4340 (UNS G43400, EN 1.6565) is a high-grade alloy steel known for its strength, toughness, and wear resistance. 4340 is composed of iron (Fe) and contains ~0.4% carbon (C), 0.8-1.1% chromium (Cr), 1.65-2.0 % nickel, and ~0.25% molybdenum (Mo). 4340 is highly versatile in terms of hardened and strengthened via heat treatment, and is magnetic.
| Size | Stock |
|---|---|
| 4340 PRE HARD - 1.00 (25.4MM) RND | 210" In Stock |
| 4340 PRE HARD - 1.50 (38.1MM) RND | 240" In Stock |
| 4340 PRE HARD - 2.00 (50.8MM) RND | 269" In Stock |
| 4340 COND A - 2.00 (50.8MM) RND | 89" In Stock |
| 4340 COND A - 2.25 (57.2MM) RND | 124" In Stock |
| 4340 COND A - 6.25 (158.8MM) RND | 9" In Stock |
| 4340 COND A - 7.75 (196.9MM) RND | 9" In Stock |
| 4340 COND A - 12.00 (304.8MM) RND | 14" In Stock |
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