Quality	Standard	Material No.	Past names
S235JR	DIN EN 10025-2	1.0038	RSt 37-2, St 37-2

Testing direction	Yield strength ReH (MPa) ≤ 16 mm	Yield strength ReH (MPa) > 16 ≤ 40 mm	Tensile strength Rm (MPa) < 3 mm	Tensile strength Rm (MPa) ≥ 3 mm ≤ 100 mm
Transversal (≥ 600mm)	≥ 235	≥ 225	360 – 510	360 – 510

Sample direction a	Elongation A80 (in %) ≤ 1 mm	A80 (in %) > 1 ≤ 1,5 mm	A80 (in %) > 1,5 ≤ 2 mm	A80 (in %) > 2 ≤ 2,5 mm	A80 (in %) > 2,5 ≤ 3 mm	A5,65 (in %) > 3 ≤ 40 mm
l	≥ 17	≥ 18	≥ 19	≥ 20	≥ 21	≥ 26
t	≥ 15	≥ 16	≥ 17	≥ 18	≥ 19	≥ 24

The unalloyed structural steel S235JR is the universal base material for modern steel and mechanical engineering. It combines high availability with excellent cost-effectiveness and offers engineers a balanced ratio between strength, toughness and workability.

S235JR already offers stable mechanical properties in its standard state. Depending on the requirements for the microstructure and further processing, various delivery conditions are available:

For engineers, excellent weldability is crucial. Thanks to its low carbon equivalent (CEV), all common welding processes (MAG, MIG, manual arc welding) can be used without complex preheating. This minimizes the risk of cold cracking and reduces manufacturing time in the workshop – a direct cost advantage for purchasing departments.

With a guaranteed impact strength of 27 J at +20 °C (grade group JR), the steel offers sufficient toughness against brittle failure under dynamic loads in the usual temperature range.

Thanks to its versatility, the S235JR is at home in almost all areas of technology:

Efficiency meets reliability: S235JR is the “all-purpose weapon” in steel construction. While engineers appreciate its predictable mechanical properties and straightforward processing, purchasing departments benefit from its global availability and optimal price-performance ratio.