HP 9-4-30 steel is a low alloy, high strength steel with a high nickel and cobalt content to promote toughness. The alloy has been designed to have high hardenability, good weldability and excellent fracture toughness. It is typically used in the 220-240 KSI tensile strength range. This alloy is commonly used for aircraft structural components, rocket motor cases, armor plate, pressure valves and gears.
| Specification | Description |
|---|---|
| AMS 6526 | Steel Bars and Forgings. Vacuum Arc Re-Melted. |
| BMS7-182 TY II | Steel Bar and Forgings. |