- Carbon steel with additives (boron, mnium, or chromium), hardened and tempered, c: 0.20 to 0.55, p: 0.025 maximum, s: 0.025 maximum, b: 0.003 maximum
- Carbon steel with additives (boron, mnium, or chromium), hardened and tempered, c: 0.20 to 0.55, p: 0.025 maximum, s: 0.025 maximum, b: 0.003 maximum