← Glossary

1.0038

S235JR

1.0038 (S235JR) is a plain [[element:C|carbon]] structural steel: easy to weld, cheap, and the workhorse in steel construction. The 'S' denotes the guaranteed [[glossary:streckgrenze|yield strength]] in MPa — S355 holds at least 355 MPa. Typical composition: 0.17 % C, 1.2 % Mn, 0.2 % Si. For higher [[glossary:verschleissschutz|wear protection]], three hard-facing options are available: S Fe 1 (martensitic, approx. 300–400 HB, machinable), S Fe 2 (wear-resistant and tough, approx. 50–55 HRC, conditionally machinable) and S Fe 15 ([[glossary:karbid|carbide]]-rich, approx. 55–65+ HRC, not machinable).

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