439 Stainless Steel Plate
439 stainless steel is based on the general ferrite material (430) on the basis of reducing the C content, while adding Ti and other stabilizing elements, so that the steel's resistance to intergranular corrosion, formability and weldability have improved. Compared with the 304 steel, the elongation is low (about 30%), but the strength, corrosion resistance and corrosion resistance is better than 200 series materials.
Oxidation resistance and corrosion resistance superior to Type 409 make Steel 439 attractive for numerous automotive exhaust applications. Suggested applications include tubular manifolds and other exhaust system areas where temperatures may exceed the oxidation limit of Type 409 or where aqueous corrosion resistance, particularly to chlorides, is needed. Steel 439 is a ferritic stainless steel that outperforms Type 409 in both oxidation resistance and corrosion resistance. Special adjustment to chemical composition combined with special processing give this alloy excel- lent formability that is reproducible, coil after coil and heat after heat. This provides special advantages when producing difficult-to-form exhaust system components.
Chemical Composition:
Standard | Grade | C | Si | Mn | P | S | Cr | Ni | N | Ti |
---|---|---|---|---|---|---|---|---|---|---|
ASTM | 439 | 0.03 | 1.00 | 1.00 | 0.04 | 0.03 | 17.0- 19.0 | ≤ 0.5 | ≤ 0.04 | 0.2+4(C+N)-1.10 |
DIN | 1.4510 | 0.05 | 1.00 | 0.00 | 0.04 | 0.015 | 16.0-18.0 | - | - | 4(C+N)-0.80 |
Mechanical Properties:
Tensile Strength | Yield Strength | Elongation | Hardness | |
---|---|---|---|---|
Grade | N/m㎡ | (≤)N/m㎡ | (≥)% | (≤)HV |
ASTM 439 | ≥415 | 205 | 22 | 180 |
DIN 1.4510 | 420-600 | 230 | 23 |
Application:
Decorative panels for elevators and escalators
Building decorative panels, such as decorative structural parts, structural pipes
Automotive exhaust system components
Washing machine inner tube