S31803 Stainless Steel Chemical Composition | ||||||||
C | Mn | Si | P | S | Cr | Ni | Mo | N |
≤0.030 | ≤2.00 | ≤1.00 | ≤0.030 | ≤0.020 | 22.0~23.0 | 4.5~6.5 | 3.0~3.5 | 0.14-0.20 |
The S31803 dual phase stainless steel is a duplex stainless steel made of 21% chromium,2.5% molybdenum and 4.5% nickel-nitrogen alloy.
It has high strength, good impact toughness and good overall and local resistance to stress corrosion. The yield strength of the S31803 duplex stainless steel is twice that of austenitic stainless steel, which allows the designer to reduce the weight in the design of the product, giving the alloy a price advantage over 316,317 L.
This alloy is particularly suited to - + 50 ° F / 600 ° F temperature range. Applications beyond this range can also be considered for this alloy, but there are some limitations, especially when applied to welding structures.
S31803 Stainless Steel Characteristic:
1.S31803 duplex stainless steel and 316 l and 317 l austenitic stainless steel, steel S31803 duplex on pitting corrosion and crevice corrosion resistance is superior, it has the very high corrosion resistance, compared with austenitic, its lower thermal expansion coefficient, high thermal conductivity.
2. Compared with austenitic stainless steel, S31803 dual-phase stainless steel has twice the compressive strength, compared with 316L and 317L, the designer can reduce its weight. Especially suitable for 2205 alloy + 50 ° F / 600 ° F temperature range, in the case of restricted (especially for welding structure), can also be used to lower the temperature.
S31803 Stainless Steel Application:
pressure vessel, high pressure storage tank, high pressure pipe, heat exchanger (chemical processing industry).
oil and gas pipeline, heat exchanger pipe fittings.
sewage treatment system.
pulp and paper industry classifier, bleaching equipment, storage and processing system.
rotary shaft, press roller, blade and impeller in high strength and corrosion resistance environment.
cargo containers for ships or trucks.
food processing equipment.
Spot delivery, including delivering small batches of goods
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Cutting plates, including complex shapes of materials and special processing and disposal
Cutting bars and strips
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