Varões de aço inoxidável com superfície preta, laminados a quente
Hot Rolled Black Skin Stainless Steel Wire Rods, also named Pickled Wire / Acid Washed Wire / No.1 Finish Wire / Black Wire, are processed by route: hot rolled wire rod → annealing → pickling & passivation to remove oxide scale → surface finishing, without cold drawing & brightening procedures. The surface presents dark grey / grey-black matte appearance without metallic luster, uniform rust-free surface with no obvious oxide scale. With passivation film for stable rust resistance, dimensional tolerance ±0.1mm, high hardness and great tensile strength, the raw material cost is lower than bright annealed wire. Widely used as raw material for industrial welding wire, steel structure fasteners, heavy mechanical parts, pipe connectors, wear-resistant components, construction hardware and heavy industrial equipment accessories for global manufacturing & infrastructure sectors.
In-stock diameter range: 1.0mm–60.0mm; customized heavy thick wire: 60.0mm–120.0mm
Quantidade mínima de encomenda: flexível
Prazo de entrega: 7 a 15 dias úteis
Embalagem: Embalagem padrão adequada para transporte marítimo de exportação
Capacidade de fornecimento: Vasto stock disponível, apoiado pela nossa fábrica própria, a Wuzhou Yongda Special Steel Plant
✉ E-mail: [email protected]
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Descrição
| Item de parâmetro | Especificações (conforme consta na sua folha de cálculo do Excel) |
|---|---|
| Tipo de material | Standard grades: 201, 202, 304, 304L, 316, 316L |
| Especificações de tamanho | In-stock diameter: 1.0mm–60.0mm; Custom large thick wire: 60.0mm–120.0mm; Standard coil weight: 1–3 tons |
| Característica da superfície | Dark grey / grey-black matte surface, no metallic luster, uniform rust-free surface, no obvious residual oxide scale |
| Tolerância dimensional | Controlled tolerance: ±0.1mm, high hardness & excellent tensile strength |
| Norma Executiva | Normas internacionais para o aço inoxidável: ASTM A240, EN 10088, JIS G4303 |
| Características de desempenho | Stable anti-rust performance from dense pickled passivation film, cost advantage vs bright wire, basic cold forming capacity |
Desempenho do produto
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Defined production process without brightening treatment
Manufactured by fixed procedure: hot rolled wire rod → annealing → pickling & passivation for oxide removal → surface finishing, no cold drawing and bright annealing step, matching cost-oriented bulk processing demand.
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Natural matte pickled passivation surface
Dense anti-corrosion passivation layer formed on surface after pickling treatment, stable rust-proof performance, uniform appearance without rust spots and residual heavy oxide skin.
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Economical dimension control for general industrial processing
Diameter tolerance controlled at ±0.1mm, high hardness and tensile property, qualified for conventional cold drawing, cold heading and bending procedures for non-appearance-critical products.
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Cost-effective alternative for non-high-surface requirement scenarios
Lower raw material cost compared with pickled bright wire rods, ideal base material for customers arranging secondary surface treatment afterward.
Aplicações do produto
Características e destaques
- Cost-competitive bulk raw material with stable batch consistency for mass purchasing
- Controlled ±0.1mm dimensional tolerance & good roundness uniformity
- Complete material certification package supporting international export customs clearance
- Full range of common grades, regular medium size & customized extra-large thick wire options
- Flexible for secondary pickling, polishing and other surface rework treatment per customer deman















