A490 Chemical Properties
| Type 1 Bolts | ||
|---|---|---|
| Element | Sizes 1/2 to 1-3/8 | Size 1-1/2 |
| Carbon, max | 0.30 - 0.48% | 0.35 - 0.53% |
| Phosphorus, max | 0.040% | 0.040% |
| Sulfur, max | 0.040% | 0.040% |
| Alloying Elements | * | * |
| * Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum range given for the content of alloying elements exceeds one of more of the following limits: Manganese, 1.65%, silicon, 0.60%, copper, 0.60%, or in which a definite range or a minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99%, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium or any other alloying elements added to obtain a desired alloying effect. | ||
| Type 3 Bolts | ||
|---|---|---|
| Element | Sizes 1/2 to 3/4 | Size above 3/4 |
| Carbon | 0.20 - 0.53% | 0.30 - 0.53% |
| Manganese, min | 0.40% | 0.40% |
| Phosphorus, max | 0.035% | 0.035% |
| Sulfur, max | 0.040% | 0.040% |
| Copper | 0.20 - 0.60% | 0.20 - 0.60% |
| Chromium, min | 0.45% | 0.45% |
| Nickel, min | 0.20% | 0.20% |
| or | ||
| Molybdenum, min | 0.15% | 0.15% |