Technical Details
Central Wire offers technical expertise to customers across the globe. Drawing on our unique capabilities and one of the industry's largest technical teams, our resources can be put to work for solving any spring wire problem that arises in your application. Whether you need an engineered solution in an extreme environment of a few adjustments to optimize peak performance, Central Wire will work to achieve the performance you need. Specific details include Tensile Strength, Environmental Performance, and Thermal Treatments.
Download Detailed Properties of Select Alloys
Includes Modulus of Elasticity, Safe Working Temperatures, and comparisons of corrosion resistance and corrosion fatigue across Nickel Alloy and Stainless Steel Alloy Spring Wire.
Modulus of Elasticity | Maximum Safe Temp | ||||||||
Material | Torsion 10' | Tension 10' | Magnetic | Corrosion Fatigue | T.P / T.S.** | High | Low | Corrosion Resiostance (general) | Spring Temper Range (KSI) |
M400 | 10.0 | 10.0 | Varies | Good | 450 F | -320 F | Good | 145/180 | |
K-500 | 10.0 | 10.0 | No | Good | 38/42 | 500 F | -423 F | Good | 145/195 |
600 | 11.0 | 11.0 | No | Good | 40/45 | 750 F | -423 F | Good | 170/230 |
601 | 11.5 | 11.5 | No | Good | Good | 120/205 | |||
625 | 11.0 | 11.0 | No | Excellent | 700 F | -423 F | Excellent | ||
718* | 11.0 | 11.0 | No | Good | 1200 F | -423 F | Good | 210/250 | |
X750 | 11.0 | 11.0 | No | Good | 40/45 | 1200 F | -453 F | Good | 190/230 |
800 | 11.0 | 11.0 | No | Good | Good | 140/175 | |||
805 | 9.0 | 9.0 | Slight | Good | Good | 150/190 | |||
825 | 10.0 | 10.0 | No | Good | Good | ||||
NS902* | 9.5 | 9.5 | Slight | Fair | Fair | 140/160 | |||
H C-276 | 11.4 | 11.4 | No | Excellent | Excellent | ||||
302/304 | 11.0 | 28.0 | Slight | Fair | 40/45 | 500 F | -320 F | Good | 190/360 |
316 | 11.0 | 28.0 | No | Good | 45/50 | Good | 190/360 | ||
347 | 11.0 | 28.5 | Slight | Fair | 45/50 | Fair | 190/310 | ||
20Cb | 11.0 | 28.0 | No | Good | Good | ||||
17-7 PH* | 11.0 | 29.0 | Yes | Fair | 550 F | -320 F | 230/365 | ||
TT-50 | 10.5 | 20.0 | No | Good | Good | 165/234 | |||
410 | 12.0 | 30.0 | Yes | Poor | 42/55 | 500 F | Fair | ||
430 | 13.0 | 28.0 | Yes | Poor | 42/55 | Fair | 160/200 | ||
*Age Hardenable
**Approximate Ration of Torsional Proportional Limit to Ultimate Tensile Strength for Spring Wire
HASTELLOY is a registered trademark of Haynes Corp.
NS: Ni-Span-C H: Hastelloy TT: Tech-Tronic
Download Spring Wire Tensile Strength Detail
Compare Tensile Strengths across various diameters of common Nickel and Stainless Steel spring wire alloys.
