Material number 1.0037: St37-2
1.0037 is the European material number (Werkstoffnummer, EN 10027-2) for St37-2, general structural steel (DIN 17100, withdrawn) — today S235JR specified in DIN 17100.
What 1.0037 means
EN 10027-2 material numbers have the form 1.XXYY: the leading 1 is steel; the next two digits give the steel group (00 → base steels); the last two digits are a sequential number within that group. The number is unique to one composition and survives name changes, which is why 1.0037 has stayed constant while the symbolic name moved from St37-2 → S235JR (1.0038) to St37-2.
St37-2 at a glance
St37 is the most-searched steel name that no longer exists in any current standard. DIN 17100 defined St37-2 (number 1.0037) as a general structural steel with 37 kp/mm² — about 360 MPa — minimum tensile strength and 235 MPa yield; the standard was withdrawn in 1994 when EN 10025 replaced it with S235JR (1.0038). Thirty years later the old name survives on drawings, in Turkish, Polish, Iranian and Gulf specifications, and in everyday speech across the German-speaking world.
This page exists to make the translation exact. DIN 17100 had five St37 variants that differed in deoxidation and impact testing — USt37-2 (rimmed), RSt37-2 (killed), St37-2 (either), St37-3 U (27 J at +20 °C) and St37-3 N (27 J at −20 °C) — and EN 10025 mapped them onto S235JRG1, S235JRG2, S235JR, S235J0 and S235J2. Since 2004 only S235JR, S235J0 and S235J2 remain.
The practical rule: a requirement for St37-2 is met by S235JR, for St37-3 U by S235J0 and for St37-3 N by S235J2. The tables below give the original DIN values, the current EN values, and the graded ASTM, JIS, GB and GOST cross-references.
Full data sheet for St37-2 → · Equivalent grades →