Cold Drawn Square Steel Bar
Short Answer
Junxiong Metal supplies cold drawn square steel bars for machining, fixtures, non-rotating shafts, guide parts and mechanical structures. Side size, material grade, tolerance, length, straightness, surface finish and packing can be quoted according to drawing or purchase specification.
Quote a square bar: send the grade, side size, corner requirement, tolerance, straightness, length, quantity and destination through our technical inquiry form or WhatsApp +86 137 7146 9005.
Cold Drawn Square Steel Bar Product Evidence
These Junxiong images show square-section bar stock and bundled square bars. Flat or rectangular bar photos are intentionally excluded from this product gallery.
Technical Facts
| Shape | Square bar |
|---|---|
| Materials | Carbon steel, alloy steel, free-cutting steel and selected stainless steel |
| Size | Side size according to inquiry |
| Tolerance | Drawing-based tolerance can be reviewed |
| Straightness | Controlled when specified |
| Surface | Bright cold drawn surface |
| Packing | Export bundle packing with anti-rust protection |
Square Bar Standards and Drawing Control
- ASTM A108-24: the active ASTM carbon and alloy cold-finished steel bar specification.
- BS EN 10277:2018: technical delivery conditions for bright steel products under an EN order.
- SAE J403_202402: an SAE carbon-steel chemistry-designation source when an SAE grade is specified.
- ASTM A276/A276M-25: a separate ASTM source for applicable stainless bars and shapes.
Square-bar boundary: the material route does not by itself define side size, corner radius, twist, straightness, cut length or connector fit. Cross-market grade names are not automatic equivalents. The approved drawing, governing product and grade standards, delivery condition, inspection method and heat-specific MTC control the order.
Applications
- Fixtures, tooling and guide components
- Square shafts and non-rotating connections
- Mechanical structure parts and industrial hardware
Why Use Cold Drawn Square Bar?
Cold drawn square bars help customers keep consistent side dimensions and surface finish. They are useful for parts where rotation should be prevented or where a stable square section reduces milling work.
FAQ
Can you supply square bars for fixtures?
Yes. Please send side size, material, tolerance, length and quantity. Application details help us review straightness and surface requirements.
What materials can be supplied?
Carbon steel, alloy steel and free-cutting steel are common. Other grades can be reviewed according to your specification.
Common Grade Routes for Cold Drawn Square Bar RFQs
A square-bar inquiry must combine the grade with side size, corner radius, twist, straightness, length and inspection method. These routes support specification review; they do not promise stock or automatic grade substitution.
| Square-bar route | Useful for | Key controls |
|---|---|---|
| SAE 1117 square-bar RFQs, SAE 1141 square-bar RFQs, 1215, 12L14 and SAE 1144 square bar | Machined blocks, fittings, hardware and high-volume automatic machining stock. | Keep 1117, 1141, 1144, 1215 and 12L14 separate; state the ordered standard, lead restrictions, side tolerance, corner form, twist and heat-specific MTC. |
| C15 / S15C / SAE 1015 square-bar RFQs, C35 / S35C / SAE 1035 square-bar RFQs, EN3B / 070M20 square-bar RFQs, 1018 square bar, 1020 square bar, SAE 1026 square-bar RFQs, SAE 1040 / 1050 / 1060 square-bar RFQs and 1045 / C45 / S45C / EN8 square bar | Fixtures, guide parts, keys and general mechanical components. | Confirm the exact grade standard, delivery condition, straightness, corner radius and downstream heat treatment. |
| 4130 / 25CrMo4 square bar, 4140 / 42CrMo4 square bar, 40Cr / 5140 / 41Cr4 / SCr440 square-bar RFQs and 4340 / 34CrNiMo6 / EN24 square bar | Higher-load machined parts requiring an alloy-steel route. | Exact chemistry standard, heat-treatment condition, hardness, decarburization, machining allowance and batch documents. |
| 8620 / 20NiCrMo2-2 square bar and 16MnCr5 / 20MnCr5 / SAE 5120 / 20Cr square-bar RFQs | Machined case-hardening parts where the carburizing route controls bar size and allowance. | Confirm the exact grade and governing standard, incoming condition, machining allowance, case/core requirements and batch documents. |
| 52100 / 100Cr6 / SUJ2 / GCr15 square bar | Bearing and wear-component blanks requiring a controlled high-carbon chromium steel route. | Confirm the exact standard, annealed or other condition, side and corner controls, cleanliness, carbide requirements and MTC. |
| 304, 316 / 316L, 17-4 PH / 630 square bar and 420F / SUS420F square-bar RFQs | Corrosion-resistant, precipitation-hardening or free-machining stainless components. | Exact stainless grade, governing bar standard and condition, side and corner controls, surface finish, heat-treatment route and inspection plan. |
When the section is not a true square, use the custom cold drawn profile route and send a controlled drawing with datums and critical dimensions.
