Cold Heading Special Wire Rod ML08AI ML35 ML40Cr SWRCH18A SWRCH22A SWRCH45K

Wire Rod Wire Rod Wire Rod

Cold Heading Special Wire Rod ML08AI ML35 ML40Cr SWRCH18A SWRCH22A SWRCH45K

  1. Ultra‑low impurity control, excellent anti‑cracking performance for complex cold forging
  2. Fine & uniform microstructure, reduce cracking risk during multi‑station cold heading
  3. Combine GB cold‑heading grade and JIS SWRCH series for global fastener plant
  4. Strict surface inspection to avoid surface defect for precision fastener production
  5. Custom coil weight & splitting service to match cold heading machine requirement
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Product Overview

Cold Heading Special Wire Rod is dedicated hot‑rolled steel raw material for precision cold forging & cold heading fastener. This series include Chinese GB ML08AI, ML35, ML40Cr, JIS SWRCH18A, SWRCH22A, SWRCH45K.

Manufacturing comply with GB/T14981, JIS G3506 standard. Diameter range 5.5‑16mm, coil weight 1.5‑2.5 ton, inner diameter 850mm /1100mm. Coil splitting service available.
Mainly applied for automotive fastener, precision bolts & nuts, complex shape cold‑forming components, hardware spare parts. Every batch supply complete mill test report including heat analysis, mechanical property test, surface quality record. Suitable for high‑end fastener factory with strict cold deformation requirement.

Wire Rod

Chemical & Mechanical Property Snapshot

Grade Standard C(%) Mn(%) Si(%) S(%) Max P(%) Max Tensile Strength(MPa) Elongation(%) Reduction of Area(%)
ML08AI GB/T14981 ≤0.10 0.30‑0.60 ≤0.10 0.030 0.030 300‑410 ≥35 ≥58
ML35 GB/T14981 0.32‑0.39 0.50‑0.80 ≤0.20 0.035 0.035 520‑640 ≥21 ≥41
ML40Cr GB/T14981 0.37‑0.44 0.50‑0.80 ≤0.20 0.035 0.035 580‑700 ≥19 ≥38
SWRCH18A JIS G3506 0.15‑0.20 0.60‑0.90 ≤0.10 0.030 0.030 430‑550 ≥26 ≥49
SWRCH22A JIS G3506 0.19‑0.24 0.70‑1.00 ≤0.10 0.030 0.030 450‑570 ≥24 ≥46
SWRCH45K JIS G3506 0.42‑0.48 0.60‑0.90 ≤0.10 0.030 0.030 590‑710 ≥17 ≥36

 

Detailed Technical Specifications

Item Specification
Product Name Cold Heading Special Wire Rod
Product Type Hot‑rolled coiled cold heading wire rod
Manufacturing Standard GB/T14981, JIS G3506
Grades ML08AI, ML35, ML40Cr, SWRCH18A, SWRCH22A, SWRCH45K
Diameter Range 5.5mm,6.0mm,6.5mm,8.0mm,10mm,12mm,14mm,16mm
Coil Weight 1.5‑2.5 tons per coil
Coil Inner Diameter 850mm /1100mm optional
Coil Service Big coil splitting service available
Quality Document Full Mill Test Certificate with heat number, impurity inspection record
MOQ 5 Ton
Trade Term FOB, CFR, CIF
Payment Terms T/T, L/C at Sight
Packaging Heavy‑duty steel strapping, seaworthy export coil packing
Delivery Time 7‑15 working days upon deposit

Dimension Specification Table

Item Specification
Nominal Diameter 5.5 mm, 6.0 mm, 6.5 mm, 8.0 mm, 10 mm, 12 mm, 14 mm, 16 mm
Coil Weight 1.5–2.5 tons per coil
Coil Inner Diameter 850 mm / 1100 mm
Coil Service Big coil splitting service available
Tolerance ±0.3 mm (hot-rolled standard tolerance)
Surface Hot-rolled, descaled / non-descaled optional

Product Comparison Table

Product Type Equivalent Grades Main Characteristics Typical Applications Selection Guide
Cold Heading Special Wire Rod ML08AI,ML35,ML40Cr,SWRCH18A,SWRCH22A,SWRCH45K Low impurity, uniform microstructure, excellent anti‑cracking cold forging performance Precision fasteners, automotive hardware, complex cold‑forming parts Select for strict cold‑deformation & precision forming requirement

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FAQs

ML series is Chinese national standard cold‑heading dedicated grade. SWRCH series is Japanese JIS standard, widely used in Asia fastener factories. Chemical scope is similar but impurity control requirement is slightly different.

For high‑carbon cold heading grades, spheroidizing annealing is normally required for best cold forming result, we can provide annealing processing service.

MOQ 5 ton, for special grade ML40Cr, minimum production lot may be higher, please contact sales for real‑time stock.

Each coil will go through strict surface visual inspection, reject coils with scratch, crack, folding defects

Normally MOQ 5 ton. If we have available stock, small trial quantity can be discussed.

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Why choose us?

  • ISO, SGS, TÜV, WTRUST, Lloyd’s Register, and DNV certifications

  • Customizable sizes, grades, and surface finishes

  • Full material traceability and inspection reports

  • Responsive support and fast global delivery


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