44660 Stainless Steel Welded Pipe

Product Description

Classified as a super duplex alloy, 44660 contains a balanced mix of chromium, molybdenum, nickel, nitrogen, and copper, making it ideal for challenging chemical processing, oil and gas, desalination, and marine applications.

Our 44660 welded pipes are manufactured using advanced TIG/ERW techniques with stringent quality control to ensure excellent weld integrity, uniformity, and long-term performance in corrosive and high-pressure conditions.

Product Parameters

Standard	ASTM A790 / A928 (for duplex SS welded pipe)
Material Grade	UNS S44660 / 25Cr-3Mo-4Ni-Cu-N
Pipe Type	Welded Pipe (ERW, TIG, Laser-welded)
Available Sizes	OD: 1/2" – 48" (12.7mm – 1219mm)
Wall Thickness	SCH 5S – SCH XXS or customized
Length	6m standard, custom lengths on request
Surface Finish	Pickled, polished, or customer-specific
End Type	Plain End, Beveled End, Threaded End

Scope of Application

• Desalination plants (brine circulation, seawater piping)
• Oil & gas offshore platforms (firewater systems, risers, piping systems)
• Chemical processing and refineries (chloride-rich or oxidizing acids)
• Pulp and paper industry (bleaching equipment, digesters)
• Heat exchangers, condensers, pressure vessels
• Pollution control and FGD systems

Mechanical Properties

Property	Value
Tensile Strength	≥ 700 MPa
Yield Strength (0.2%)	≥ 450 MPa
Elongation	≥ 25%
Hardness	≤ 290 HBW
Impact Strength (Charpy V-notch, RT)	> 100 J

Physical Performance

Property	Value
Density	~7.80 g/cm³
Thermal Conductivity	~15 W/m·K at 20°C
Specific Heat Capacity	~500 J/kg·K
Modulus of Elasticity	~200 GPa
Thermal Expansion	~13 x10⁻⁶ /°C (20–100°C)
Magnetic Permeability	Ferromagnetic
Corrosion Resistance	Excellent in chloride and acidic media

FAQ

Why Choose SUNNING STEEL?

• Certified to ASTM and ISO Standards
• High-performance duplex alloy with excellent corrosion resistance
• Custom dimensions and fast delivery
• Backed by technical support and quality assurance