Stainless round bar for shafts, pins, fasteners, valve stems and machined components. Bright bar is centreless ground for a ready-to-machine surface; hot rolled black bar suits forging and heavy turning.
| Grades available | 304 / 316L / 410 / 431 / 303 |
|---|---|
| Sizes | 4 mm to 300 mm dia |
| Finish | Black, peeled, centreless ground |
| Minimum order | 100 kg |
| Standard | ASTM A276 / A479 |
| Grades | 303, 304, 316L, 410, 420, 431, 17-4 PH |
| Tolerance | h9 / h11 on bright bar |
| Length | 3 – 6 m, cut to size free above 500 kg |
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Get quote on WhatsAppEnter your size and we work out the theoretical weight using the density of the grade you pick.
Theoretical weight only. Mill rolling tolerance normally makes the delivered weight differ by 2–5%; we invoice on actual weighbridge weight.
What the metal is actually made of, as specified by the standard.
Free-machining 304 — added sulphur breaks the chip. Fast on the lathe, but weaker corrosion resistance and poor for welding.
Strip shows the mid-point of each specified range, with iron as balance. The table below is the full specification.
| Element | Name | Specified % by weight | |
|---|---|---|---|
| C | Carbon | ≤ 0.150 | |
| Mn | Manganese | ≤ 2.00 | |
| Si | Silicon | ≤ 1.00 | |
| P | Phosphorus | ≤ 0.200 | |
| S | Sulphur | 0.15 – 0.35 | deliberately added |
| Cr | Chromium | 17.00 – 19.00 | |
| Ni | Nickel | 8.00 – 10.00 | |
| Mo | Molybdenum | ≤ 0.600 | |
| Fe | Iron | Balance | ≈ 70.8% |
Limits as per ASTM A582. Always confirm against the mill test certificate for your consignment.
Cut-to-length, slitting and custom sections are done in-house. Send the drawing or the dimensions and we will confirm price and lead time.