Is A285C steel the ASTM standard Q245R material equivalent? A lot of users and boiler designers want to know the answer.
First, let us make a comparison between chemical composition and mechanical properties of A285 Grade C steel and Q245R material.
A285 Grade C steel and Q245R material chemical composition:
| Grade | C | Si | Mn | P | S | Alt |
| A285C | ≦0.28 | ≦0.98 | ≦0.035 | ≦0.035 | ||
| Q245R | ≦0.20 | ≦0.35 | 0.50-1.00 | ≦0.025 | ≦0.015 | ≧0.020 |
A285 Gr C steel and Q245R steel mechanical properties:
| Grade | Yield Strength | Tensile Strength | Elongation |
| (Mpa) | (MPa) | (%) | |
| A285C | ≧205 | 380-515 | ≧23 |
| Q245R | ≧225 | 400-520 | ≧25 |
The most data of chemical composition and mechanical properties of A285C steel and Q245R material are not in line with each other, but the difference is not very big. So strictly speaking, A285C steel is not the ASTM standard Q245R material equivalent. But as they have much in common, they can be used in stead of each other at a lot of conditions. So please confirm with BBN steel technician about which material is OK or both according to your application and working conditions.
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