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High-quality 430 Cold Rolled Stainless Steel For Automobile

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DESCRIPTION	430 is one of the most widely used of the “non-hardenable” ferritic stainless steels. With nominal 16% chromium it combines good corrosion resistance and heat and oxidation resistance up to 1500 °F (816 °C) with good mechanical properties. Type 430 is a non-stabilized stainless steel and as such is not suitable for all welded applications.

CHEMICAL COMPOSITION	C	Si	Mn	P	S	Cr	Ni	列1	列2
	≤0.12	≤1.00	≤1.00	≤0.040	≤0.030	16.0-18.0	≤0.75

APPLICATIONS	automotive trim and molding/ furnace combustion chambers/ dishwashers/ range hoods/ gas burners on heating units/ gutters and downspouts and flatware

MECHANICAL PROPERTIES AFTER COLD ROLLING AND FINAL ANNEALING	UST	483
	YS	310
	Elongation	<28%
	Rockwell Hardness	< 78 B

PHYSICAL PROPERTIES	Density, lbs./in.3 (g/cm3)	0.28 (7.74)				N/A
	Electrical Resistivity, µΩ•in. (µΩ•cm) 70 °F (21°C)	23.68(60)				N/A
	Thermal Conductivity, BTU/hr./ft./°F W/(m•K) 212 °F (100 °C) 932 °F (500 °C)	15.1(26.1) 15.2(26.3)				N/A
	Coefficient of Thermal Expansion, in./in./°F (µm/m/K) 32 – 212 °F (0 – 100 °C) 32 – 1000 °F (0 – 538 °C)	5.8 x 10-6 (10.4) 6.3 x 10-6 (11.4)				N/A
	Modulus of Elasticity, (MPa)	200x 103				N/A
	Specific Heat, BTU/lbs./°F (kJ/kg/K) 32 – 212 °F (0 – 100 °C)	0.11 (0.46)				N/A

CORROSION RESISTANCE	430 has excellent corrosion resistance, including high resistance to nitric acid as well as to sulfur gases and many organic and food acids. This alloy does not provide the resistance to pitting by dilute reducing acids that is provided by the chromium-nickel stainless steels. Because of its relatively high chromium content, the material provides good resistance to oxidation. Its maximum scaling temperature is 1500 °F (816 °C) for continuous service.

FORMABILITY	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. It is also adaptable to most hot-forming operations.

WELDABILITY	This ferritic class of stainless steels is generally considered to be weldable by common fusion and resistance techniques. Special consideration is required to avoid brittle weld fractures during fabrication by minimizing discontinuities, controlling weld heat input, and occasionally warming the part somewhat before forming. This particular alloy is generally considered to have slightly poorer weldability than the most common alloy of the stainless class, Type 409, but better than standard non-stabilized Type 410 with higher carbon. A major difference is the addition of aluminum to control hardening, which results in the need for higher heat input to achieve penetration during arc welding. When a weld filler is needed, American Welding Society (AWS) Classification ER/EC430, E430TX-X, ER/EC309L, or E309LT0-3 wires may be used.

HEAT TREATMENT	Anneal: Heat to 1400 – 1525 °F (760 – 829 °C), air cool or water quench.