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Materials, Finishes and Plating

spring materials

Lee Spring offers both stock springs and springs made to specifications in many material options. Depending on the application, the right material can make all the difference in the performance of a spring. Common considerations with regards to material include operating temperature, corrosion resistance requirements and spring parameters needed. A Lee Spring Engineer is available to assist with material inquiries should you have questions regarding a specific application or material.

 

 

Lee Spring Stock Series Materials
Stock Spring Series Music Wire Stainless Steel Elgiloy Oil Tempered MB Chrome Silicon Beryllium Copper Ultem
Compression LeeP Plastic Composite             X
Bantam Mini Series     X        
Instrument Series X X          
Lite Pressure Series   SS316          
Standard Series X X          
Heavy Duty Series X X   X      
High Pressure Series   17-7 PH          
REDUX Wave Series   17-7 PH          
HEFTY Die Springs X       X    
DIN-Plus Series X^ X^          
Extension X X          
Torsion Springs X X          
Belleville Washers   300 Series          
Constant Force   301          
Battery Springs X         X  
Continuous Length Extension X 302          
Spring Kits X X          
Drawbar   X          
MIL-SPEC Compression X* 302 DFARS          
MIL-SPEC Extension X* 302 DFARS          

* Uncoated per ASTM A228 (or) Cadmium Plated Music Wire (or) Zinc plated Music Wire Available

X^ Similar grades as per EN 10270

Material Properties

High Carbon Steels

Material Commercially Available Specification Nominal Chemistry Density (lb/in3) Minimum Tensile Strength (psi x 106) Modulus of Elasticity (E)(psi x 106) Modulus in Torsion (G)(psi x 106) Maximum Operating Temperature Description & Primary Use
Oil Tempered MB
ASTM A229 C 0.55 - 0.85%, Mn 0.30 - 1.20% 0.28 Class I: 165 - 293, Class II: 191 - 324 30 11.5 250 °F

General purpose spring wire for average stress applications. Highly magnetic. Often used for larger wire sizes when Music Wire is not available.

Hard Drawn MB
ASTM A227 C 0.45 - 0.85%, Mn 0.30 - 1.30% 0.28 Class I: 147 - 283, Class II: 171 - 324 30 11.5 250 °F

General purpose spring wire for low to average stress applications. Cold drawn to desired properties. Highly magnetic.

Music Wire
ASTM A228 C 0.70 - 1.00%, Mn 0.20 - 0.70% 0.28 230 - 399 30 11.5 250 °F

High quality spring wire that is cold drawn with good surface finish. Highly magnetic. Generally good fatigue life due to high tensile strength.

Alloy Steels

Material Commercially Available Specification Nominal Chemistry Density (lb/in3) Minimum Tensile Strength (psi x 106) Modulus of Elasticity (E)(psi x 106) Modulus in Torsion (G)(psi x 106) Maximum Operating Temperature Description & Primary Use
Oil Tempered Chrome Vanadium
ASTM A231 C 0.48 - 0.53%, V 0.15 Min %, Mn 0.70 - 0.90%, Cr 0.80 - 1.10% 0.28 190 - 300 30 11.5 425 °F

Alloy steel spring wire used for shock loads and moderately elevated temperatures. Highly magnetic. Available in Valve Spring quality in accordance with ASTM A232.

Oil Tempered Chrome Silicon
ASTM A401 C 0.51 - 0.59%, Cr 0.60 - 0.80%, Si 1.20 - 1.60% 0.28 224 - 300 30 11.5 475 °F

Alloy steel spring wire used for shock loads and moderately elevated temperatures. Highly magnetic. Available in Valve Spring quality in accordance with ASTM A877.

Stainless Steels

Material Commercially Available Specification Nominal Chemistry Density (lb/in3) Minimum Tensile Strength (psi x 106) Modulus of Elasticity (E)(psi x 106) Modulus in Torsion (G)(psi x 106) Maximum Operating Temperature Description & Primary Use
Stainless Steel 17-7 PH
AMS 5678 Cr 16.0 - 18.0%, Ni 6.5 - 7.7%, Al 0.75 - 1.5% 0.28 Cond. CH900: 230 - 343 29.5 11 600 °F

Improved strength over 300 Series stainless steels with similar heat and corrosion resistance. Slightly magnetic. Material is precipitation hardened after spring fabrication to achieve desired properties.

Stainless Steel 316
ASTM A313 Cr 16.5 - 18.0%, Ni 10.5 - 13.5%, Mo 2.0 - 2.5% 0.29 125 - 245 28 10 550 °F

General heat resistant spring wire and better corrosion resistance than Type 302/204. Slightly magnetic. Often used in marine applications, resists chloride attack.

Stainless Steel 302/304
ASTM A313 Cr 17.0 - 20.0%, Ni 8.0 - 10.5% 0.29 130 - 325 28 10 550 °F

General purpose corrosion and heat resistant spring wire. Slightly magnetic. Type 304 has less carbon than Type 302, however considered commercially equivalent for stock springs.

Copper Alloys

Material Commercially Available Specification Nominal Chemistry Density (lb/in3) Minimum Tensile Strength (psi x 106) Modulus of Elasticity (E)(psi x 106) Modulus in Torsion (G)(psi x 106) Maximum Operating Temperature Description & Primary Use
Monel K 500
QQ-N-286 Ni 63.0 min%, Cu 27.0 - 33.0%, Al 2.3 - 3.1% 0.31 160 - 200 26 9.5 550 °F

Similar corrosion and heat resistance to Monel 400 with better strength. Good for subzero and cryogenic applications.

