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. Boltport stocks and uses ASTM A36 bars and plates to manufacture bolts, screws, studs to ASTM A307 Grade A, F568M Class 4.6, ASTM A325/A325M Type 1, Anchor bolts and rods to ASTM F1554 Grade 36, nuts to ASTM A563/A563M Grade A and rivets to ASTM A502 Grade 1 specification.
| Products | Shapes [Note A] | Plates [Note B] | Bars [Note B] | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thickness, inch. | All | To 3/4, Inch | 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 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 |
| Sulfur, max, % | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 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 |
Notes :
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.
| 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] | ||
Notes :
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.
| ASTM A307 Grade A | Bolts |
| ASTM A325 Type 1 | High Strength Bolts |
| ASTM A563 Grade A | Nuts |
| ASTM F1554 Grade 26 | Anchor Bolts |
| ASTM A502 Grade 1 | Rivets |