Cold Rolled 2D Finishing 430 Stainless Steel Strips Precision SS Strip 0.05 - 0.5mm Thickness

430 Stainless Steel Chemical Composition

430 stainless steel has high chromium but very low nickel content. Chromium content is between 16 and 18%, while nickel content is 0.5% max. Its other constituents are present in trace amounts. There’s a maximum of 1% each of manganese and silicon, 0.12% carbon, and 0.03% and 0.04% respectively for sulfur and phosphorous. As before, the balance is made up of iron, around 80%.

430 Stainless Steel Mechanical Properties

430 Stainless Steel Physical Properties

430 Stainless Steel Equivalent Grades

Corrosion Resistance

All ferritic grades, such as stainless steel grade 430, have excellent stress corrosion cracking resistance. Grade 430 has good corrosion resistance to numerous substances, such as certain organic acids and nitric acid. The corrosion resistance is maximized in well-polished or buffed conditions. Its pitting and crevice corrosion resistance is quite similar to that of grade 304. 430F is a high-sulphur-free machining grade, and therefore the resistance to pitting and crevice corrosion is comparatively lesser than those grades that are non-free machining.

Welding

To perform any welding, stainless steel grade 430 has to be pre-heated at 150-200°C (302-392°F). In the case of embrittlement in the welded metal, the particular area can be post-weld annealed at 790-815°C (1454-1499°F); however, grain refinement will not happen.

It is recommended that grade 430, 308L, 309 or 310 filler rod should be used based on the application.

The ductility of the welded products can be improved by annealing post-welding at temperatures of 760 to 815°C. However, this is not required for thin welded products. Welding of exhaust tubing of automobiles is carried out without filler rods.

Heat Treatment

Solution annealing can be performed by heating stainless steel grade 430 to 815 – 845°C (1499-1553°F). Then it has to be slow furnace cooled to 600°C (1112°F) and followed by air-cooling quickly – as slow cooling between 540 and 400°C (1004 and 752°F) tends to cause embrittlement.

For sub-critical annealing, heating should be performed to 760-815°C (1400-1499°F), followed by air-cooling or water quenching.

This stainless steel cannot be hardened by thermal treatment.

430 Stainless Steel Applications

This grade of stainless steel can be supplied in all the usual forms: sheet, strip, plate, bar and tube. Its low cost combined with good corrosion resistance lends itself well to the making of domestic appliances. A lot of 430 stainless is used in cookers, washing machines, and dishwashers. Stove element supports are often produced in 430 stainless steel. It can also be found in shallow draw/limited-depth Stainless Steel sinks.

The motor industry uses a lot of 430 stainless steel in its automotive trim and muffler systems. You will also find it used for flue linings, industrial roofing, wall cladding, hinges, and fasteners.