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UNS S43035 Type 439 is a titanium stabilized, 18 percent chromium alloy that is a ferritic stainless steel designed to resist corrosion in a variety of oxidizing environments from fresh water to boiling acids. Type 439 may also be used in many oxidizing environments where Type 304 is considered adequate in terms of general corrosion resistance but is subject to chloride stress corrosion cracking. This variation does not require annealing after welding to restore ductility or to provide intergranular corrosion resistance. Excellent resistance to stress corrosion cracking, good weldability, high thermal conductivity and low thermal expansion characteristics make Type 439 stainless steel an ideal consideration for many applications.
Appliances
Hot water tanks, Residential Furnances
Automotive
Difficult-to-form exhaust-system components, Tubular manifolds, Mufflers
Power generation
Heat exchanger tubing
| Grade | Fe | Cr | Si | Ti | Mn | Ni | Mo | Nb/Cb | P | N | C | S |
| SS 439 | 81.3535 | 17.35 | 0.35 | 0.335 | 0.25 | 0.200 | 0.1 | 0.02 | 0.02 | 0.0100 | 0.01 | 0.0015 |
| Tensile strength (annealed) | 438 MPa | 63500 psi |
| Yield strength (annealed/ @strain 0.200 %) | 263 MPa | 38100 psi |
| Modulus of elasticity | GPa | ksi |
| Poisson’s ratio | 0.270 – 0.290 | 0.270 – 0.290 |
| Elongation at break (In 2″, 50% cold worked) | 2.80% | 2.80% |
| Hardness, Rockwell B (annealed) | 72.9 | 72.9 |
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Behind the growth and success of Kuaima Steel is years of hard work and dedication in the steel industry and meeting customers' needs on time. Advanced technology, standard products, certified quality standards and the bestcustomer service make Kuiama Steel a true leader in the global market.
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Every industry has its unique set of material specifications and needs. That’s why you can count on the exceptional experience and industry knowledge of the professionals at Kuaima Steel - Meeting the Exact Needs of Every Industry That Uses steel.
Liaocheng Economic and Technological Development Zone, Shandong Province, China
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