Electro Polishing Quality Wire
302/3021A Electro Polishing Quality Wire Stainless Steel Wire

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
302/3021A Electro Polishing Quality Wire Stainless Steel Wire
Material: Stainless Steel Wire
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 | ||
303 | WNr1.4305 | ≤0.15 | ≤1.0 | ≤2.0 | ≤0.2 | ≤0.15 | 8.0-10 | 17.0-19.0 | ||
303C | ≤0.15 | ≤1.0 | ≤3.0 | ≤0.2 | ≤0.15 | 8.0-10 | 17.0-19.0 | ≤0.6 | Cu:1.5-3.5 | |
303C1 | ≤0.15 | ≤1.0 | ≤3.0 | ≤0.2 | 0.2-0.33 | 8.0-10 | 17.0-19.0 | Cu:0.5-1.0 | ||
303F | ≤0.15 | ≤1.0 | ≤3.5 | ≤0.2 | 0.3-0.37 | 8.0-10 | 17.0-19.0 | N:≤0.08 | ||
303FA | ≤0.15 | ≤1.0 | ≤2.0 | ≤0.2 | 0.3-0.4 | 8.0-10 | 17.0-19.0 | ≤0.6 | N:≤0.10 |
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Electro Polishing Quality Wire has bright surface, little magnetism, no cracks in molding. It is hard to grow oxide film. So it has high corrosion resistance and long life span. EPQ widely used in the manufacture of bicycle parts, kitchen and sanitary tools, shelves, pet cages, grills, decorative handles and baskets, food and medical machinery parts, etc.
Application for 302 stainless steel wire:
302: High-Quality Springs
3021A: Tight Wire
303: Bolts,Nuts,Shaft
303C: Non-Magnetic Shaft,Free Cutting Processing
303C1: Non-Magnetic Quickly Cut Processed Products
303F : Shaft
303FA: Free Cutting
Steel Grade | Physical Property | |||
Y.S | T.S | EL. | HRB | |
302 | 248 | 627 | 62 | 78 |
3021A | 227 | 600 | 55 | |
XM7(302HQ) | 180 | 480 | 56 | 60 |
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

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