stainless steel pipe welding standards,
stainless steel welded tube
|Products||OD||Wall||Lengths and/or coils||Grades||OD||Wall||Lengths|
|Pressure &Corrosion Tubing
Meets or exceeds requirements forwelded
|1/16" (1.59 mm) to 4" (101.6 mm)
Metric sizes available
|0.010" (0.25 mm) to 0.220" (5.59 mm)||Random or cut lengths up to 40' (12.2 m)
Coils to 1-1/2" OD
|Super Duplex 2507||
<1-1/2" (38.1 mm) ±0.005" (0.13 mm)
1-1/2" (38.1 mm) to 3" (76.2 mm) ±0.010" (0.25 mm)
3-1/2" (88.9 mm) to 4" (101.6 mm) ±0.015" (0.38 mm)
|±10%||Randoms up to +2" (50.8 mm)
Cuts +1/8" (3 mm) -0"
Coils to 80,000' (24,384 m)
|Subsea Umbilical Tubing
Specifications: ASTM-A789 and ASTM-A790
|3/8" (9.53 mm) to 1-1/2" (38.1 mm)||0.039" (0.99 mm) to 0.125" (3.18 mm)||Cut lengths to 60' (18.3 m)
Coils to 1-1/2" OD*
|Super Duplex 2507||±0.005" (0.127 mm)||±10%||Coils to 80,000' (24,384 m)|
|Tensile Strength||Yield Strength|
|Alloy||UNS||Spec.||psi||MPa||ksi||psi||MPa||ksi||Elongation in 2 in. (min.) %||Grain Size Req.||Max. Hardness||Modulus of Elasticity (x106 psi)||Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)||Thermal Conductivity (BTU-in/ ft2-h-°F)|
|Super Duplex 2507||S32750||A789, A790||116,000||800||116||80,000||550||80||15||—||32 Rc||27.5||7.2||98|
|Grade||Super Duplex 2507|
|Carbon (C) Max.||0.030|
|Manganese (Mn) Max.||1.20|
|Phosphorous (P) Max.||0.035|
|Sulphur (S) Max.||0.020|
|Silicon (Si) Max.||0.80|
|Alloy||UNS Designation||Werkstoff NR.||Specifications*|
|Super Duplex 2507||S32750||1.4410||A/SA789, A/SA790
ASTM/ASME A240 -UNS S32750
EURONORM: 1.4410-X2 CrNi MoN 25.7.4
Super Duplex Stainless Steel is a highly alloyed, good performance duplex steel with a pitting resistance. Super duplex offers good resistance to pitting and crevice corrosion.Super duplex is suited for use in aggressive environments. It has good resistance to stress corrosion cracking in chloride and sour environments and has good resistance to erosion corrosion and corrosion fatigue.
Oil and gas industry equipment.
Offshore platforms, heat exchangers,process and service water systems, fire-fighting systems, injection and ballast water system.
Chemical process industries, heat exchangers, vessels, and piping.
Desalination plants, high pressure RO-plant and seawater piping.
Mechanical and structural components, high strength, corrosion-resistant parts.
power industry FGD systems, utility and idustrial scrubber systems, absorber towers, ducting, and piping.
|Pren=(Cr%)+3.3(Mo%)+16(N%) not less than 40|
|Ultimate Tensile Strength, Ksi||116min|
|0.2%Offset Yield Strength 0.2%,Ksi||80min|
|0.1%Offset Yield Strength 0.2%,Ksi||91min|
|Elongation in 2 inches, %||15 min|
|Hardness Rockwell C||32 max|
|Impact Energy, ft.-lbs.||74min|
Low Temperature Impact Properties:
Elevated temperature Tensile Properties:
|0.2%Offset Yield Strength,Ksi||80||65||61||58||55|
|Ultimate Tensile Strength, Ksi||116||101||98||95||94|
2507 should be hot worked between 18750F and 22500F. This should be followed by a solution anneal at 19250F minimum and a rapid air or water quench.
Most of the common stainless steel forming methods can be used for cold working 2507. The alloy has a higher yield strength and lower ductility than the austentic steels so fabricators may find that higher forming forces, increased radius of bending and increased allowance for springback are necessary. Deep Drawing, stretch forming and similar processes are more difficult to perform on 2507 than on an austenitic stainless steel. When forming requires more than 10% cold deformation, a solution anneal and quench are recommended.
2507 should be solution annealed and quenched after hot or cold forming solution annealing should be done at a minimum of 19250F. (1025-1125 centigrade) Annealing should be followed immediately by a rapid air or water quench to obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.
2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding, gas tungsten arc welding, plasma arc welding, flux cored wire or submerged arc welding. 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.
Contact Person: Gao Ben