Steel grades, standards and equivalents — one reference
Look up any steel by grade name, material number or UNS number and get the composition, the mechanical properties by thickness or condition, the heat treatment, the old names — and a graded cross-reference to every other system.
52 grades · 26 standards · 12 comparisons · Data edition: September 2026.
Browse by designation system
EN (European)EN 10025, 10088, 10083 … with Werkstoff numbers (1.xxxx)ASTM / ASMEA36, A240, A516 … and ASME SA equivalentsAISI / SAE1018, 4140, 304, 316 … with UNS numbersJIS (Japan)SS400, S45C, SUS304, SPCC …GB/T (China)Q235, Q345/Q355, 45#, 40Cr …DIN (superseded German)St37, St52, Ck45, X5CrNi18-10 — replaced by EN, still specifiedBS (superseded British)BS 4360 43A/50B, BS 970 080M40 …GOST (Russia/CIS)St3sp, 09G2S, 40Kh, 12Kh18N10T …IS (India)IS 2062 E250/E350, IS 1079, IS 513 …
Browse by steel family
Structural steelCarbon steelAlloy steelStainless steelTool steelPressure vessel steelCold-rolled & coated sheetPipe & tube steelBearing steelSpring steelCase-hardening steelQuenched & tempered steel
Most-looked-up grades
304 · S30400Austenitic chromium-nickel stainless steel · yield ≥ 205 MPa
316 · S31600Austenitic chromium-nickel-molybdenum stainless steel · yield ≥ 205 MPa
4140 · G41400Chromium-molybdenum low-alloy steel (chromoly) · yield ≈ 415 MPa
S235JR · 1.0038Non-alloy hot-rolled structural steel · yield 235 MPa
S355J2 · 1.0577Non-alloy hot-rolled structural steel, −20 °C impact · yield 355 MPa
1.4301 · 1.4301Austenitic Cr-Ni stainless steel · yield ≥ 230 MPa
A36 · K02600Carbon structural steel · yield 250 MPa
1018 · G10180Low-carbon steel, cold-finished bar (case-hardenable) · yield ≈ 370 MPa
42CrMo4 · 1.7225Chromium-molybdenum steel for quenching and tempering · yield 900 MPa
C45 · 1.0503Medium-carbon steel for quenching and tempering · yield 340 MPa
1045 · G10450Medium-carbon steel, hardenable · yield ≈ 310 MPa
DD11 · 1.0332Hot-rolled low-carbon steel for cold forming · yield 170–360 MPa
DC01 · 1.0330Cold-rolled low-carbon steel for cold forming · yield 140–280 MPa
2205 · S32205Ferritic-austenitic (duplex) stainless steel · yield ≥ 450 MPa
1.4404 · 1.4404Austenitic Cr-Ni-Mo stainless steel, low carbon · yield ≥ 240 MPa
A572 Grade 50 · K02303High-strength low-alloy (HSLA) columbium-vanadium structural steel · yield 290 MPa
52100 · G52986High-carbon chromium bearing steel · yield ≈ 450 MPa
1095 · G10950High-carbon steel (spring / knife / blade steel) · yield ≈ 380 MPa
P265GH · 1.0425Non-alloy steel for pressure purposes with elevated-temperature properties · yield 265 MPa
St37-2 · 1.0037General structural steel (DIN 17100, withdrawn) — today S235JR · yield 235 MPa
Full steel grades chart (52 grades) →
Head-to-head comparisons
1.4301 vs 1.44041.4301 vs 1.4404 (V2A vs V4A): 1.4404 adds 2–2.5 % Mo for chloride resistance (PREN 24 vs 18), costs…1018 vs 41401018 vs 4140 steel: cold-drawn 1018 ≈ 370 MPa yield, not hardenable, weldable; 4140 ≈ 415 MPa anneal…1045 vs 41401045 vs 4140: same 0.45 % carbon, but 4140's Cr-Mo gives deep hardenability (50–75 mm vs 20 mm), hig…304 vs 316304 vs 316 stainless steel: 316 adds 2–3 % molybdenum for chloride resistance (PREN 24 vs 18) at 20–…A36 vs 1018A36 vs 1018: A36 is an ASTM structural spec (≥ 250 MPa yield, loose chemistry, plate/shapes); 1018 i…A36 vs A572 Grade 50A36 vs A572 Grade 50: yield 250 vs 345 MPa (36 vs 50 ksi), tensile 400–550 vs ≥ 450 MPa, price +3–8 …A36 vs S235JRA36 vs S235JR: US and EU mild structural steels — yield 250 vs 235 MPa, tensile 400–550 vs 360–510 M…DC01 vs DX51DDC01 vs DX51D: DC01 is uncoated cold-rolled sheet (EN 10130, yield 140–280 MPa, 28 % elongation); DX…DC01 vs S235JRDC01 vs S235JR: DC01 is cold-rolled forming sheet (EN 10130, yield 140–280 MPa, no minimum guarantee…S235JR vs P265GHS235JR vs P265GH (and P235GH): structural vs pressure-vessel steel — similar strength (235–265 MPa y…S235JR vs S355J2S235 vs S355: yield 235 vs 355 MPa, tensile 360–510 vs 470–630 MPa, price +5–10 %, weldability CEV 0…St37 vs St52St37 vs St52 (DIN 17100): yield 235 vs 355 MPa, tensile 340–470 vs 490–630 MPa. Both withdrawn — tod…
How equivalence is graded here
Every cross-reference on this site is rated Identical (composition windows overlap and mechanical minimums match — mills dual-certify), Near (one limit differs: carbon max, impact temperature, strength class — check before substituting) or Functional (serves the same purpose but is a different steel — re-check the design). The reason for the rating is written next to each match, so a buyer can defend the substitution and an engineer can see what to verify.