ASTM A203 boiler steel plate pressure vessel steel sheet introduction:
ASTM A203 boiler steel plate pressure vessel steel sheet is Ni-alloy steel material used to fabric high-temperature pressure vessels. ASTM A203 boiler steel plate pressure vessel steel sheet property is based on it's Ni composition. ASTM A203 has five grades or levels: A203 Grade A, A203 Grade B, A203 Grade D, A203 Grade E, A203 Grade F.
All ASTM A203 boiler steel plate pressure vessel steel sheets under Grades A, B, D, and E shall be normalized as required. The ASTM A203 boiler steel plate pressure vessel steel sheet shall conform to the required chemical compositions. Two mechanical test requirements are presented that includes, tension test requirements and impact test requirements.
ASTM A203 boiler steel plate pressure vessel steel sheet chemical composition:
| Steel Grade | The Element Max (%) | |||||
| C | Si | Mn | P | S | Ni | |
| A203 Grade A | 0.23 | 0.13-0.45 | 0.88 | 0.025 | 0.025 | 2.03–2.57 |
| A203 Grade B | 0.25 | 0.13-0.45 | 0.88 | 0.025 | 0.025 | 2.03–2.57 |
| A203 Grade D | 0.20 | 0.13-0.45 | 0.88 | 0.025 | 0.025 | 3.18–3.82 |
| A203 Grade E | 0.23 | 0.13-0.45 | 0.88 | 0.025 | 0.025 | 3.18–3.82 |
| A203 Grade F | 0.23 | 0.13-0.45 | 0.88 | 0.025 | 0.025 | 3.18–3.82 |
ASTM A203 boiler steel plate pressure vessel steel sheet mechanical properties:
| ASTM A203 | Grade A | Grade B | Grade D | Grade E | Grade F |
| Tensile strength, kis [MPa] | 65-85 [450-585] | 70-90 [485-620] | 65-85 [450-585] | 70-90 [485-620] | 75-100 [515-690] |
| Yield strength, min, kis [MPa] | 37 [255] | 40 [275] | 37 [255] | 40 [275] | 50 [345] |
| Elongation in 8 in. [200 mm], min, % | 19 | 17 | 19 | 17 | - |
| Elongation in 2 in. [50 mm], min, % | 23 | 21 | 23 | 21 | 20 |
ASTM A203 boiler steel plate pressure vessel steel sheet application:
ASTM A203 boiler steel plate pressure vessel steel sheets are widely used in petroleum, chemical, power station, boiler and other industries, for the manufacture of reactor, heat exchanger, separator, spherical tank, paint tank, oil gas cylinders, high-pressure water pipe hydropower stations, water turbines and other equipment and components.
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