ASTM A307 Grade A bolts are manufactured from (typically 1018 or similar). There is no mandatory heat treatment, which keeps the manufacturing process simple and the product inexpensive.
Do not use A307 Grade A in the following scenarios: astm a307a
If you find a bolt in the field and it has no radial lines or manufacturer marks on the head (except perhaps a low "F" or nothing at all), it is very likely an A307 Grade A. ASTM A307 Grade A bolts are manufactured from
The standard is divided into three grades (A, B, and C), but is the most frequently used for standard bolts and threaded rods. The standard is divided into three grades (A,
A307A is carbon steel. If your application involves high-temperature environments (typically above 400°F / 200°C), you should consult engineering standards to ensure the material retains its integrity. For high-temp applications, ASTM A193 B7 might be a better choice.
They are available in both coarse (UNC) and fine (UNF) thread series, ranging from 1/4" through 4" in diameter.