Monel 400
AMS 7233 Ni 63.0 min%, Cu 28.0 - 34.0% 0.32 145 - 180 26 9.5 450 °F

Nickel-copper alloy spring wire with good corrosion resistance at moderately elevated temperatures. Good mechanical properties for subzero temperature applications. Generally resistant to hydrofluoric, sulfuric, and hydrochloric acids. Typical for marine and chemical processing applications.

Brass
ASTM B134 Cu 68.5 - 71.5%, Zn 28.5 - 31.5% 0.31 120 min 16 6 200 °F

Good combination of strength and ductility for cold working. Properties based on 70-30 Spring Brass (C26000) sub-type. Used in fresh water and seawater applications.

Beryllium Copper
ASTM B197 Cu 98.0%, Be 1.8 - 2.0% 0.30 160 - 230 18.5 7 400 °F

Non-ferrous spring wire with good corrosion resistance and electrical conductivity. Improved strength over phosphor bronze and non-magnetic. Material is precipitation hardened after spring fabrication to achieve desired properties.

Phosphor Bronze
ASTM B159 Cu 94.0 - 96.0%, Sn 4.0 - 6.0% 0.32 105 - 145 15 6.25 200 °F

Non-ferrous spring wire with good corrosion resistance and electrical conductivity. Non-magnetic.

Nickel Alloys

Material Commercially Available Specification Nominal Chemistry Density (lb/in3) Minimum Tensile Strength (psi x 106) Modulus of Elasticity (E)(psi x 106) Modulus in Torsion (G)(psi x 106) Maximum Operating Temperature Description & Primary Use
Hastelloy (C276)
ASTM B574 Ni 51.0 - 63.5%, Cr 14.5 - 16.5%, Mo 15.0 - 17.0%, Fe 4.0 - 7.0% 0.32 100 - 200 30.7 11.8 700 °F

Good corrosion resistance in chemical process environments. Known for excellent resistance to sulfur and chloride compounds. Useful in marine and waste treatment industries.

NiSpan C
AMS 5225 Fe 45.0 - 51.0%, Ni 41.0 - 43.5%, Cr 4.9 - 5.75%, Ti 2.25 - 2.75%, Al 0.3 - 0.8% 0.29 150 - 190 24.0 - 29.0 9.0 - 10.0 150 °F

Special alloy that is heat-treatable to have a constant modulus over a range of operating temperatures. Material is not stainless and is magnetic. Typically used in timing devices, weighing and geophysical instruments.

Elgiloy
AMS 5833 Co 39.0 - 41.0%, Ni 15.0 - 16.0, Cr 19.0 - 21.0%, Fe 15.0 - 18.0% 0.30 0.300 32 12 850 °F

Cobalt-Nickel alloy known for strength and non-magnetic qualities. Excellent corrosion resistance, good for acetic acid, ammonium chloride, citric acid, sodium chloride and sodium sulfite. Material is precipitation hardened after spring fabrication to achieve desired properties.

Inconel X750
AMS 5698 / 5699 Ni 70.0 min%, Cr 14.0 - 17.0%, Fe 5.0 - 9.0% 0.30 No. 1 Temper: 155 Min, Spring Temper: 180 - 220 31 12 750 - 1100 °F

Better strength over Inconel 600. Material is precipitation hardened after spring fabrication to achieve desired properties. No. 1 Temper provides better heat resistance.

Inconel 718
ASTM B637 Ni 50.0 - 55.0%, Cr 17.0 - 21.0%, Fe 11.0 - 24.0% 0.30 210 - 250 29 11.2 1100 °F

Better strength and heat resistance over Inconel 600. Material is precipitation hardened after spring fabrication to achieve desired properties.

Inconel 600
ASTM B166 Ni 72.0 min%, Cr 14.0 - 17.0%, Fe 6.0 - 10.0% 0.31 140 - 185 31 11 700 °F

Good corrosion resistance and mechanical properties at moderately elevated temperatures. Also good for cryogenic applications. Used in chemical processing, heat-treating, and aerospace industries.

Plastic Composite

Material Notes Maximum Operating Temperature Description & Primary Use
Ultem
A thermoplastic polyetherimide (PEI) resin and a trademark of SABIC Innovative Plastics IP BV. Ultem is naturally amber colored. Lee Spring uses custom resin blends of six color-coded strengths. 340 °F

Excellent chemical resistance and thermal properties. Non-magnetic with very low flammability.

Why Choose Lee Spring?

large selection of springs

25,000+ products
available, plus custom
products made to your specification.

 

FREE Passivation

on 302, 316 & 17-7 Stainless Steel Springs

FREE Plating

on all Music Wire Stock Springs

FREE Grinding

on all Standard Stock Compression Springs

in stock springs

Springs ready to ship
today.

 

Expert Engineering Assistance

on Stock and Custom Springs

Certificate of Compliance

on all Stock Springs and Custom Springs

Guaranteed RoHS Compliance

on all Stock Springs

engineering and customer service support

Engineering and
Customer Service teams ready to
assist.

 

Live Customer Service Support

at all Locations

Enhanced CAD Downloads

on Stock Springs Designs

Global Flexibility

allows Lee Spring to find solutions that meet your
geographic requirements wherever your business
takes you in the world