1095 equivalent grades: ASTM, EN, JIS, GB, DIN

Cross-reference for 1095 across standard systems. Each match is graded so you can see how safe the substitution is. High-carbon steel (spring / knife / blade steel) — full 1095 data sheet.

Cross-reference table

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.

1095 in BS (superseded British)

• CS100 — Identical BS 1449 CS100 carbon spring strip.

1095 in EN (European)

• C100S — Identical 1.1274 (EN 10132-4 spring strip): C 0.95–1.05, Mn 0.30–0.60, Si 0.15–0.35.
• C90S / C98S — Near 1.1217 / 1.1233 — adjacent carbon steps in EN spring-strip grades.

1095 in JIS (Japan)

• SK95 (SK4) — Identical JIS G4401 SK95: C 0.90–1.00, Mn 0.10–0.50 — the Japanese knife/saw grade; SK85 (SK5) is the 0.85 % C step.

1095 in AISI / SAE

• W1 — Near AISI W1 water-hardening tool steel at 0.95–1.05 % C is chemically the same, supplied to tool-steel cleanliness (ASTM A686).
• 1084 / 1084 — Near 0.84 % C: near-eutectoid, more forgiving heat treatment, slightly tougher — the beginner knifemaker's alternative.
• 5160 — Functional 0.6 % C, 0.8 % Cr spring steel: far tougher, less edge retention — for swords, leaf springs and choppers.
• O1 — Functional Oil-hardening tool steel (1.2510): deeper hardening, better wear, easier quench — the tool-shop upgrade.
• 52100 — Functional Plain 0.95 % C: similar hardness, much lower hardenability, no chromium carbides — cheaper knife/spring alternative.

1095 in GB/T (China)

• T9A / T10A — Near GB/T 1298 T10A: C 0.95–1.04, Mn ≤ 0.40 — Chinese carbon tool steel; T9A at 0.85–0.94.

1095 in GOST (Russia/CIS)

• U9A / U10A — Near GOST 1435 U10A: C 0.95–1.09, Mn 0.17–0.33 (tool steel); 65G/70S2A are the spring steels.

Superseded names for 1095

• C1095 — AISI (pre-1960s): Still printed on knife blanks and saw blades.
• G10950 — UNS
• CS95 / CS100 — BS 1449 (withdrawn): Carbon spring strip.
• Ck101 / C100S — DIN 17222 / EN 10132-4: Cold-rolled spring strip.
• SK4 / SK95 — JIS G4401: SK4 (old) = SK95 (2000+).
• W1 (near) — AISI tool steel: W1 (0.6–1.4 % C water-hardening tool steel) — the same steel with tool-steel quality control.

Key data for 1095

Full composition, mechanical properties by thickness, heat treatment and applications for 1095 →

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