Carbon Steel
1018 · 1.0453
Also known as C15–C18 / cold-drawn bright bar
Low-carbon free-machining-friendly steel, popular as bright bar.
AISI 1018 is a low-carbon steel with a good balance of strength, ductility and machinability, one of the most popular grades for cold-drawn (bright) bar in precision turned parts, pins and shafts.
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 | 0.15 – 0.20 |
| Mn | 0.60 – 0.90 |
| 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.
- Turned & machined parts
- Pins & shafts
- Fasteners
- Case-hardening base
FAQ.
What is 1018?
AISI 1018 is a low-carbon steel with a good balance of strength, ductility and machinability, one of the most popular grades for cold-drawn (bright) bar in precision turned parts, pins and shafts.
Is 1018 the same as C15–C18?
Yes — 1018 is the European (EN) designation, while C15–C18, cold-drawn bright bar 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 1018?
1018 corresponds to 1018 (AISI / SAE), C15 / C18 (near) (EN), S15C–S18C (near) (JIS). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 1018 available?
1018 is supplied as Bright / cold-drawn bar, Round bar, Hexagonal bar, in Ø 3 – 100 mm.
What is 1018 used for?
Typical applications include Turned & machined parts, Pins & shafts, Fasteners, Case-hardening base.