Leeco Spring International

714 E. Burress Street, Houston, TX 77022

Spring Materials Information

Leeco Spring International designs and manufacture springs using only high-quality materials. The following chart is provided only as a general reference for spring design – please contact us to ensure material availability, spring design application and customization.

Material Material Properties Maximum Working Temperature Ultimate Tensile Range
(ksi min)
Modulus of Elasticity
x 106
Approx. Design % of Ultimate Tensile (torsional) Common Sizes (inches)
Alloy Steel:
Chrome Silicon Wire ASTM A401 UNS G92540 Cold drawn. Good for shock loads and medium elevated temperature applications. 475°F 300/226 (E) 30
(G) 11.5
45% .024 to .438
Chrome Vanadium Wire ASTM A-231 Valve Quality: ASTM A-232 AMS 6450 Cold drawn. Good for shock loads and medium elevated temperature applications. 425°F 325/190 (E) 30
(G) 11.5
45% .043 to .500
High Carbon Steel Wire/Bar:
Music Wire ASTM A228 UNS K08500 & G10860 Cold drawn. Constant tensile strength. High-quality and good for high cycle spring applications. 250°F 449/230 (E) 30
(G) 11.5
45% .012 to .250
Oil Tempered Wire, Class I ASTM A229 UNS K07001 & G10650 Cold drawn. All purpose spring material. Heat treated before fabrication. 250°F 323/125 (class I) (E) 30
(G) 11.5
45% .032 to .625
Hot Rolled Alloy Bar:
5160-H ASTM A689, A29 UNS H516000 Hot-rolled special bar quality, fine grained. Good fatigue life. 400°F 242/211 (E) 29
(G) 10.5
45% .468 to 1.250
Stainless Steel:
AISI 302/304 Stainless Steel Wire ASTM A313 AMS 5688 UNS S30200 Cold drawn. Low cost. Good for general purpose corrosion and elevated temperature applications. Has some magnetism in a spring temper. 570°F 325/130 (E) 28
(G) 9.8
40% .015 to .500
AISI 316 Stainless Steel Wire ASTM A313 AMS 5688 Cold drawn. Better corrosion resistance than 302/304. Good for elevated temperatures. No magnetism. 570°F 245/110 (E) 28
(G) 9.8
40% .017 to .500
17-7PH Stainless Steel Wire ASTM A276 Cond B UNS S31600 Cold drawn. Better corrosion resistance than 302/304. Good for elevated temperatures. No magnetism. 600°F 365/230 (E) 29
(G) 11.0
45% .017 to .562
A-286 Spring Tempered Wire AMS 5734 and others UNS S66286 Age hardened. Good corrosion resistance. Good for use in elevated temperature applications. No magnetism. 750°F 200/160 (E) 29.1
(G) 10.4
45% .040 to .295
Copper Base Alloy:
Phosphor Bronze Wire (Grade A) ASTM B159 H08 UNS C51000 Cold drawn. Good electrical conductivity. Good corrosion resistance. 200°F 145/105 (E) 15
(G) 6.25
40% .010 to .468
Beryllium Copper Wire ASTM B197 Cold drawn. Good electrical conductivity. Good corrosion resistance. 400°F 230/150 (E) 18.5
(G) 7.2
45% .010 to .468
Nickel Base Alloy Wire/Bar:
Inconel X-750 Spring Tempered Wire AMS 5698 AMS 5699 UNS N07750 Cold drawn, age hardened. Good corrosion resistance. Good for use in elevated temperature applications. Good for use in Sour-Gas applications. 700°F 230/180 (E) 29
(G) 11.2
45% .005 to .750
Inconel 600 Wire QQ-W-390 UNS N06600 Cold drawn. Good corrosion resistance. Good for use in elevated temperature applications. 1830°F 205/120 (E) 29
(G) 11.0
45% .005 to .750
Inconel 625 Spring Tempered Wire ASTM B446 UNS N06625 Cold drawn. Good corrosion resistance. Good for use in elevated temperature applications. 395°F 205/120 (E) 29
(G) 11.0
45% .012 to .175
Inconel 718 Spring Tempered Wire ASTM B637 UNS N07718 Cold drawn. Good corrosion resistance. Good for use in elevated temperature applications. Up To 1020°F 250/210 (E) 29
(G) 11.2
45% .012 to .275
MP35N Spring Tempered Wire AMS 5844 UNS R30035 Cold drawn, age hardened. High strength. High modulus value and corrosion resistance. Great choice for severe spring applications. Good for applications involving the presence of Hydrogen Sulfide. 600°F 330/230 (E) 34
(G) 11.74
45% .005 to .750
Elgiloy Spring Tempered Wire AMS 5834 UNS R30003 Cold drawn. Very high fatigue strength and long life. 840°F 350/220 (E) 29.5
(G) 11.5
45% .005 to .750
Monel 400 Spring Tempered Wire AMS 7233 or 4544, ASTM B164 UNS N04400 Cold drawn. Good corrosion resistance. Good for elevated temperature applications. 450°F 165/120 (E) 26
(G) 9.5
40% .014 to .500
Monel K-500 Spring Tempered Wire/Bar QQ-N-286 AMS 4676C UNS N05500 Cold drawn. Very high corrosion resistance. Good for use in elevated temperature applications. 500°F 195/140 (E) 26
(G) 9.5
40% .018 to 2.000
Hastelloy C-276 Wire AMS B574 (Chem. only), AMS J470 UNS N10276 Good corrosion resistance to many acids and salts. 750°F (E) 29.8
(G) 10.9
.012 to .437
Hastelloy B-2 ASTM B335 AMS J470 UNS N10665 Good corrosion resistance to many acids and salts. (E) 28
(G) 8.0
.018 to .207