ASTM A299/A299M-17 PDF
What is the ASTM A229 equivalent to?
ASTM A299 material is a manganese-silicon carbon steel plate for use in welder boilers and other pressure vessels.
| Steel Grade | Germany | Italy |
|---|---|---|
| A299 | T St E 255 | Fe 3602 KG |

What is the chemical composition of ASTM A299 ?
The chemical composition generally includes carbon, manganese, silicon, phosphorus, and sulfur.
Carbon (C): Typically has a maximum of 0.28% to 0.30% for plates up to 1 inch (25 mm) thick, and can be higher for thicker plates, according to one source.
Manganese (Mn): Heat analysis typically shows 0.90% to 1.40% or 0.90% to 1.50%, depending on thickness, with product analysis showing 0.84% to 1.62% or 0.84% to 1.62%, respectively.
Silicon (Si): Heat analysis typically shows 0.15% to 0.40%, with product analysis showing 0.13% to 0.45%.
Phosphorus (P): Typically has a maximum of 0.035%.
Sulfur (S): Typically has a maximum of 0.035%.
| ASTM A299 Grade Chemical Composition | ||||||
|---|---|---|---|---|---|---|
| Steel Grade | The Element Max (%) | |||||
| C | Si | Mn | P | S | Mo | |
| A299 GR.A | 0.28-0.30 | 0.13-0.45 | 0.84 -1.62 | 0.035 | 0.035 | - |
| A299 GR.B | 0.28-0.30 | 0.13-0.45 | 0.84 -1.62 | 0.035 | 0.035 | - |
What is the Tensile of ASTM A299 ?
Grade A has a tensile strength range of 515-655 MPa (75-95 ksi), while Grade B has a tensile strength range of 550-690 MPa (80-100 ksi). The yield strength for Grade A is 290 MPa (42 ksi) for thicknesses under 25mm (1 inch), and 275 MPa (40 ksi) for thicknesses over 25mm (1 inch). Grade B has a yield strength of 325 MPa (47 ksi) for thicknesses under 25mm (1 inch) and 310 MPa (45 ksi) for thicknesses over 25mm (1 inch).
| Steel Grade | ASTM A299 Mechanical Property | |||
|---|---|---|---|---|
| Thickness mm | Yield Min Mpa | Tensile Mpa | Elongation Min % | |
| A299 GR.A | t≦50 | 275-290 | 515-655 | 19 |
| 50 | 275-290 | 515-655 | 19 | |
| A299 GR.B | t≦50 | 310-325 | 550-690 | 19 |
| 50 | 310-325 | 550-690 | 19 | |




