Mild steel
ASTM A36 is the common American carbon structural steel for plates, shapes and bars used in bolted, riveted and welded construction.
- Spec ASTM A36 (plates ≤ 20 mm)
- Density 7.85 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| Also known as | A36, SA36 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| C | — | 0.25 |
| Si | — | 0.40 |
| Fe | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 400 MPa (58.0 ksi) |
| Yield strength, 0.2% offset (min) | 250 MPa (36.3 ksi) |
| Elongation in 50 mm (min) | 23 % |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Magnetic response | Magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Plates | IS 2062, ASTM A36 | 0.3 mm – 6 mm |
| HR sheets & coils | IS 1079 | 0.3 mm – 6 mm |
| CR sheets & coils | IS 513 | 0.3 mm – 6 mm |
| Chequered plates | IS 3502 | 0.3 mm – 6 mm |
| ERW pipes | IS 1239, IS 3589, ASTM A53 | 1/8" – 24" NB |
| Hollow sections (SHS / RHS) | IS 4923 | As per IS 808 / standard sizes |
| Angles, channels & beams | IS 2062, IS 808 | As per IS 808 / standard sizes |
| Flats, rounds & squares (bars) | IS 2062 | 3 mm – 500 mm |
Corrosion & temperature resistance
Mild steel has no built-in corrosion resistance. It is normally primed and painted, galvanised or lined for outdoor and wet service; galvanised and pre-painted material can be sourced on request.
Applications
ASTM A36: Structures, base plates, general engineering. Building and industrial structures, sheds, frames and supports, base plates, platforms and walkways, gates and grills, machine frames, conveyors and general engineering work.
Frequently asked questions
What is ASTM A36 used for?
US structural carbon steel. Typical uses: structures, base plates, general engineering.
Is ASTM A36 magnetic?
Magnetic.
In which forms can I buy ASTM A36 from Rajkamal Metals?
Coils & Strips, Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Structural Sections, Flanges, Buttweld Fittings, Socket Weld & Threaded Fittings, Fasteners, Dish Ends, Custom Orders. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with ASTM A36?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
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