SS 303 equivalents, chemistry & properties.
Browse reference information for SS 303, including related designations, composition, mechanical properties and density. Confirm the governing standard, product form and condition for your order.
SS 303 equivalent grades
- USA (ASTM / AISI / SAE)
- AISI 303
- UNS
- S30300
- Europe (EN)
- X8CrNiS18-9
- Werkstoff No. (W.Nr)
- 1.4305
- UK (BS)
- 303S31 (EN-associated cross-reference)
- Japan (JIS)
- SUS303
- China (GB)
- Y12Cr18Ni9 / S30317
Key data
- Family
- Austenitic stainless
- Density
- 7.93 g/cm³
- Typical mechanical
- Free-machining; chemistry and properties are standard-specific; lower corrosion resistance than 304
- Typical uses
- Turned parts, shafts, fittings, fasteners
- Weight
- Calculate weight in SS 303
SS 303 chemical composition (weight %)
ASTM A582/A582M-22 Type 303 / UNS S30300 bar
| C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| ≤0.15 | ≤1.00 | ≤2.00 | ≤0.20 | 0.15–0.35 | 17.0–19.0 | 8.0–10.0 |
EN 10088-3:2023 X8CrNiS18-9 / 1.4305 bar (separate chemistry)
| C | Si | Mn | P | S | Cr | Ni | Cu | N |
|---|---|---|---|---|---|---|---|---|
| ≤0.10 | ≤1.00 | ≤2.00 | ≤0.045 | 0.15–0.35 | 17.0–19.0 | 8.0–10.0 | ≤1.00 | ≤0.11 |
JIS G 4303:2021 SUS303 hot-worked bar (separate chemistry)
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| ≤0.15 | ≤1.00 | ≤2.00 | ≤0.20 | ≥0.15 | 17.0–19.0 | 8.0–10.0 | ≤0.60 |
GB/T 1220-2007 Y12Cr18Ni9 / S30317 bar (separate chemistry)
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| ≤0.15 | ≤1.00 | ≤2.00 | ≤0.20 | ≥0.15 | 17.0–19.0 | 8.0–10.0 | ≤0.60 |
Grades similar to SS 303
Frequently asked questions
What is the equivalent of SS 303?
SS 303 equivalents: USA (ASTM / AISI / SAE) AISI 303; UNS S30300; Europe (EN) X8CrNiS18-9; Werkstoff No. (W.Nr) 1.4305; UK (BS) 303S31 (EN-associated cross-reference); Japan (JIS) SUS303; China (GB) Y12Cr18Ni9 / S30317. Equivalents are close but not always identical; check the standard on your order.
What is the chemical composition of SS 303?
SS 303 (ASTM A582/A582M-22 Type 303 / UNS S30300 bar): C ≤0.15, Si ≤1.00, Mn ≤2.00, P ≤0.20, S 0.15–0.35, Cr 17.0–19.0, Ni 8.0–10.0 (weight %).
What is the density of SS 303?
About 7.93 g/cm³ (7,930 kg/m³), the value used for weight calculations.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Need SS 303?
Steel Impex India, Mumbai, supplies SS 303 in pipes, plates, sheets, bars and fittings as available. Send the grade, standard, size and quantity.