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Spring makers posses a vast amount of knowledge. In this section they can share that knowledge with their fellow spring makers around the world. We encourage all great spring makers to post a few trade secrets in a specific category. Each spring maker that posts a secret of the trade will get full credit for their submission and their trade secret will be posted for everyone to see. Enjoy!
"Spring makers unite and collaborate with each other for the better good of the Spring world !!"
Heat Treating Chart for Spring Wire
| Material | *OD Opens/Closes | Temperature | Time |
|---|---|---|---|
| Hard Drawn | closes | 550 F | 20 mins |
| K Monel | 1000 F | 4 hours | |
| Monel | does not move | 600 F | 1 hours |
| Valve Oil Tempered | closes | 500 F - 600 F | 30 mins or until blue on ends |
| Oil Tempered | closes | 500 F - 600 F | 30 mins |
| Music Wire | closes | 500 F | 30 mins |
| Stainless Steel 302 | opens | 600 F - 650 F | 30 mins |
| Stainless Steel 316 | does not move | 700 F | 1 hour |
| Stainless Steel 17-7PH or 17-4PH | opens a little | 900 F | 1 hour |
| Inconel 718 | 1375 F | 16 hours | |
| Inconel | 700 F - 900 F | 1 hour | |
| Inconel No. 1 Temper | does not move | 1375 F | 16 hours then reduce to 700 F for 1 hour |
| Inconel X-750 | 1225 F | 4 hours | |
| Inconel 600 | 900 F | 1 hour | |
| Inconel X Spring Temper | 1250 F | 4 hours | |
| Chrome Silicone | closes | 800 F | 30 mins |
| Chrome Vanadium | closes | 800 F | 30 mins |
| Bronze | 350 F | 15 mins | |
| Beryllium Copper | closes 1% | 600 F | 30 mins to 2 hours |
| Beryllium Copper 25 1/2 hard | 600 F | 30 mins | |
| Elgiloy (open more in salt) | opens 3% | 900 F | 5 hours |
| Aluminum | 400 F | 30 mins | |
| Brass | just warm up | just warm up | |
| Basic | none | none | |
| Premier | 600 F - 650 F | 15 to 30 mins | |
| Rene 41 | 1400 F | 16 hours | |
| Ni Span C (on big wire) | opens some | 1250 F | 3 hours |
| Ni Span C Alloy 902 50% cold worked | 900 F | 5 hours | |
| Titanium | opens (like SS) | 800 F | 10 hours |
| Maraging Flat Stock | does not move | 950 F | 4 hours NO LESS |
| Maraging Wire | does not move | 850 F | 30 mins |
| MP35N | 1200 F | 4 hours | |
| Hastelloy C-22 | Stress Relief @ 750 F-840 F | 30 mins | |
| Rocket Wire Min. Tensile Strength 25 KS | 525 F | 2 hours |
*OD = outer diameter of the spring