Steel Standart

1018 equivalent grades: ASTM, EN, JIS, GB, DIN

Cross-reference for 1018 across standard systems. Each match is graded so you can see how safe the substitution is. Low-carbon steel, cold-finished bar (case-hardenable) — full 1018 data sheet.

Cross-reference table

1018 equivalents by system
GradeSystemMatchWhy / differences
080A17BS (superseded British)IdenticalBS 970 080A17: C 0.15–0.20, Mn 0.70–0.90.
1020AISI / SAENearC 0.18–0.23, Mn 0.30–0.60: slightly higher carbon, lower Mn; used interchangeably for many parts.
1015 / 1010AISI / SAENearLower-carbon cold-heading grades.
C15 / C15EEN (European)NearC 0.12–0.18, Mn 0.30–0.60 — lower Mn; the case-hardening equivalent. C16E (1.1148) and C20/C22 are also quoted.
S235JRC / C22EN (European)NearEN 10277 bright bar S235JRC (1.0122) is the general-purpose cold-drawn substitute; C22 (C 0.17–0.24) the closer chemistry.
C15EN (European)NearC 0.15–0.20, Mn 0.60–0.90; the US stock grade most often supplied against a C15 request.
20GB/T (China)NearGB/T 699 grade 20 (20#): C 0.17–0.23, Mn 0.35–0.65 — slightly higher C, lower Mn.
20 / 18kpGOST (Russia/CIS)NearGOST 1050 Steel 20: C 0.17–0.24, Mn 0.35–0.65.
S15C / S17C / S20CJIS (Japan)NearJIS G4051 S17C (C 0.15–0.20, Mn 0.30–0.60) is closest on carbon; S20C on strength.
12L14AISI / SAEFunctionalFree-machining leaded steel for high-volume screw-machine parts (not weldable, not case-hardenable).
A36ASTM / ASMEFunctionalStructural plate/shape with guaranteed 250 MPa yield — the alternative for welded structures; 1018 is a bar product with no guaranteed properties.

Identical = same composition and mechanical limits within rounding. Near = one limit differs (e.g. carbon max or impact temperature). Functional = interchangeable for most uses after an engineering check.

How the matches are graded

Identical means the chemical composition windows overlap so that material certified to one specification meets the other without deviation, and the mechanical minimums are the same or the other is inside them — mills usually dual-certify. Near means one limit differs (a carbon maximum, an impact temperature, a strength minimum or a delivery condition) and a substitution needs a one-line engineering check. Functional means the grades serve the same purpose but are not the same steel — a designer can often use one for the other, but only after re-checking the design.

1018 in BS (superseded British)

  • 080A17 — Identical BS 970 080A17: C 0.15–0.20, Mn 0.70–0.90.

1018 in AISI / SAE

  • 1020 — Near C 0.18–0.23, Mn 0.30–0.60: slightly higher carbon, lower Mn; used interchangeably for many parts.
  • 1015 / 1010 — Near Lower-carbon cold-heading grades.
  • 12L14 — Functional Free-machining leaded steel for high-volume screw-machine parts (not weldable, not case-hardenable).

1018 in EN (European)

  • C15 / C15E — Near C 0.12–0.18, Mn 0.30–0.60 — lower Mn; the case-hardening equivalent. C16E (1.1148) and C20/C22 are also quoted.
  • S235JRC / C22 — Near EN 10277 bright bar S235JRC (1.0122) is the general-purpose cold-drawn substitute; C22 (C 0.17–0.24) the closer chemistry.
  • C15 — Near C 0.15–0.20, Mn 0.60–0.90; the US stock grade most often supplied against a C15 request.

1018 in GB/T (China)

  • 20 — Near GB/T 699 grade 20 (20#): C 0.17–0.23, Mn 0.35–0.65 — slightly higher C, lower Mn.

1018 in GOST (Russia/CIS)

  • 20 / 18kp — Near GOST 1050 Steel 20: C 0.17–0.24, Mn 0.35–0.65.

1018 in JIS (Japan)

  • S15C / S17C / S20C — Near JIS G4051 S17C (C 0.15–0.20, Mn 0.30–0.60) is closest on carbon; S20C on strength.

1018 in ASTM / ASME

  • A36 — Functional Structural plate/shape with guaranteed 250 MPa yield — the alternative for welded structures; 1018 is a bar product with no guaranteed properties.

Superseded names for 1018

  • C1018 — AISI (pre-1960s prefix): C = basic open-hearth; still used in catalogues.
  • G10180 — UNS
  • 080A17 / 080M15 — BS 970
  • C15 / C20 — EN 10084 / 10083: Bracketing European grades.
  • St 37-3 K (bright bar) — DIN 1652 (withdrawn): German bright-bar equivalent, now EN 10277 S235JRC / C15.

Key data for 1018

Yield≈ 370 MPa Cold drawn (as drawn), 16–22 mm — typical
Tensile≈ 440 MPa
Carbon0.15 – 0.2 %
StandardASTM A29

Full composition, mechanical properties by thickness, heat treatment and applications for 1018 →

Verified against ASTM A29/A29M-20 (SAE J403 chemistry). Last checked: September 2026.