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For global buyers, ASTM A572 steel is one of the most widely used high-strength low-alloy (HSLA) materials for structural applications.
Compared with standard carbon steel, A572 offers:
ASTM A572 is the preferred upgrade choice when projects require higher strength without significantly increasing cost.
Among all grades, A572 Grade 50 is the most commonly used worldwide, especially for structural fabrication and export projects.
As a global supplier, CJM Steel works closely with distributors and project buyers to match A572 grades with their regional equivalents and performance needs.
One of the most searched topics is:
“What is ASTM A572 equivalent to?”
Here is a practical international comparison:
| ASTM | EN | JIS | IS | Procurement Insight |
| A572 Gr.42 | S275JR | SM400A | IS 2062 E250 | Ideal entry-level replacement for mild structural grades. |
| A572 Gr.50 | S355JR / Q345B | SM490A | IS 2062 E350 | Most popular for export projects; global stock availability. |
| A572 Gr.60 | S420N | SM490YA | IS 2062 E410 | Use when higher yield strength is needed for structural beams. |
| A572 Gr.65 | S460N | SM490YB | IS 2062 E450 | Check project specifications before substitution — close but not identical. |
A572 Grade 50 is most commonly equivalent to S355JR (EN) and Q345B (China) for general structural applications.
Note: Equivalent grades are not always 100% identical — always verify MTC and project specifications before substitution.
ASTM A572 steel properties vary by grade.
Quick answer:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Typical Application | Procurement Insight |
| A572 Gr.42 | 290 | 415 | General structures, low-stress fabrication | Suitable for small fabricators replacing A36 with higher strength. |
| A572 Gr.50 | 345 | 450–620 | Beams, columns, plates, bridges | The most common global grade. S355JR and Q345B are interchangeable in most applications. |
| A572 Gr.55 | 380 | 485–620 | Machinery parts, offshore structures | Limited availability; ensure consistent heat numbers when mixing batches. |
| A572 Gr.60 | 415 | 485–650 | Heavy structural beams, wind tower parts | Ideal where Gr.50 may be insufficient but Gr.65 is excessive. |
| A572 Gr.65 | 450 | 485–655 | High-load bridges, cranes | S460N is a close match but may require additional testing for critical projects. |
A572 Grade 50 offers the best balance between strength, availability, and cost, making it the default choice for most buyers.
A572 steel is designed for a high strength-to-weight ratio with controlled chemical composition.
| Grade | C (%) | Mn (%) | Si (%) | P max (%) | S max (%) |
| A572 Gr.50 | 0.23 | 1.35 | 0.40 | 0.040 | 0.050 |
| A572 Gr.60 | 0.26 | 1.50 | 0.40 | 0.040 | 0.050 |
| A572 Gr.65 | 0.26 | 1.65 | 0.40 | 0.040 | 0.050 |
*Composition for Gr.42 and Gr.55 not shown; Gr.42 has lower C/Mn, Gr.55 is intermediate. Full data available upon request.*
ASTM A572 steel are widely used in:
For bridge and highway structures, ASTM A572 is often compared with A709 steel due to differences in toughness requirements and weathering performance. For a detailed comparison and grade breakdown, see our ASTM A709 steel plate grades and applications guide.
If you are sourcing for structural fabrication or project supply, CJM Steel provides A572 steel plate supplier services with ready stock in Grade 50 and custom cutting options for export projects.
Whether you’re a stockist, trading company, or processing workshop, A572 steels provide flexibility for multi-market distribution.
At CJM Steel, we maintain regular stock for A572 Gr.50 / S355JR, with custom rolling available for higher grades like Gr.60 and Gr.65. Our team helps clients match regional equivalents (EN, IS, JIS) and ensures smooth compliance with project specifications.
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CJM Steel Group Ltd.
This is a very thorough breakdown of A572 grades, especially the procurement insights for Gr. 50 and its S355JR equivalents which are vital for our current offshore projects. We are actually looking into a structural fabrication contract near the Costa del Sol region and were comparing these specs for local compliance. Since we are coordinating this internationally, does CJM Steel provide specific mill test reports that satisfy Eurocode requirements for Spanish inspections? Also, on the logistics side, I’m wondering if you have any preferred freight forwarders in the Algeciras port area who are familiar with handling high-strength structural plates?
2026-02-2720:58