ASTM A182 F51, F53 Duplex Steel Tubesheet

Are you looking for high-performance duplex steel tubesheets for corrosion-resistant and high-strength applications?Our ASTM A182 F51 and F53 duplex stainless steel tubesheets are engineered for maximum corrosion resistance, excellent mechanical properties, and long-term durability. Perfect for heat exchangers, chemical reactors, and pressure vessels, they meet the most demanding industrial requirements.

 

What Are ASTM A182 F51 and F53 Duplex Steel Tubesheets?

ASTM A182 F51 (UNS S31803/S32205) and F53 (UNS S32750) are high-strength, corrosion-resistant forged duplex and super duplex stainless steel grades used for tubesheets in heat exchangers and pressure vessels. They combine austenitic and ferritic microstructures to offer superior strength and pitting resistance against chloride, ideal for harsh oil, gas, and marine environments.

 

 

What is the difference between F51 and F53 duplex steel?

F51 and F53 are both duplex stainless steels, but F53 is a higher-alloyed "super duplex" grade designed for superior corrosion resistance and strength. F53 (25% Cr) offers much better pitting resistance (higher PREN) and yield strength compared to standard duplex F51 (22% Cr), making F53 ideal for harsh, high-chloride marine environments.

 

ASTM A182 Duplex Steel Tubesheet specification

Product Name	ASTM A182 Duplex Steel Tubesheet
Available Grades	F51 (UNS S31803 / S32205), F53 (UNS S32750), F55 (UNS S32760), F60 (UNS S32205)
Standard	ASTM A182 / ASME SA182
Type	Forged Tubesheet / Heat Exchanger Plate
Condition	Solution Annealed, Pickled, Machined, or Polished
Thickness	20 mm – 200 mm (customizable)
Diameter	200 mm – 2500 mm (customized per drawing)
Certification	EN 10204 3.1 / 3.2, NACE MR0175, PED 97/23/EC
Surface Finish	Pickled, Bright Machined, Polished
Stock Status	F51 / F53 / F60 / F55 available in stock

 

ASTM A182 F51 and F53 Duplex Steel Chemical composition and physical properties 

Property	ASTM A182 F51	ASTM A182 F53
UNS Number	S31803	S32750
Chromium (Cr)	21 – 23%	24 – 26%
Nickel (Ni)	4.5 – 6.5%	6.5 – 8.0%
Molybdenum (Mo)	2.5 – 3.5%	3.0 – 5.0%
Nitrogen (N)	0.14 – 0.20%	0.24 – 0.32%
Yield Strength (MPa)	≥ 450	≥ 550
Tensile Strength (MPa)	620 – 830	750 – 950
Elongation (%)	≥ 25	≥ 25
Hardness (HB)	≤ 280	≤ 300

 

ASTM A182 F51 And F53 Duplex Steel Applications 

Oil & Gas: Piping, manifolds, riser components, and valves exposed to high-stress, corrosive, and H2S environments.
Chemical Processing: Pressure vessels, tanks, heat exchangers, and piping systems handling chloride-bearing solutions.
Marine Applications: Propeller shafts, rudders, and marine hardware.
Pollution Control: Flue gas desulfurization (FGD) systems.
Pulp & Paper: Bleaching equipment, liquor tanks, and digesters.

 

Duplex stainless steel tubesheet supplier

Large Stock Available:F51, F53, F60, and F55 duplex tubesheets in ready stock with fast shipping.
Custom Machining Service:CNC-drilled tube holes, groove cutting, and surface polishing as per drawing.
Full Certification Support:Includes MTC, ultrasonic test reports, and third-party inspection (SGS, BV, TUV).
Global Export Experience:Supplying duplex steel products to over 60 countries, including Europe, the Middle East, and Southeast Asia.

 

FAQ

Q: Can these tubesheets be welded?
Yes, duplex steel can be welded, but preheat and controlled welding procedures are recommended to preserve duplex properties.
Q: Are F51 and F53 suitable for seawater applications?
Yes. Both grades perform well in seawater, but F53 is preferred for highly aggressive marine conditions.
Q: What standards do your tubesheets meet?
Our tubesheets comply with ASTM A182, ASME SA182, EN 10088, and ISO 9001 quality systems.
Q: Can you produce custom sizes?
Yes. We offer custom diameters, thicknesses, and machining to meet project-specific needs.