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; depends on dimension and heat treatment.
Available forms.
Size range: Ø 3 – 100 mm
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 is the European (EN) designation, while C22, S20C are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; 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.
What is 1020 used for?
Typical applications include Light machine parts, Pins & shafts, Case-hardening base, General fabrication.