Round bar drawn h9 diameter 50 mm 1.0579 - S355J2C - 11 523

Basic Designation

• EN/DIN: S355J2C

• Numeric designation (EN): 1.0579

• ČSN/STN: 11 523

• Category: Non-alloy structural steel

Chemical Composition (max. values, %)

(according to EN 10025-2 for S355J2C)

• C (Carbon): <= 0.20 %

• Mn (Manganese): <= 1.60 %

• Si (Silicon): <= 0.55 %

• P (Phosphorus): <= 0.035 %

• S (Sulphur): <= 0.035 %

• N (Nitrogen): <= 0.012 %

• Nb, V, Ti (microalloying elements): <= 0.12 % (total)

Mechanical Properties

(for thickness <= 16 mm; values slightly decrease with increasing thickness)

• Yield strength ReH: min. 355 MPa

• Tensile strength Rm: 470 – 630 MPa

• Elongation A5: min. 20 %

• Impact toughness (Charpy V-notch, J2): min. 27 J at –20 °C

Designation Meaning

• S – Structural steel

• 355 – Minimum yield strength in MPa (<= 16 mm)

• J2 – Impact toughness 27 J at –20 °C

• C – Improved machinability variant (controlled composition for better cutting/welding)

• ČSN/STN 11 523 – National designation (Czech/Slovak standard)

• 1.0579 – European numeric designation

Applications

• Load-bearing structures and profiles

• Bridge components

• Machinery and equipment requiring higher strength and toughness

• Pressure vessels with moderate requirements

• Plates, bars, tubes for construction and mechanical engineering