Hot Sale 302/3021A Stainless Steel Spring Wire Bright/Matte Surface
With ISO Certificate
| Material | Stainless Steel Wire |
| Grade | 300series (301, 302,3021A, 304, 304L, 304H, 304N, 304ES, 316L,
321...) 130M, 200CU, 201CU, 202, , 410, 420, 430,etc |
| Standard | ASTM A580, JIS G4309, EN 10088-3, GB/T4240, etc |
| Size | φ0.15mm-φ16mm; or according to customers' requests |
| Surface | Bright, matte ,downy, electrolysis bright ,cloudy ,plain ,black,etc |
| Condition | Annealed and Soft, 1/2 hard, 3/4 hard and full hard |
| Type | Spring Wire (B-SPR/D-SPR) |
| Packing | Woven bag, core, wooden reel, etc |
302/304 stainless steel wire is the most widely used stainless
steel wire due to its high corrosion resistance and good tensile
strength. It is a general-purpose stainless steel alloy, usually
consisting of 18% chromium and 8% nickel. For spring applications,
it is typically offered in the cold drawn condition. 302/304
springs have good strength at moderate temperatures up to 500°F.
302/304 is non-magnetic in the annealed condition, but the material
in the spring condition is slightly magnetic due to some
martensitic transformation during the drawing operation. The higher
the cold reduction, the higher the degree of magnetism.
| Steel Grade | DIN | Chemical composition |
| C | Si | Mn | P | S | Ni | Cr | Mo | Other composition |
| 302 | WNr1.6900 | ≤0.15 | ≤1.0 | ≤2.0 | ≤ 0.045 | ≤0.03 | 8.0-10 | 17.0-19.0 | ≤0.6 | Cu:≤1.0 |
| 3021A | | ≤0.15 | ≤1.0 | ≤2.0 | ≤ 0.045 | ≤0.03 | 8.0-10 | 17.0-19.0 | ≤0.6 | |
Application for 304 stainless steel wire:
302: High-Quality Springs
3021A: Tight Wire
| Steel Grade | Physical Property |
| Y.S | T.S | EL. | HRB |
| 302 | 248 | 627 | 62 | 78 |
| 3021A | 227 | 600 | 55 | |
MTSCO is a professional supplier of steel wire with complete
production technology and rich management experience. We produce
spring wire, electrolytic polished wire, fine wire, wire for
netting, hose wire, welding wire, cold heading, locking wire, and
other products. Our main materials are stainless steel and alloy
steel, and the raw materials we use are from the biggest and most
well-known steel mills in China, we can supply wire in sizes
ranging from 0.15 mm to 16 mm in diameter. Our factory is
well-equipped and our products conform to ASTM, DIN, GTB, JIS, JSG,
and other international standards. We have experienced foreign
trade staff with high-quality service and can produce high-quality
products according to customers' requirements.
Quality Control
Raw Materials: MTC checking(PMI), Tensile strength test,
Surface/Dimension inspection
Prodcution: Specially assigned person shall follow up and check
according to the process flow card, and finally keep the copy
Before shipment: Mechanical properties test, Surface/Dimension
inspection, or according to customers’ requirement
