A204 Alloy Steel Plate for Pressure Vessel
The ASTM A204 specification covers molybdenum alloy steel plates, particularly suitable for welded boilers and high temperature pressure vessels. GNEE is an experienced supplier of boiler and pressure steel plates, offering you ASTM A204 steel plates in all grades and size ranges.
Based on its molybdenum composition, ASTM A204 pressure vessel steel plate cover 3 grades: A, B, C. The maximum plate thickness is limited only by the chemical composition to achieve certain mechanical properties; steel plates and coils under this specification are generally limited to the following thicknesses: ASTM A204 Grade A: 6 inches [150 mm]; ASTM A204 Grade B: 6 inches [150 mm]; ASTM A204 Grade C: 4 inches [100 mm].
A204 vessel plate chemical composition
| Elements Composition % | ||||
|---|---|---|---|---|
| SA 204 Grade A |
SA 204 Grade B |
SA 204 Grade C |
||
| Carbon, max: | ||||
| up to 1 in. [25 mm] incl. in thickness | 0.18 | 0.20 | 0.23 | |
| Over 1 in. to 2 in [50 mm] incl. in thickness | 0.21 | 0.23 | 0.26 | |
| Over 2 in. to 4 in. [100 mm] incl. in thickness | 0.23 | 0.25 | 0.28 | |
| Over 4 in. [100 mm] incl. in thickness | 0.25 | 0.27 | 0.28 | |
| Manganese, max: | ||||
| Heat analysis: | 0.90 | 0.90 | 0.90 | |
| Product analysis: | 0.98 | 0.98 | 0.98 | |
| Phosphorus, max | 0.025 | 0.025 | 0.025 | |
| Sulfur, max | 0.025 | 0.025 | 0.025 | |
| Silicon: | ||||
| Heat analysis | 0.15-0.40 | 0.15-0.40 | 0.15-0.40 | |
| Product analysis | 0.13-0.45 | 0.13-0.45 | 0.13-0.45 | |
| Molybdenum: | ||||
| Heat analysis | 0.45-0.60 | 0.45-0.60 | 0.45-0.60 | |
| Product analysis | 0.41-0.64 | 0.41-0.64 | 0.41-0.64 | |
a204 boiler plate mechanical property
| Mechanical Property of ASTM A204 steel plate | Grade A | Grade B | Grade C |
|---|---|---|---|
| Tensile strength, kis [MPa] | 65-85 [450-585] | 70-90 [485-620] | 75-95 [515-655] |
| Yield strength, min, kis [MPa] | 37 [255] | 40 [275] | 43 [295] |
| Elongation in 8 in. [200 mm], min, % | 19 | 17 | 16 |
| Elongation in 2 in. [50 mm], min, % | 23 | 21 | 20 |
a204 pressure vessel steel Equivalent steel grade
| ASTM | GB | JIS | DIN | EN | |||||
|---|---|---|---|---|---|---|---|---|---|
| Steel Grade | Steel Grade | Steel Grade | Standard Number | Steel Grade | Material Number | Standard Number | Steel Grade | Material Number | Standard Number |
| A204-Gr. A.B | 16Mo | 16Mo | G3103 | 15 Mo3 | 1.5414 | DIN17155 | 16Mo3 | 1.5415 | EN 10028-2 |
GNEE can supply ASTM A204 Steel Plates from stock or from reputable steel mills. We also provide steel fabrication services, where steel plates can be cut (to any size and any shape), drilled, welded, milled, machined, etc. to suit your needs. Our steel mill has fabrication staff with 5-10 years of experience. If you are interested in purchasing ASTM A204 Steel Plate products, please contact us today for the latest prices or check the table below for equivalent steel grades to ASTM A204.
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