Austenitic Stainless Steel is the most sought Steel & widely used by all manufacturers, which include SS 304 & SS 316 GRADES. These Grades have High Corrosion Resistance properties due to high Chromium content combined with Nickel.

Grade EN Specification Carbon (C) Silicon (S) Manganese (Mn) Phosphorus (P) Sulfur (S) Chromium (Cr) Molybdenum (Mo) Nickel (Ni) Nitrogen (N) Iron (Fe)
301 1.431 0.05 – 0.15 2 2 0.045 0.015 16.0 – 19.0 0.8 6.0 – 9.5 0.1 Balance
304 1.4301 0.07 1 2 0.045 0.015 17.5 – 19.5 – 8.0 – 10.5 0.1 Balance
304L 1.4307 0.03 1 2 0.045 0.015 17.5 – 19.5 – 8.0 – 10.5 0.1 Balance
201 1.4372 0.15 1 5.5 – 7.5 0.045 0.015 16.0 – 18.0 – 3.5 – 5.5 0.05 – 0.25 Balance
316 1.4401 0.07 1 2 0.045 0.015 16.5 – 18.5 2.0 – 2.5 10.0 – 13.0 0.1 Balance
316L 1.4404 0.03 1 2 0.045 0.015 16.5 – 18.5 2.0 – 2.5 10.0 – 13.0 0.1 Balance

Mechanical Properties

The Mechanical Properties of Stainless Steel vary depending on the chemical composition of each grade.

Grade EN Specification Form Max Thickness (mm) 0.2% – Proof Strength (min MPa)a 1% – Proof Strength (min MPa)a Tensile Strength (MPa)
304 1.4301 Cold rolled strip 6 230 260 540 – 750
304 1.4301 Hot rolled strip 13.5 210 250 520 – 720
304 1.4301 Hot rolled plate 75 210 250 520 – 720
304L 1.4307 Cold rolled strip 6 220 250 520 – 700
304L 1.4307 Hot rolled strip 13.5 200 240 520 – 700
304L 1.4307 Hot rolled plate 75 200 240 500 – 700
316 1.4401 Cold rolled strip 6 240 270 530 – 680
316 1.4401 Hot rolled strip 13.5 220 260 530 – 680
316 1.4401 Hot rolled plate 75 220 260 520 – 670
316L 1.4404 Cold rolled strip 6 240 270 530 – 680
316L 1.4404 Hot rolled strip 13.5 220 260 530 – 680
316L 1.4404 Hot rolled plate 75 220 260 520 – 670

If, in the case of strip in rolling widths < 300 mm, longitudinal test pieces are taken, the minimum values are reduced as follows:

  • Proof strength – minus 15 MPa.
  • Elongation for constant gauge length – minus 5 %.
  • Elongation for proportional gauge length – minus 2 %.