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- SAE 1018 Wire Rod Low Carbon Mild Steel Wire Rod 18# /ML18Mn SWRCH18A C18D
SAE 1018 Wire Rod Low Carbon Mild Steel Wire Rod 18# /ML18Mn SWRCH18A C18D
Details
SAE 1018 Wire Rod Low Carbon Mild Steel Wire Rod
SAE 1018 wire rod (UNS G10180) is mainstream hot-rolled low carbon carbon steel wire rod executed to SAE J403 & ASTM A510 standard, widely used as raw material for cold drawing, cold heading, stamping and welding parts. With balanced C-Mn design, it owns ultra-high ductility, outstanding cold forming performance and excellent weldability, low cold cracking risk during multi-pass drawing and complex heading, and can be carburized for surface hardening treatment. It is supplied in hot rolled black oxide coil or spheroidizing annealed soft state, with diameter range Φ5.5mm–Φ22mm, favored by fastener, hardware and machinery manufacturers globally.
Chemical Composition of SAE 1018 Wire Rod (Mass Fraction, wt.%)
| Element | Content Range | Metallurgical Function |
|---|---|---|
| C | 0.14–0.20% | Low carbon ensures superior plasticity, bending & welding performance |
| Si | ≤0.15% | Low silicon reduces surface decarburization layer during hot rolling |
| Mn | 0.60–0.90% | Refine grain, slightly improve base strength & carburizing hardenability |
| P | ≤0.040% | Strictly limit cold brittleness after cold deformation |
| S | ≤0.050% | Moderate sulfur improves free-cutting property, control hot rolling crack |
International Equivalent Grades
| Region | Standard Grade | Executive Standard |
|---|---|---|
| USA | SAE 1018 / UNS G10180 | SAE J403, ASTM A510 |
| China | ML18Mn / 18# steel wire rod | GB/T 699, Q/BQB 517 |
| Japan | SWRCH18A | JIS G3507 cold heading wire rod |
| Europe | C18E / 1.1147 | EN 10263 cold forming steel |
| ISO | C18D | ISO 4954 |
Core Performance & Processing Features
- Delivery state: Hot rolled black scale coil (original state) or full spheroidizing annealing soft coil. Annealed hardness is low, easy pickling, phosphating, cold drawing and multi-station cold heading without splitting.
- Welding performance: Excellent arc welding, spot welding and gas welding, no preheating required for regular thin & medium size workpieces.
- Heat treatment characteristic: Cannot reach high hardness by direct quenching due to low carbon; standard carburizing process at 900–930℃ oil quenching + low temperature tempering 180–220℃, surface hardness HRC 55–62, hard wear-resistant surface with soft tough inner core.
- Limitation: Low base tensile strength, unsuitable for heavy-load components without carburizing; no natural anti-rust capacity, need surface coating.
Main Application Fields
- Standard fastener industry: Raw material for 4.8/6.8 grade screws, self-tapping screws, rivets, small hex bolts, threaded studs, furniture & electrical assembly fasteners.
- Cold forming & stamped parts: Stamped metal brackets, bent pipe sleeves, chain pins, small cold extruded bushings and mechanical positioning pins.
- Automotive lightweight parts: Small chassis connectors, interior hardware, low-load carburized small gears and shaft pins.
- Construction & general hardware: Welding wire blank, wire mesh, metal fence, wire rope core wire and daily hardware accessories.
SAE 1018 wire rod features stable chemical composition, thin uniform decarburization layer, few surface defects and competitive cost, it is the most versatile low carbon wire rod for mass cold forming production.
Contact us
008617701706555
Room 903, Canyang Zone, No.1016 Youyi Road, Baoshan District, Shanghai, P.R.China
