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Cold Rolled Flat Bars
Cold Rolled Flat Bars
ASTM A108 UNS G10180 is a low-carbon steel with higher manganese content than certain other low-carbon steels. Being richer in manganese, 1018 is a better steel for carburized parts, since it produces a harder and more uniform case. It also has higher mechanical properties and better machining characteristics.
- 1018 (UNS G10180)
- Low-carbon steel
- Cold-rolled, smooth finish
- Excellent machinability
Overview
Cold Rolled Flat Bars are precision-engineered steel products manufactured from specially selected hot-rolled bars to meet the exacting demands of modern industrial applications. This process involves cold drawing oversize hot-rolled bars that have been meticulously cleaned to remove scale, resulting in a product with exceptional dimensional accuracy, superior surface finish, and enhanced mechanical properties. These bars are produced from ASTM A108 UNS G10180 steel, a low-carbon steel known for its higher manganese content compared to other grades like 1020.
The technical foundation of these Cold Rolled Flat Bars makes them a preferred choice for engineers and designers. The cold rolling process imparts a smoother surface and tighter tolerances than hot-rolled alternatives, which is critical for applications where precision is non-negotiable. The specific chemistry of grade 1018, being richer in manganese, contributes to better case hardening characteristics, making it ideal for carburized components that require a hard, wear-resistant exterior and a tough, ductile core. This combination also enhances its machining characteristics, allowing for higher production speeds and improved tool life.
In industrial applications, Cold Rolled Flat Bars are indispensable. They are commonly used in the manufacturing of shafts, pins, spindles, and a wide array of machinery components where consistent quality and reliable performance are paramount. The superior mechanical properties achieved through cold working provide greater strength and hardness in the as-finished condition. This eliminates the need for additional heat treatment in many cases, streamlining production and reducing overall costs.
The advantages of selecting these Cold Rolled Flat Bars are clear for B2B buyers. You benefit from improved straightness, a uniform surface that is ready for plating or painting, and excellent weldability. Their consistent quality ensures repeatable results in high-volume manufacturing, reducing scrap rates and improving efficiency. When you need a reliable, high-performance steel flat bar for critical components, our cold-rolled products deliver the precision and durability your projects demand.
Specifications
- Standard: ASTM A108 (UNS G10180)
- Type: Cold Rolled Flat Bar
- Tolerances: ASTM A108, Commercial Quality or Special Quality
- Straightness: Standard mill tolerances apply; custom straightness requirements available
- Surface Condition: Cold rolled, descaled, smooth finish
- Decarburization: Controlled to standard limits per ASTM A108
- Dimensions: Range of widths (1/2" to 6") and thicknesses (1/8" to 1")
- Lengths: Standard 12' to 20' random mill lengths
Values may vary by mill & heat; verify against the MTR for your order.
Applications
- Machined Components: Gears, sprockets, shafts, and precision machine parts
- Tooling & Fixtures: Jigs, fixtures, gauges, and tool holders
- Automotive Parts: Brackets, supports, and structural components
- Industrial Machinery: Guide rails, wear plates, and support structures
- Construction: Trim, decorative elements, and architectural details
- General Fabrication: Bases, frames, and supports for equipment
- Hardware: Fasteners, brackets, and custom hardware components
Weldability
- Welds readily by MIG, TIG, Stick, or Flux-core processes
- Select filler based on section thickness, joint design, position, and service requirements
- Clean surfaces thoroughly before welding for best results
- Pre-heating generally not required for typical thicknesses
- Post-weld heat treatment may be beneficial for stress relief in critical applications
How to Measure
Flat bars are specified by Width and Thickness (in inches or millimeters). Always specify dimensions as Width x Thickness (e.g., 2" x 1/4"). Provide material grade (ASTM A108 1018), dimensions (W x T), length, finish, and quantity when ordering. Standard dimensional tolerances are per ASTM A108. Tighter tolerances can be specified for precision applications; consult with our technical team. Cold rolled flat bars typically have better surface finish and tighter tolerances than hot rolled equivalents.
Order Checklist
- Dimensions (Width x Thickness) and required length (e.g., 2" x 1/4" x 12')
- Grade (e.g., 1018) and quantity (pieces, feet, or pounds)
- Cutting instructions (standard lengths or custom cuts with tolerance)
- Tolerance requirements (standard commercial or precision)
- Surface finish requirements (as-rolled, polished, plated, etc.)
- Straightness requirements (standard or special)
- Any certifications (Mill Test Report - MTR) required for traceability
- Special handling, packaging, or delivery requirements
| Item Size & Description | Weight (lbs.)/Ft | Select Size | Qty | Price | Actions |
|---|---|---|---|---|---|
| 7.650 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 6.817 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 7.650 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size | ||
| 6.817 |
Choose from predefined sizes or select custom size for manual entry |
Enter quantity between 1 and 999 | Select a Size |
Select a Size
6.817
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
7.650
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
Select a Size
6.817
Choose from predefined sizes or select custom size for manual entry
Enter quantity between 1 and 999
