ASTM A36 vs ASME SA105

Close Alternative — 72.7% match based on chemical composition and mechanical property overlap.

ASTM A36 (ASTM A36) and ASME SA105 (ASME BPVC.II.A-2025 SA-105/SA-105M) are both steel grades. Both fall under the Carbon Steel category. ASTM A36 is typically used for structural fabrication, bridges, buildings, machinery parts, flanges, while ASME SA105 is commonly used for pressure vessel flanges, boiler fittings, valves, piping components requiring asme certification. ASTM A36 is defined under ASTM International (United States).

As per chemical composition, ASTM A36 vs ASME SA105 is a 92.4% match. As per mechanical properties, the match is 33.3%. Combined, this makes them a close alternative overall at 72.7%.

Frequently Compared With ASTM A36:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
92.4%
MECHANICAL MATCH
33.3%
OVERALL
72.7%
Specifications
Property ASTM A36 ASME SA105
Standard ASTM A36 ASME BPVC.II.A-2025 SA-105/SA-105M
Category Carbon Steel Carbon Steel
C (%) ≤0.26 ≤0.35
Mn (%) ≤1.20 0.60–1.05
Si (%) 0.15–0.40 0.10–0.35
P (%) ≤0.040 ≤0.035
S (%) ≤0.050 ≤0.040
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A36 ASME SA105
Tensile Strength 400–550 MPa 485 MPa min
Yield Strength 250 MPa min 250 MPa min
Elongation ≥23% ≥22%
Hardness Not specified ≤197 HB
Typical Applications
ASTM A36
Structural fabrication, bridges, buildings, machinery parts, flanges
ASME SA105
Pressure vessel flanges, boiler fittings, valves, piping components requiring ASME certification
Can ASTM A36 Be Substituted With ASME SA105?
ASTM A36 and ASME SA105 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
ASTM A36
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–2700 mm (98.43–106.3 in)
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5600–6500 mm (220.47–255.91 in)
ASME SA105
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6000–6800 mm (236.22–267.72 in)
On M-EX Right Now
ASTM A36
4 active listings and RFQs →
ASME SA105
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A36 and ASME SA105?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A36 be substituted with ASME SA105?
ASTM A36 and ASME SA105 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.