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 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
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 and C15–C18, cold-drawn bright bar 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 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.