S235JR is the same material your supplier may list as ASTM A36 or JIS SS400. This page maps the designations across standards and gives the ISO P-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | S235JR |
| Werkstoffnummer | 1.0038 |
| AISI / ASTM / UNS (US) | ASTM A36 (nearest) |
| JIS (Japan) | SS400 (nearest) |
Compiled from the public standard designation systems (EN 10027, SAE/AISI, ASTM, UNS, JIS). Entries marked “nearest” are the closest commonly-cited counterpart, not a drop-in equivalent. Always verify against the material certificate.
At least one designation on this page is a nearest commonly-cited counterpart rather than a same-composition equivalent (structural and cast grades are specified by properties, not chemistry). Confirm suitability against the material certificate and the drawing requirement, not this table alone.
Structural grades are specified by strength, not composition, so cross-standard matches are nearest-by-property. Machines like any low-carbon steel: watch built-up edge, favour sharp positive geometry.
| ISO group | Starting Vc (coated carbide, turning) | Feed fn |
|---|---|---|
| P P · Steel | 150–350 m/min · 490–1150 sfm | 0.1–0.5 mm/rev · .004–.020 ipr |
Group-level starting range from our speeds & feeds guide; convert to RPM with the speeds & feeds calculator. Condition, subgroup and operation shift the number — the material page has the detail: ISO P · Structural steel.
Related materials: C15 / AISI 1015 · S355J2 / A572 Gr. 50
S235JR (Werkstoffnummer 1.0038) corresponds to ASTM A36 (nearest) as the nearest commonly-cited counterpart — check the certificate before substituting. In JIS terms the counterpart is SS400 (nearest).
It is an ISO P-group material, so the starting window is 150–350 m/min · 490–1150 sfm at 0.1–0.5 mm/rev · .004–.020 ipr for coated-carbide turning, adjusted for condition and operation. For a grounded, brand-neutral pick — grade, geometry and cutting data across 13 brands — ask the advisor.
Not automatically: this pairing is nearest-by-properties, and structural or cast grades are specified by mechanical requirements. The drawing standard and the material certificate decide, not the cross-reference table.
Knowing the material is half the job; picking the grade and cutting data for the operation is the other half. That is what the advisor does, grounded in catalog data and honest when there is no verified match.