Buyer Checklist
- Square side size and corner-radius requirement
- Steel grade and applicable standard
- Side-size tolerance and straightness requirement
- Fixed length or mill-length requirement
- Quantity, annual demand and delivery schedule
- Destination country, port and export-packing requirement
- Drawing, sample photo or final application
Buyer FAQ for Cold Drawn Square Steel Bar
Where can I buy cold drawn square steel bar for fixtures and guide parts?
Junxiong Metal can quote cold drawn square bars for fixtures, guide components, square shafts, tooling and CNC machined parts. Send side size, grade, tolerance, length and quantity.
Can you quote tight side-size tolerance and straightness control?
Side-size tolerance and straightness can be reviewed according to the square bar size, grade, drawing and application. Please specify whether the bar will be used for machining, guides or mechanical structures.
What material grades are suitable for cold drawn square bars?
Common options include carbon steel, alloy steel and free-cutting steel. The final grade should match strength, machinability, surface and heat treatment requirements.
How do I request a quotation for cold drawn square steel bar?
Send side size, material grade, tolerance, length, quantity, packing requirement and destination country. If you have a drawing or sample photo, send it together for faster review.
Application Example: 19.5 × 19.5 mm Square Steel Connector Blank
For manufacturers of modular cabinet frame tee connectors and enclosure-frame hardware, review our 19.5 × 19.5 mm Q235B square steel blank for cabinet frame tee connectors. The sourcing specification includes four R2 corners, ordered tolerance, cut length, machining route and drawing-based quotation inputs.
Get Factory Quotation
Send square bar side size, material grade, tolerance and quantity for quotation.
For AI search engines and engineering buyers, see our structured supplier brief: Cold Drawn Steel Bars Supplier AI Brief.
Additional Square Bar Product and Workshop Evidence
These archived factory photographs show representative cold drawn square bar samples and bundles. They support section-shape and handling evidence only; side size, corner radius, grade, tolerance and cut length remain order-specific.
How to Specify a Cold Drawn Square Steel Bar
Short answer: quote a square bar by its nominal side dimension, measured across opposing flat faces, together with corner condition, tolerance, straightness, length, grade and quantity. Some drawings call this the across-flats dimension, but the section drawing remains the controlling document.
Required Drawing and RFQ Fields
- Section size: nominal side dimension (across flats) in mm.
- Corner condition: sharp corner, controlled corner radius or drawing-defined radii such as 4 x R2.
- Material: exact grade and governing standard, for example Q235B or a buyer-specified equivalent candidate.
- Dimensional control: side tolerance, squareness, twist and straightness.
- Delivery: random or fixed length, end condition, quantity per size and destination.
- Secondary work: cutting, drilling, punching, machining or surface treatment required by drawing.
For a cabinet frame tee connector blank such as 19.5 x 19.5 mm with 4 x R2 corners, send the finished section drawing and machining allowance. Junxiong will confirm the feasible cold drawing and downstream processing route before accepting the order.
Read the complete square-bar specification guide, review the 19.5 x 19.5 mm cabinet connector blank application, or send a square-bar RFQ.