430 Stainless Steel


Type 430 Stainless Steel is a low carbon ferritic stainless steel which, in mildly corrosive environments or atmospheric exposures, has corrosion resistance approaching that of some nickel-bearing stainless steels. This alloy is oxidation resistant at elevated temperatures. Type 430 is ductile, does not work harden readily, and can be formed using a variety of roll forming or mild stretch bending operations as well as the more common drawing and bending processes. Type 430 is ferromagnetic.

Product Forms:

Sheet, Strip



Typical Applications:

Sinks, sink rims, appliance trim, counter tops, dish washers, range hoods, flatware, architectural uses, roofing, siding and restaurant equipment.

Chemical Composition:

ElementType 430
Carbon 0.12 max.
Manganese 1.00 max.
Sulfur 0.030 max.
Phosphorus 0.040 max.
Silicon 1.00 max.
Chromium 16.0 – 18.0
Nickel 0.75 max.

Mechanical Properties:

TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2" Gauge length)Hardness Rockwell
430 Ann 30 min. 65 min. 22 min HRB 89

Physical Properties:

Density (lb./ in^2) @ RT   0.278
Modulus of Elasticity in Tension (psi x 10^6)   29.0
Specific Heat (BTU/o F/lb.) 32 to 212 oF 0.11
Thermal Conductivity (BTU/hr/ft^2/ft) 212oF 13.8
  932oF 15.0
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) 32 to 212oF 5.7
  32 to 932oF 6.2
Electrical Resistivity (micro ohms - cm) at 70oF 60.0
Melting Point Range (oF)   2600 - 2750
Oxidation Resistance - Continuous Service(oF)   1500


Type 430 should be annealed at 1450-1550ºF and furnace cooled at a rate of 50°F per hour to 1100°F and air cooled. If the annealing temperature does not exceed 1450°F (790°C), an air cool may be substituted for the furnace cool when annealing thin sections.


Type 430 is readily drawn and formed. Its drawing characteristics are similar to those of low-carbon steel, although it is stronger in the annealed condition and will require stronger tooling and increased power.


Type 430 is generally considered to be weldable by the common fusion and resistance techniques. Special consideration is required to avoid brittle weld fractures during fabrication. When a weld filler is needed, AWS E/ER 308L and 430 are most often specified. Corrosion: This alloy is resistant to attack in a wide variety of corrosive media including nitric acid, and many organic acids.