347H Springs
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We could produce 347H springs,347 H springs,347 H Compression Springs,347H Extension Springs,347H Torsion Springs,347 H tension spring, 347H disc spring, 347H wave spring,347 H Spiral Springs,347H Automotive Springs,347H Elevator Springs,347H coil springs,347H Conical Springs,347H Tapered Springs,347H Barrel Springs,347 H die springs,347 H Constant Force Springs,347 H Power Springs,347 H Garter Springs,347H retaining Springs,347H Volute Springs,347H flat springs,347H Volute Springs,347H battery springs,347H Spring Clips,347H Battery Contacts from china

The diameter of 347H springs that we could do range from 0.30 mm to 3.00 mm.

Our 347H 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 347H spring performance. Terminal coil grinding, spring setting, internal and external tumbling, shot peen and vibration are the most common ones.

347H is used at temperatures in the carbide precipitation range, 45-900°C, and subsequently exposed to corrosive environments.

The chemical composition of 347 H springs is as follows


Content (%)


62.83 - 73.64


17 - 20


9 - 13





Nb (, Cb)

0.320 - 1


0.04 - 0.10





The mechanical property of 347H spring is as follows



Tensile Strength.

75 min.

Yield Strength (0.2% offset)

30 min.

Elongation in 2” (50mm) or 4D


We could do solution treatment and ageing treatment for 347H springs as per the requirement of the clients.

We could supply inspection certificate of 347H springs by third party,like TUV,DNV,GL,BV,SGS and so on

In order to control the quality of 347 H 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 347 H springs are widely used in Sanitary ,valve production,Gas technology,Heating technology,Welding / cutting technology,Construction industry,Soldering technology,Connecting technologyMeasurement technology,Pump production,Regulating / controlling technology,Air-conditioning technology,Automotive electrics,Musical instruments,Fire safetyDrive systems and so on

Please send us the drawing of 347H springs that you need, we are glad to quote the best price for your side.

Except 347H Springs,we also could produce 347H flanges,347H plates,347H fasteners,347H bolts,347H pipe fittings,347H pipes,347H tubes,347H bars