AISI 309 Springs
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We could produce AISI 309 springs,309 springs,309 Compression Springs,AISI 309 Extension Springs,AISI 309 Torsion Springs,309 tension spring, AISI 309 disc spring, AISI 309 wave spring,309 Spiral Springs,AISI 309 Automotive Springs,AISI 309 Elevator Springs,AISI 309 coil springs,AISI 309 Conical Springs,AISI 309 Tapered Springs,AISI 309 Barrel Springs,309 die springs,309 Constant Force Springs,309 Power Springs,309 Garter Springs,AISI 309 retaining Springs,AISI 309 Volute Springs,AISI 309 flat springs,AISI 309 Volute Springs,AISI 309 battery springs,AISI 309 Spring Clips,AISI 309 Battery Contacts from china

The diameter of AISI 309 springs that we could do range from 0.30 mm to 3.00 mm.

Our AISI 309 springs come in a variety of surface finishes from bluing to clear or yellow zinc electroplating, electrolytic nickel, powder coating and zinc phosphate coating always executed by specialized subcontractors

At the end of the manufacturing and stress relief cycles, clients require different and very specific types of treatments in order to improve AISI 309 spring performance. Terminal coil grinding, spring setting, internal and external tumbling, shot peen and vibration are the most common ones.

AISI 309 is known for good strength and oxidation resistance in continuous service temperatures up to 2000 F (1093 C).

The chemical composition of 309 springs is as follows


0.2 max


22 - 24




2 max


12 - 15


0.045 max


1 max


0.03 max

The mechanical property of AISI 309 spring is as follows




Tensile  strength

620 MPa

89900 psi

Yield  strength (@ strain 0.200%)

309 MPa

45000 psi

Elongation  at break (in 50 mm)



Hardness,  Brinell



Hardness,  Rockwell B



Hardness,  Vickers (converted from Rockwell B hardness)



We could do solution treatment and ageing treatment for AISI 309 springs as per the requirement of the clients.

We could supply inspection certificate of AISI 309 springs by third party,like TUV,DNV,GL,BV,SGS and so on

In order to control the quality of 309 springs, we have following inspection equipment:Magnetic Particle Flaw Detector,Hot Coil Spring Production Line.Fatigue Testing Machine,Hardening Furnace,Optical Emission Spectrometry,Spring Coiler,Salt Spray Test Machine,Shot Blaster Machine,Automatic Spring Coiler,Electric Temper Furnace,Electric Temper Furnace,Automatic Spring Coiler,Pressure Testing Machine20mm CNC Spring Coiler,Spring Grinder,Pressure Testing Machine

Our 309 springs are widely used in aircraft engine manufacturers, oil patch suppliers, petrochemical corporations and power-generation companies. Various military branches, aerospace engineers and nuclear markets and so on

Please send us the drawing of AISI 309 springs that you need, we are glad to quote the best price for your side.

Except AISI 309 Springs,we also could produce AISI 309 flanges,AISI 309 plates,AISI 309 fasteners,AISI 309 bolts,AISI 309 pipe fittings,AISI 309 pipes,AISI 309 tubes,AISI 309 bars