Steel category. ASTM A537/A537M Class 1 is typically used for fusion welded pressure vessels and structures, while ASTM A537/A537M Class 3 is commonly used for fusion welded pressure vessels and structures. ASTM A537/A537M Class 1 is defined under ASTM International, originating from United States, while ASTM A537/A537M Class 3 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A537/A537M Class 1 vs ASTM A537/A537M Class 3 is a 100% match. As per mechanical properties, the match is 44.7%. Combined, this makes them a close alternative overall at 81.6%.

Frequently Compared With ASTM A537/A537M Class 1:
BS 970 (Part 1) 040A04 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
44.7%
OVERALL
81.6%
Specifications
Property ASTM A537/A537M Class 1 ASTM A537/A537M Class 3
Standard ASTM A537/A537M:2013 ASTM A537/A537M:2013
Category Carbon Steel Carbon Steel
C (%) <=0.24 <=0.24
Mn (%) 0.70-1.35 0.70-1.35
P (%) <=0.025 <=0.025
S (%) <=0.025 <=0.025
Si (%) 0.15-0.50 0.15-0.50
Cu (%) <=0.35 <=0.35
Ni (%) <=0.25 <=0.25
Cr (%) <=0.25 <=0.25
Mo (%) <=0.08 <=0.08
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A537/A537M Class 1 ASTM A537/A537M Class 3
Tensile Strength 485-620 MPa 550-690 MPa
Yield Strength >=345 MPa >=380 MPa
Elongation >=22% >=22%
Condition Normalized, thickness 65 mm and under; elongation in 50 mm gauge length Quenched and tempered, thickness 65 mm and under; elongation in 50 mm gauge length
Typical Applications
ASTM A537/A537M Class 1
Fusion welded pressure vessels and structures
ASTM A537/A537M Class 3
Fusion welded pressure vessels and structures
Can ASTM A537/A537M Class 1 Be Substituted With ASTM A537/A537M Class 3?
ASTM A537/A537M Class 1 and ASTM A537/A537M Class 3 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.
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ASTM A537/A537M Class 1
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ASTM A537/A537M Class 3
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Frequently Asked Questions
What is the difference between ASTM A537/A537M Class 1 and ASTM A537/A537M Class 3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A537/A537M Class 1 be substituted with ASTM A537/A537M Class 3?
ASTM A537/A537M Class 1 and ASTM A537/A537M Class 3 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.