A204 Grade C has higher carbon content than A203 Grade D steel. Therefore, A203 Grade D steel has good weldability.
A203 Grade D and A204 Grade C steel chemical composition(%, by mass)
Grades |
C max, Thick mm |
Mn max, Thick mm |
Si |
P max |
S max |
Mo |
Ni |
|
T≤ 25 |
25 to 50 |
T≤ 50 |
T >50 |
|
A203 Gr D |
0.17 |
0.17 |
0.70 |
0.78 |
0.15-0.40 |
0.025 |
0.025 |
- |
3.25-3.75 |
|
A204 Gr C |
0.23 |
0.26 |
0.90 |
0.90 |
0.15-0.40 |
0.025 |
0.025 |
0.45-0.60 |
- |
Mechanical properties
| Mechanical Property |
A203 Grade D |
|
Tensile strength, MPa 50mm and under |
450-585 |
|
Tensile strength, MPa] over 50mm |
450-585 |
|
Yield strength, MPa 50mm and under |
255 |
|
Yield strength, min, MPa Over 50mm |
255 |
|
Elongation in 8 in. [200 mm], min, % |
19 |
|
Elongation in 2 in. [50 mm], min, % |
23 |
A204 Grade C Tensile Requirements
Tensile Strength, (MPa) |
Yield Strength, (MPa) |
% Elongation in 2 in. (50mm) min |
% Elongation in 8 in. (200mm) min |
|
515-655 |
295 |
20 |
16 |
BBN steel is specialized in supplying boiler and pressure vessel steel plate, mainly dealing with specification standard plates in ASTM A203, ASTM A204, ASTM A285, ASTM A537, ASTM A516, ASTM A515, ASTM A514, ASTM A662, ASTM A387, ASTM A517, ASTM A203, ASTM A202, ASTM A203, SA302, JIS G3115, JIS G3103, EN 10028-2, EN 10028-3, EN 10028-5, EN 10028-6, and thickness can be up to 260mm.
