Wuxi Sylaith Special Steel Co., Ltd.
Wuxi Sylaith Special Steel Co., Ltd.
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2205 2507 Hairline Super Duplex Stainless Steel Sheet For Pressure Pipes
Production Description
Duplex Stainless Steel (DSS ) refers to stainless steel with about 50% of ferrite and 50% of austenite, and generally less than 30% of the content of the less phase. In the case of low C content, the Cr content is 18%~28%, and the Ni content is 3%~10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N.
This type of steel has higher plasticity and toughness, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance, while maintaining iron The 475 ℃ brittleness and high thermal conductivity of element stainless steel have the characteristics of superplasticity. It has high strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion.
Specification
| Thickness | Cold rolled: 0.3 - 3mm Hot rolled: 3 - 60mm or as required |
| Length | 1000-6000mm or as required |
| Width | 1000mm, 1219mm, 1500m, 1800mm, 2000mm or as required |
| Standard | ASTM, AISI, JIS, GB, DIN, EN |
|
Packing | Standard export sea-worthy packing or as customers required: 1. bundle package 2. wooden case, wooden pallet package 3. special according to customer's request |
| Surface | BA, 2B, NO.1, NO.4, 4K, HL, 8K, etc |
| Technique | Cold Rolled, Hot Rolled |
| Loading Port | Tianjin, Qingdao, Shanghai, etc |
| Grade (ASTM UNS) | 201, 202, 301, 302, 302HQ, 303, 304, 304L, 304F, 309,3 10, 310S, 314, 314L, 316, 316L, 316Ti, 316F, 317, 317L, 321, 409L, 410, 410S, 416, 420, 420J1, 420JS, 430, 430F, 431, 904, 2507, 2205, etc |
| Application | Luxury door, elevator, outdoor building, advertising nameplate, furniture, kitchen ceiling, aisle board, screen,tunnel engineering, outer wall of hotel lobby, etc |
Product Details
Welding Features
After normal solution treatment of duplex stainless steel (heating at 1020 ℃ ~ 1100 ℃ and water cooling), the steel contains about 50% to 60% austenite and 50% to 40% ferrite. As the heating temperature increases, the ratio of the two phases does not change significantly.
Duplex stainless steel has good low temperature impact toughness. For example, the impact absorption energy of a 20mm thick plate transverse sample can reach more than 100J at -80℃. In most media, its uniform corrosion resistance and pitting corrosion resistance are good, but it should be noted that when this type of steel is heat treated below 950 ℃, its stress corrosion resistance will be significantly deteriorated due to the precipitation of σ phase. Since the ratio of Cr equivalent to Ni equivalent of the steel is appropriate, a large amount of primary austenite is still retained after high temperature heating, and secondary austenite can be formed during the cooling process.