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How to Heat Treat Spring Steel

 Definition of Heat Treating Springs:
 Wire springs are placed in an oven or furnace for a certain time and temperature to relieve stress as well as to temper the spring wire to give the spring its elasticity and memory.


Acxess Spring's Heat Treating Chart
Material*Outer Diameter   Opens/ ClosesTemperatureTime
Aluminum 400 F30 mins
Basic nonenone
Beryllium Copper ASTM B 197closes 1 %600 F30 mins - 2 hours
Beryllium Copper 25 1/2 hard 600 F30 mins.
Brass just warm upjust warm up
Bronze 350 F15 mins
Chrome Silicon ASTM A 401closes800 F30 mins
Chrome Vanadium ASTM A 231closes800 F30 mins
Elgiloy (open more in salt)opens 3%900 F5 hours
Hard Drawn ASTM A 227closes550 F20 mins
Hastelloy C-22 Stress Relief @ 750 F - 840 F30 mins
Inconel QQ-W-390 700 F - 900 F1 hour
Inconel No. 1 Temperdoes not move1375 F16 hours, then reduce to 700 F for 1 hour
Inconel X Spring Temper 1250 F4 hours
Inconel X-750 AMS 5698, 5699 1225 F4 hours
Inconel 600 900 F1 hour
Inconel 718 1375 F16 hours
Monel K 500 QQ-N-286 1000 F4 hours
Maraging Flat Stockdoes not move950 F4 hours
Maraging Wiredoes not move850 F30 mins
MP35N 1200 F4 hours
Monel 400 AMS 7233does not move600 F1 hour
Music Wire ASTM A 228closes500 F30 mins
Ni Span C Alloy 902 50% cold worked 900 F5 hours
Ni Span C (on big wire)opens some1250 F3 hours
Oil Temepred ASTM A 229closes500 F - 600 F30 mins
Premier 600 F - 650 F15 - 30 mins
Rene 41 1400 F16 hours
Rocket Wire Min. Tensile Strength 25 KS 525 F2 hours
Stainless Steel   17-7 PH or 17-4 ASTM A 313 (631)opens a little900 F1 hour
Stainless Steel 302/304 ASTM A 313opens600 F - 650 F30 mins
Stainless Steel 316 ASTM A 313 (631)does not move700 F1 hour
Titaniumopens (like Stainless Steel)800 F10 hours
Valve Oil Temperedcloses500 F - 600 F30 mins or until blue on ends

Acxess Spring, 2225 E. Cooley Dr. Colton, CA 92324

Ph: (951)276-2777 Fx: (951)240-3334 Email: sales@acxesspring.com