Carbon Steel
1020 · 1.0402
Also known as C22 / S20C
Low-carbon steel for cold-drawn bar and light machine parts.
AISI 1020 (near EN C22 / 1.0402) is a low-carbon steel with good weldability and formability, widely supplied as cold-drawn (bright) bar for lightly stressed parts and as a base for case hardening.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10277. Mill certificate governs.
| Element | % |
|---|---|
| C | 0.18 – 0.23 |
| Mn | 0.30 – 0.60 |
| P | ≤ 0.040 |
| S | ≤ 0.050 |
Mechanical properties.
Indicative values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: Ø 3 – 100 mm · flats, plates & sheet to specification
Typical applications.
- Light machine parts
- Pins & shafts
- Case-hardening base
- General fabrication
FAQ.
What is 1020?
AISI 1020 (near EN C22 / 1.0402) is a low-carbon steel with good weldability and formability, widely supplied as cold-drawn (bright) bar for lightly stressed parts and as a base for case hardening.
Is 1020 the same as C22?
Yes — 1020 and C22, S20C are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so the mill certificate governs the exact specification.
What are the international equivalents of 1020?
1020 corresponds to 1020 (AISI / SAE), C22 (1.0402) (EN), S20C (JIS). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 1020 available?
1020 is supplied as Bright / cold-drawn bar, Round bar, Flat bar, in Ø 3 – 100 mm (bar diameter; flats, plates and sheet are quoted to specification).
What is 1020 used for?
Typical applications include Light machine parts, Pins & shafts, Case-hardening base, General fabrication.