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Structural Steel

Quality Fe360 – S235JrC profili tondo piatto quadrato

This steel has substantial toughness, excellent workability and weldability, mediocre mechanical strength, good heat resistance, fair hardness and poor humidity resistance. It is suitable for economic parts of machines and metallic structures that are generally not very stressed and do not have demanding features. It is generally used cold drawn.

Chemical composition

C max C max C max Mn P S Si N
≤ 16 mm > 16 ≤ 40 mm > 40 mm max max max max max
0,17 0,17 0,20 0,40 0,045 0,045 0,00 0,009

Mechanical properties

Thickness mm Hardness HB Rm (MPa) Rp 0,2 minimum (MPa) Rm (MPa) A5 % minimum
≥ 5 ≤ 10 - - 355 from 470 to 840 8
> 10 ≤ 16 - - 300 from 420 to 770 9
> 16 ≤ 40 from 102 to 140 from 360 to 510 260 da 390 to 730 10
> 40 ≤ 63 from 102 to 140 from 360 to 510 235 from 380 to 670 11
> 63 ≤ 100 from 102 to 140 from 360 to 510 215 from 360 to 640 1

Quality Fe510D – S355J2 profilo tondo

Structural steel for excellence, with high mechanical strength and excellent resilience. It is suitable for use in extreme conditions and in cold temperatures to -20°C. It is also suitable for metallic structures, cranes, machinery frames, etc.

Chemical composition

C max C max C max Mn P S Si N
≤ 16 mm > 16 ≤ 40 mm > 40 mm max max max max max
0,20 0,20 0,22 1,60 0,025 0,025 0,55 0,55

Mechanical properties

Yield point, Reh (MPa) min 355 355 345 335 325 135 295 285 275 265
Tensile strength Rm(MPa) min 510 470 470 470 470 470 450 450 450 450
Tensile strength Rm(MPa) max 680 630 630 630 630 630 600 600 600 600
Elongation A(%) min 22 22 22 21 20 20 18 17 17 17
Resilience Kv -20°C (J) min 27 27 27 27 27 27 27 27 27 27

Experience and professionalism are the values needed to be able to supply steel. Rettacciai stands out for bar grinding, cutting to size and the wide range of products in stock.


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