Minimum Tensile Strength – Nickel Alloy Spring Wire
Diameter Range Inches (mm) | Minimum Tensile Strength (psi) | ||
Monel® 400 | Inconel® 600 | Monel® K500* | |
<0.028(0.71) | 165,000 | 185,000 | 165,000 |
0.0281(.071) - 0.057(1.45) | 160,000 | 185,000 | 165,000 |
0.0571(1.45) - 0.144(2.90) | 150,000 | 175,000 | 155,000 |
01441(2.90) - 0.229(5.82) | 140,000 | 170,000 | 155,000 |
0.2291(5.82) - 0.312(7.92) | 140,000 | 165,000 | 135,000 |
.3121(7.92) - 0.375(9.53) | 135,000 | 160,000 | 135,000 |
0.3751(9.53)-0.437(11.10) | 130,000 | 155,000 | 125,000 |
0.4371(11.10)-0.500(12.70) | 130,000 | 155,000 | 120,000 |
0.5001(12.70)-0.563(14.30) | 120,000 | 140,000 | 120,000 |
X750 | |||
<0.250(<6.36) | 190,000 | ||
0.250(6.35) - 0.625(15.88) | 160,000 | ||
After Heat Treatment | X750 | ||
0.012(0.30) - 0.250(6.35) | 220,000 | ||
0.2501(6.35) - 0.418(10.62) | 200,000 | ||
0.4181(10.62) - 0.625(15.88) | 180,000 | ||
*K-500 – For cold drawn, annealed and age hardened: all sizes: 130,000
Minimum Tensile Strength – Type 302/304 Spring Wire
Diameter Range Inches (mm) | Tensile Range (psi) |
<.009 (0.23) | 325,000 |
0.009 (0.23) - 0.012 (0.30) | 316,000 - 325,000 |
0.013 (0.33) - 0.016 (0.41 | 308,000 - 314,000 |
0.017 (0.43) - 0.022 (0.56) | 296,000 - 306,000 |
0.023 (0.58) - 0.028 (0.71) | 289,000 - 292,000 |
0.029 (0.74) - 0.036 (0.91) | 280,000 - 285,000 |
0.037 (0.94) - 0.045 ( 1.14) | 272,000 - 280,000 |
0.046 (1.17) - 0.063 (1.60) | 258,000 - 267,000 |
0.064 (1.63) - 0.080 (2.03) | 246,000 - 252,000 |
0.081 (2.39) - 0.094 (2.39) | 238,000 - 242,000 |
0.095 (2.41) - 0.120 (3.05) | 222,000 - 238,000 |
0.121 (3.07) - 0.148 (3.76) | 210,000 - 222,000 |
0.149 (3.78) - 0.162 (4.11 | 200,000 - 205,000 |
0.163 (4.14) - 0.187 (4.75) | 194,000 - 198,000 |
0.188 (4.78) - 0.207 (5.26) | 188,000 - 194,000 |
0.208 (5.28) - 0.225 (5.72) | 184,000 - 188,000 |
0.226 (5.74) - 0.278 (7.06) | 174,000 - 182,000 |
0.279 (7.09) - 0.362 (9.19) | 150,000 - 161,000 |
.363 (9.22) - 0.500 (12.70) | 135,000 - 145,000 |
>0.501 (12.72) | 130,000 |
Download Recommended Thermal Treatments
Review recommended stress equalizing and age hardening parameters of common Spring Wire alloys.
Stress Equalizing | Age Hardening | ||||
Alloy | Temp (F) | Time (hrs) | Temp (F) | Time (hrs) | Maximum Safe Operating Temperature (F) |
Monel® 400 | 575-650 | 1/2-1 | Not Possible | 450 | |
Monel® K500 | 575 | 1/2-1 | 1000 | 4 | 500 |
Inconel® 600 | 800-900 | 1/2-1 | Not Possible | 750 | |
Inconel® 625 | Not Recommended | Not Possible | 700 | ||
X750 Spring Temper | 875 | 3 | 1200 | 4 | 700 |
X750 (>0.025" diameter) w1 Temper (15% cold wor) | Not Recommended | 1350 | 16 | 1000 | |
X750 (Annealed) Spring Temper (,0.025" diameter) | Not Recommended | 1350 | 16 | 1200 | |
X750 Spring Temper | Stress Relieved from Age Hardening | Solution Treat: 2100 High Temp Age: 1550 Regular Age: 1300 | 2 24 20 | 1200 | |
Inconel® 718 Spring Temper | Stress Relieved from Age Hardening | 1325 1150 | 8 8 | 1000 | |
Inconel® 718 w1 Temper (15% cold wor) | Not Recommended | 1800 1320 1150 (Furnace Cool) | 1 8 8 | 1200 | |
Ni-Span C 902 | 750 | 1-1/2 | 1100-1350 | 4-5 | |
Alloy 805 (Temperature Compensating) | 750 | 1/2 | Not Possible | ||
Alloy 825 | 800 | 1 | Not Possible | ||
Alloy 20Cb-3 | Not Possible | ||||
302 Stainless Steel | 650-850 | 1/2 | Not Possible | 500 | |
316 Stainless Steel | 750-850 | 1 | Not Possible | 600 | |
17-7 PH Spring Temper | Stress Relieved from Age Hardening | 900 | 1 | 550 | |
17-7 PH (15% cold work) | Stress Relieved from Age Hardening | 1000 | 1 | 550 | |
PH 15-7 Mo Spring Temper | Stress Relieved from Age Hardening | 900 | 16 (requires air cool) | 550 | |
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