Heat Treatment Parameters: alloy steel
4340 normalize to 8620 normalize
Heat treatment process parameters for engineering alloys — annealing, normalizing, quench-and-temper, precipitation hardening, carburizing, and stress relief. Covers carbon steels (1020/1045/1080), alloy steels (4130/4140/4340/8620/52100), tool steels (H13/D2/M2), stainless steels (304/316/17-4PH/15-5PH), aluminum alloys (2024/6061/7075), Ti-6Al-4V titanium, and Inconel 718. Per ASM Handbook Vol.4A/4B, ASTM A255, AMS 2770.
| alloy family | record id | alloy | anneal temp C (C) | anneal temp F (F) | austenitize temp C (C) | austenitize temp F (F) | hardness as treated HB (HB) | hardness as treated HRC (HRC) | hold time min (min) | normalize temp C (C) | normalize temp F (F) | quench medium | temper temp max C (C) | temper temp max F (F) | temper temp min C (C) | temper temp min F (F) | tensile strength MPa (MPa) | treatment type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| alloy steel | 4340 normalize | 4340 | — | — | — | — | — | 30 | — | 870 | 1,600 | — | — | — | — | — | 269 | normalizing |
| alloy steel | 4340 qt high | 4340 | — | — | 845 | 1,550 | 512 | 50 | 60 | — | — | oil | 315 | 600 | 205 | 400 | 1,760 | quench and temper |
| alloy steel | 4340 qt high strength | 4340 | — | — | 845 | 1,550 | 302 | 31 | 60 | — | — | oil | 650 | 1,200 | 540 | 1,000 | 1,020 | quench and temper |
| alloy steel | 4340 qt medium | 4340 | — | — | 845 | 1,550 | 352 | 39 | 60 | — | — | oil | 540 | 1,000 | 425 | 800 | 1,241 | quench and temper |
| alloy steel | 52100 anneal | 52100 | 790 | 1,455 | — | — | 197 | — | 480 | — | — | — | — | — | — | — | 689 | spheroidize anneal |
| alloy steel | 52100 qt | 52100 | — | — | 845 | 1,550 | 760 | 63 | 60 | — | — | oil | 175 | 350 | 150 | 300 | 2,100 | quench and temper |
| alloy steel | 8620 anneal | 8620 | 845 | 1,550 | — | — | 163 | — | 60 | — | — | — | — | — | — | — | 572 | full anneal |
| alloy steel | 8620 carburize | 8620 | — | — | — | — | — | 60 | 240 | — | — | — | 175 | 350 | 150 | 300 | — | carburizing |
| alloy steel | 8620 normalize | 8620 | — | — | — | — | — | 30 | — | 900 | 1,650 | — | — | — | — | — | 179 | normalizing |
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