AISI 430 Stainless Steel Chemical Composition

AISI 430 Stainless Steel Chemical Composition

AISI 430 (also known as Type 430 or UNS S43000) is a straight-chromium ferritic stainless steel. The chemical composition is tightly controlled to ensure good corrosion resistance, formability, and oxidation resistance up to approximately 815 °C.

The standard chemical composition according to ASTM A240 / AISI 430 is as follows:

Key Notes on Composition

• Chromium (16–18%)is the primary alloying element that forms the protective passive oxide layer, giving AISI 430 its corrosion resistance in mild atmospheres and fresh water.
• Low Nickel(≤ 0.75%) and no molybdenum keep the material cost-effective and price-stable compared to austenitic grades like 304.
• Controlled Carbon(≤ 0.12%) minimizes carbide formation and improves weldability, although post-weld annealing is still recommended for best corrosion performance.
• Manganese and Siliconare kept low to maintain good formability and avoid embrittlement.

This composition is identical across all major equivalent standards, including JIS G4305 SUS430, EN 1.4016 / X6Cr17, GB/T 3280 10Cr17, and DIN 1.4016.

For full product details on this grade, including available finishes and sizes, please see our:

• a240 Type_430 stainless steel sheet
• EN10088 2 X6Cr17 stainless steel sheet
• DIN 1.4016 stainless steel sheet
• GB/T 10Cr17 1Cr17 stainless steel sheet
• JIS G4305 SUS 430 stainless steel sheet

Gangsteel supplies AISI 430 material meeting the exact ASTM A240 chemical requirements with full mill test certificates. If you need the latest price, mechanical properties, or custom sizes, feel free to contact us.