Stainless steel grade 430 is a non-hardenable steel containing straight chromium, and belongs to the ferritic group of steels. This steel is known for its good corrosion resistance and formability, coupled with practical mechanical properties. It can be used in certain chemical applications due to its resistance to nitric acid. 430 is a low-carbon plain chromium ferritic stainless steel. The steel has good corrosion resistance in mildly corrosive environments and good resistance to oxidation at elevated temperatures. In the annealed condition the steel is ductile, does not harden excessively during cold work and can be formed using a large variety of roll forming or mild stretch-bending operations, as well as the more common drawing and bending processes. The steel has limited weldability and should not be used in the as welded condition for dynamic or impact loaded structures. Being a ferritic material, 430 is liable to brittle fracture at sub-zero temperatures, and cannot be used in cryogenic applications. As the steel does not contain nickel or molybdenum, it is cheaper than any of the 300 series steels

Available forms:  Coils, Sheets, Strips, Welded Tubes, Profiles

Chemical Analysis

Chemical Compositions

Element % Present (in product form)
C, H, P L
Carbon (C) ≤0.08 ≤0.08
Silicon (Si) ≤1.00 ≤1.00
Manganese (Mn) ≤1.00 ≤1.00
Phosphorous (P) ≤0.040 ≤0.040
Sulfur (S) ≤0.015 ≤0.0301)
Chromium (Cr) 16.00 – 18.00 16.00 – 18.00
Iron (Fe) Balance Balance

Mechanical properties (at room temperature in annealed condition)

Product Form Thickness t or diameter4) d mm max Yield Strength Rp0.2 Tensile Strength Elongation min. in %
N/mm2
(longitudinal)
N/mm2
(transverse)
Rm N/mm2 A80mm1) ˂3mm thickness (longitudinal and transverse)
C 8 260 280 450 – 600 20
H 13.5 240 260 450 – 600 18
P 252) 240 260 430 – 630 20
L3) 100 240 400 – 630 20 (longitudinal)

Usage Areas

  • Automotive trim
  • architectural applications
  • industrial roofing
  • wall cladding,
  • kitchen utensils
  • sinks
  • washing machine