Product Overview: What is ASTM A299 Plate?
ASTM A299 specification covers manganese-silicon carbon steel plates for use in welded boilers and other pressure vessels. Plates under this specification are produced in two grades (A, B). Yield and tensile strength of Gr. B is higher than Gr. A. Due to high composition of C, Mn, Si. ASTM A299 is widely used for manufacturing pressure and boiler equipments. Plates of this standard under this thickness of 50 mm are normally supplied in as-rolled condition. Plates may be ordered normalized or stress relieved, or both. Plates over 50 mm in thickness shall be normalized.
Supply Condition: Plates up to 50 mm thick are normally supplied in the as-rolled condition, but can be ordered normalized or stress-relieved. Plates over 50 mm thick must be normalized.
Applications: Widely used in heavy industry to build industrial boilers, storage tanks, and chemical or oil processing pressure vessels.
ASTM A299 Chemical Composition
| Element | Grade A | Grade B |
|---|---|---|
| Carbon (C) | 0.28–0.30 | 0.28–0.30 |
| Silicon (Si) | 0.13–0.45 | 0.13–0.45 |
| Manganese (Mn) | 0.84–1.62 | 0.84–1.62 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 | ≤ 0.035 |
ASTM A299 Mechanical Property
| Grade | Thickness (mm) | Yield (MPa, min) | Tensile (MPa) | Elongation (min) |
|---|---|---|---|---|
| Grade A | t ≤ 200 | 275–290 | 515–655 | 19% |
| Grade B | t ≤ 200 | 310–325 | 550–690 | 19% |
ASTM A299 Equivalent Steel Grade
| Steel Grade | Germany | Italy |
|---|---|---|
| A299 | T St E 255 | Fe 3602 KG |
Which Grade to Choose
- Grade A: the standard strength tier for general boiler and pressure-vessel shells at moderate pressure.
- Grade B: higher yield and tensile strength for higher-pressure designs and thicker-walled equipment.
Selection follows the design stress calculation and the applicable pressure-vessel code.
Rigorous Quality Control
Every plate goes through UT inspection before shipment. Third-party inspection by SGS, BV, TUV available upon request.
If you are interested in buying ASTM A299 steel plate products, contact us now for the latest price.
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FAQ
Q: What is the composition of ASTM A299?
A: A manganese-silicon killed carbon steel plate for welded boilers and pressure vessels, produced in two grades with fine-grain practice requirements.
Q: Which grade is stronger, A or B?
A: Grade B, with a minimum yield of about 310–325 MPa and tensile of 550–690 MPa, versus 275–290 MPa and 515–655 MPa for Grade A.
Q: Is A299 available normalized?
A: Yes - plates over 50 mm shall be normalized; thinner plates may be ordered as-rolled, normalized or stress-relieved.
Q: Can A299 be used for high-pressure boilers?
A: Yes, A299 is designed for welded boilers and pressure vessels; Grade B suits higher-pressure designs.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
