ASTM A36 covers the chemical and mechanical requirements for carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges, buildings, and general structural purposes. Bolts manufactured from A36 steel include ASTM specifications A307 and F1554 Grade 36 as well as SAE J429 Grade 2.

A36 Mechanical Requirements

Tensile, ksi 58 - 80
Yield, min ksi 36
Elongation, min % in 2” 20
Elongation, min % in 8” 23
This abridged table shows only the mechanical requirements for bars. The complete table can be found in the ASTM standard at

A36 Chemical Requirements

Thickness, inches Up to 3/4" Over 3/4" to 1-1/2" Over 1-1/2" to 4" Over 4"
Carbon, max % 0.26 0.27 0.28 0.29
Manganese, % 0.60 - 0.90 0.60 - 0.90 0.60 - 0.90
Phosphorous, max % 0.04 0.04 0.04 0.04
Sulfur, max % 0.05 0.05 0.05 0.05
Silicon, max % 0.40 0.40 0.40 0.40
Copper, min % when copper is specified 0.20 0.20 0.20 0.20
This abridged table shows only the chemical requirements for bars. The complete table including shapes and plates can be found in the ASTM standard at

Appurtenant Materials

When components of a steel structure are identified with this ASTM designation, but the product form is not listed in the scope of this specification, the material shall conform to one of the standards listed below unless otherwise specified by the purchaser.

A36 Appurtenant Materials

Material ASTM Designation
Bolts A307 Grade A
High Strength Bolts A325
Nuts A563
Forgings A668 Class D
Anchor Bolts F1554 Grade 36
Table abridged to show only those items relevant to Portland Bolt

Commentary Regarding Appurtenant Materials

This is not to say that the materials listed above conform to or can be made from A36 steel, simply that if the purchaser calls out a product per A36, but one that is not covered in the above scope (shapes, bars, plates), the manufacturer or supplier can supply product conforming to the above standards. For example, anchor bolts called out as A36 would be supplied as F1554 Grade 36.