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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


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


2507(S31750) Physical properties

0.2% Proof Stress (N/mm2 ) [ksi] minimum


Ultimate Tensile Strength (N/mm2) [ksi] minimum

800 [116]

Elongation (%) minimum


Hardness (HBN)

270 max

Reduction of Cross Section Area (%)


Charpy V-notch Impact at ambient Temp (J) []

80min [59min]

Charpy V-notch Impact at -46°C (J) []

45av, 35min [33av, 25.8min]

Density (Kg.m-1)


Magnetic Permeability


Young’s Modulus (N/mm2)

199 x 103

Specific Heat, 20°C (J.Kg-1.°K-1)


Fracture Toughness, Kq (MPa.m)


Specific Electrical Resistance, 20°C (µO.m)


Thermal conductivity, 20°C (W.m-1.°K-1)


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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