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ASTM A537/A537M Class 2 vs ASTM A537/A537M Class 3

Strong Match — 88.9% match based on chemical composition and mechanical property overlap.

ASTM A537/A537M Class 2 (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 2 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 2 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 2 vs ASTM A537/A537M Class 3 is a 100% match. As per mechanical properties, the match is 66.7%. Combined, this makes them a strong match overall at 88.9%.

Frequently Compared With ASTM A537/A537M Class 2:
BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 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 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 3) 045A10
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
66.7%
OVERALL
88.9%
Specifications
Property ASTM A537/A537M Class 2 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 2 ASTM A537/A537M Class 3
Tensile Strength 550-690 MPa 550-690 MPa
Yield Strength >=415 MPa >=380 MPa
Elongation >=22% >=22%
Condition Quenched and tempered, 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 2
Fusion welded pressure vessels and structures
ASTM A537/A537M Class 3
Fusion welded pressure vessels and structures
Can ASTM A537/A537M Class 2 Be Substituted With ASTM A537/A537M Class 3?
ASTM A537/A537M Class 2 and ASTM A537/A537M Class 3 overlap closely enough on chemistry and mechanical properties that ASTM A537/A537M Class 3 is often considered as a substitute for ASTM A537/A537M Class 2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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ASTM A537/A537M Class 2
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Frequently Asked Questions
What is the difference between ASTM A537/A537M Class 2 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 2 be substituted with ASTM A537/A537M Class 3?
ASTM A537/A537M Class 2 and ASTM A537/A537M Class 3 overlap closely enough on chemistry and mechanical properties that ASTM A537/A537M Class 3 is often considered as a substitute for ASTM A537/A537M Class 2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.