Product Overview
Round bar is rolled from continuously cast billet through roughing, intermediate and finishing stands plus a sizing mill, which keeps it round and holds size along the bar – front and tail tensile values normally stay within 30 MPa of each other. As a general machining steel it turns, drills and thread rolls as rolled, or can be normalised to refine grain; where tight dimensional control is needed we supply peeled and centreless ground bright bar.
Specifications
| Parameter | Value |
|---|---|
| Diameter | 6 – 200 mm |
| Standard lengths | 6 m / 9 m / 12 m |
| Steel grade | ASTM A36 / Q235B / SS400 / 20# |
| Yield strength | min 235 MPa |
| Tensile strength | 400 – 550 MPa |
| Elongation | min 20% |
| Diameter tolerance | +/- 0.3 – 1.2 mm by size band |
| Ovality | max 50% of diameter tolerance |
| Straightness | max 4 mm/m |
| Surface | Rolled black / peeled and ground on request |
Applications
Used to machine drive shafts, lead screw blanks, bolt and nut blanks, hydraulic piston rods from peeled stock, agricultural machinery parts and conveyor rollers. Automotive parts plants take 20-60 mm for cold heading and turning, while construction machinery makers use 80-200 mm for pins and bushings.
Packing / Delivery / Payment
Shipped bare in 2-5 ton bundles with steel straps and timber dunnage, cut to length or chamfered as required; a 20GP holds about 25 tons. Stock ships in 7-15 days, rolling orders in 20-30 days, and peeled material adds 10 days. Payment by L/C at sight or T/T with 30% deposit. Mill certificate, packing list, invoice and Certificate of Origin are provided, and third-party material re-testing can be arranged.