ASTM A36 / A36M
ASTM A36 is a standard material specification for carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes. This specification covers chemical and mechanical and other supplementary requirements for carbon steel bars, plates and other structural shapes. Ferrobend stocks and supplies bars and rods, sheets and plates, fabricated angles, channels, beams, sections and anchor bolts to ASTM A36 specifications.
Chemical Composition
| Products | Shapes [Note A] | Plates [Note B] | Bars [Note B] | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thickness, inch. | All | To 3/4, Incl. | Over 3/4 to 1-1/2, Incl. | Over 1-1/2 to 2-1/2, Incl. | Over 2-1/2 to 4, Incl. | Over 4 | To 3/4, Incl. | Over 3/4 to 1-1/2, Incl. | Over 1-1/2 to 4, Incl. | Over 4 |
| Carbon, max, % | 0.26 | 0.25 | 0.25 | 0.26 | 0.27 | 0.29 | 0.26 | 0.27 | 0.28 | 0.29 |
| Manganese, % | ... | ... | 0.80 - 1.20 | 0.80 - 1.20 | 0.85 - 1.20 | 0.85 - 1.20 | ... | 0.60 - 0.90 | 0.60 - 0.90 | 0.60 - 0.90 |
| Phosphorus, max, % | 0.04 | |||||||||
| Sulfur, max, % | 0.50 | |||||||||
| Silicon, % | 0.40 max | 0.40 max | 0.40 max | 0.15 - 0.40 | 0.15 - 0.40 | 0.15 - 0.40 | 0.40 max | 0.40 max | 0.40 max | 0.40 max |
| Copper, min, % [Note C] | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
A: Manganese content of 0.85–1.35 % and silicon content of 0.15–0.40 % is required for shapes with flange thickness over 3 inches.
B: For each reduction of 0.01 percentage point below the specified carbon maximum, an increase of 0.06 percentage point manganese above the specified maximum will be permitted, up to the maximum of 1.35 %.
C: When Copper steel is specified.
Mechanical Properties
| Property | Tensile Strength, ksi | Yield Point, min, ksi | Elongation, min, % | |
|---|---|---|---|---|
| In 8 Inch. | In 2 Inch. | |||
| Plates, Shapes [Note A], and Bars | 58 - 80 | 36 | ... | ... |
| Plates and Bars [Note B, C] | ... | ... | 20 | 23 |
| Shapes | ... | ... | 20 | 21 [Note A] |
A: For wide flange shapes with flange thickness over 3 inches, the 80 ksi maximum tensile strength does not apply and a minimum elongation in 2 inches, of 19 % applies.
B: Elongation not required to be determined for floor plate.
C: For plates wider than 24 inches, the elongation requirement is reduced two percentage points.
