Cold Drawn Square Steel
Precision bright square bar in 4×4–120×120 mm — sharp corners, consistent cross-section, ready for machining and fabrication.
Cold drawn square steel is produced by drawing hot rolled square bar through a precision die at room temperature, resulting in four accurately formed sides, sharp well-defined corners, a bright oxide-free surface and consistent dimensions along the full length. These properties make cold drawn square steel a preferred raw material for machine components, frames and precision fabrication where squareness and dimensional stability matter.
Suzhou Zhenfu Cold-Drawn Steel Co., Ltd. produces cold drawn square steel from 4×4 mm to 120×120 mm in carbon, low-alloy and free-cutting grades, with custom intermediate sizes, cut lengths and special tolerances available. As a factory-direct manufacturer with over 18 years of experience, we control sourcing, drawing, annealing, straightening, inspection and export packaging under one roof.
Size Range at a Glance
| Side length | 4×4 mm – 120×120 mm (custom intermediate sizes available) |
|---|---|
| Length | Cut to length as specified; standard 6 m, custom lengths available |
| Tolerance | Per GB/T 905 / EN 10277 / ASTM A108 — full tolerance tables and technical data on the product detail page |
| Corner quality | Sharp, well-defined corners; consistent cross-section |
| Surface | Bright, smooth, oxide-free |
| Packaging | Five-layer rust-proof export packaging (oil, kraft paper, film, strapping, fumigated pallet) |
Available Grades
Common grades include Q235, 45#, Q355, 40Cr and 42CrMo, supplied to GB standards with comparable JIS, EN and ASTM equivalents. For structural frames choose Q235; for machine components 45#; for high-strength or quenched and tempered parts, Q355, 40Cr or 42CrMo.
Full grade comparison tables (GB ↔ JIS ↔ EN ↔ ASTM) are available on the product detail page.
Applications
Cold drawn square steel is widely used for machine frames, structural components, guide bars, shafts, tooling, stamping blanks and precision fabrication. Typical end-use industries include:
Machinery and equipment — frames, guide components, machine tool parts, equipment brackets
Construction machinery — structural members and reinforcement bars for heavy equipment
Agricultural machinery — frames and structural parts exposed to regular loading
General hardware — tooling, mould blanks, brackets and stamping materials
Why Choose Cold Drawn Square Steel
Four accurate sides reduce secondary machining and material waste
Consistent cross-section improves clamping and machining stability
Bright surface is ready for plating or direct assembly
Uniform hardness between batches supports repeatable production
Cold Drawn Square Steel FAQ
Which square steel grade should I choose?
For structural frames and general parts, Q235 is the economical choice. For machined machine components, 45# provides better strength and machinability; for high-strength service, Q355 or alloy grades such as 40Cr and 42CrMo are recommended.
Why choose cold drawn square steel over hot rolled?
Cold drawing gives sharper corners, tighter tolerance and a brighter surface, so machining allowances are smaller and parts come out more consistent. For applications that need precise squareness, it lowers total processing cost.
Can you supply square steel in alloy grades?
Yes, we produce 40Cr, 42CrMo, 20CrMnTi and other alloy grades on a production basis, with MTC documentation and third-party inspection available.
Can the corners be custom-defined?
Standard cold drawn square steel has sharp corners; special corner radii or profiles can be discussed based on your drawing. Send us your requirement and our engineers will confirm feasibility.
What is your delivery time?
Stock sizes ship within 3–7 days; production orders follow a fixed schedule with guaranteed ocean shipping dates. We support FCL, LCL and small trial orders.
Related:Cold Drawn Round Steel Cold Drawn Flat Steel Cold Drawn Special Section Steel Square Steel Product Detail
Send your side length, grade, length and quantity — we will confirm price and delivery within 24 hours.
