Duplex stainless steel 2507(S31750) price

Posted:2015-11-30 23:53:03

2507 stainless steel

katalor Stainless inventory now includes Duplex stainless steel 2507, which is a duplex stainless steel with 4% molybdenum,25% chromium, and 7% nickel. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. Duplex 2507 is designed for applications which require exceptional strength and corrosion resistance; examples include applications in chemical processing, petrochemical, and seawater equipment.

2507(S31750) chemical composition

Element	Content (%)
Chromium, Cr	24 – 26
Nickel, Ni	6 – 8
Molybdenum, Mo	3 – 5
Manganese, Mn	1.20 max
Silicon, Si	0.80 max
Copper, Cu	0.50 max
Nitrogen, N	0.24 – 0.32
Phosphorous, P	0.035 max
Carbon, C	0.030 max
Sulfur, S	0.020 max
Iron, Fe	Balance

2507(S31750) Physical properties

0.2% Proof Stress (N/mm2 ) [ksi] minimum	550[79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum	800 [116]
Elongation (%) minimum	25
Hardness (HBN)	270 max
Reduction of Cross Section Area (%)	45
Charpy V-notch Impact at ambient Temp (J) [ft.lb]	80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb]	45av, 35min [33av, 25.8min]

Density (Kg.m-1)	7810
Magnetic Permeability	33
Young’s Modulus (N/mm2)	199 x 103
Specific Heat, 20°C (J.Kg-1.°K-1)	475
Fracture Toughness, Kq (MPa.m)	475
Specific Electrical Resistance, 20°C (µO.m)	0.80
Thermal conductivity, 20°C (W.m-1.°K-1)	14.2
Mean coefficient of thermal expansion, 20-100°C (°K-1)	11.1 x 10-6

2507(S31750) Application
1-Oil and gas industry equipment
2-Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems
3-Chemical process industries, heat exchangers, vessels, and piping
4-Desalination plants, high pressure RO-plant and seawater piping
5-Mechanical and structural components, high strength, corrosion-resistant parts
6-Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping

2507(S31750) Welding
2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure. Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 300°F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.

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