430 Stainless Specifications | |
Institute | Standards |
AMS | 5627 |
ASTM | A182, A240, A276, A314, A473, A479, A493, A580 |
QQ-S | QQ-S-763 |
SA | 240, 479 |
430 stainless steel is a ferritic, straight chromium alloy valued for its good corrosion and oxidation resistance. With about 16–18% chromium, it offers durability in mildly corrosive environments. Commonly used in appliances, automotive trim, and architectural applications, 430 provides an economical alternative to austenitic grades without sacrificing essential performance.
430 Stainless Specifications | |
Institute | Standards |
AMS | 5627 |
ASTM | A182, A240, A276, A314, A473, A479, A493, A580 |
QQ-S | QQ-S-763 |
SA | 240, 479 |
430 Stainless Steel Chemical Composition | ||
Element | Percentage | Description |
Chromium (Cr) | 16.0 to 18.0% | Maximum |
Manganese (Mn) | 1.0% | Maximum |
Silicon (Si) | 1.0% | Maximum |
Carbon (C) | 0.12% | Maximum |
Phosphorus (P) | 0.04% | Maximum |
Sulfur (S) | 0.03% | Maximum |
Iron (Fe) | 80.81% | Balance |
430 Stainless Physical Properties | |
Specific Gravity | 7.70 |
Density | 0.2780 lb / in³ |
Mean Specific Heat (32 to 212 ℉) | 0.1100 Btu / lb ∙ ℉ |
Mean CTE (32 to 1,200 ℉) | 6.60 x 10 in |
Thermal Conductivity (212 ℉) | 181.0 BTU-in / hr / ft² ∙ ℉) |
Modulus of Elasticity (E) | 29.0 x 10³ ksi |
Electrical Resistivity (70 ℉) | 361.0 ohm-cir-mil / ft |
430 Stainless Steel Mechnical Properties | |
Ultimate Tensile Strength | 75 ksi / 517 MPa |
0.2% Yield Strength | 45 ksi / 310 MPa |
% Elongation in 2" (50.8mm) | 30 |
% Reduction of Area | 65 |
Brinell Hardness | 155 |
430 stainless steel is a ferritic, straight-chromium stainless steel that contains about 16–18% chromium and very little nickel. It is known for:
Good corrosion resistance in mildly corrosive environments.
Excellent oxidation resistance at elevated temperatures (up to ~815 °C / 1500 °F).
Magnetic properties, unlike austenitic grades (304, 316).
Lower cost compared to nickel-containing stainless steels.
It is commonly used in automotive trim, kitchen appliances, architectural applications, flue liners, and decorative panels, where good appearance and moderate corrosion resistance are important.
430 Stainless Comparison | ||||
Grade | Strength | Corrosion Resistance | Chloride Resistance | Oxidation Resistance |
430 | Low | Moderate | Poor | Good |
304 | Moderate | Good | Fair | Excellent |
316 | Moderate | Very Good | Good | Excellent |
2205 | High | Excellent | Excellent | Moderate |
