What is the material standard 1.4462?

What is 1.4462 stainless steel?

1.4462 stainless steel, commonly known as Duplex 2205 or UNS S32205, is the most widely used duplex stainless steel worldwide. With its balanced ferritic-austenitic microstructure, it offers approximately twice the yield strength of standard austenitic stainless steels like 304 and 316, combined with excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. This exceptional combination of high strength and superior corrosion resistance makes it the material of choice for demanding applications across chemical processing, oil and gas, marine environments, and pulp and paper industries.

 

What is the material standard 1.4462?

1.4462 is defined in EN 10088-2 (composition) and EN 10088-3 (mechanical properties) for bars/sections, and appears in product standards such as:

EN 10028-7 - plates for pressure vessels (PED)

EN 10216-5 - seamless tubes

EN 10217-7 - welded tubes

ASTM A240 - plate/sheet

ASTM A790 - seamless pipe

ASTM A182 - forgings

 

What material is 1.4462 equivalent to?

EN (Europe)	1.4462 / X2CrNiMoN22-5-3
UNS (USA)	S31803 (original) / S32205 (tighter spec)
ASTM	F51 (S31803), F60 (S32205)
AISI	318 LN
BS (UK)	318S13
JIS (Japan)	SUS 329J3L
GB (China)	022Cr22Ni5Mo3N / S22053
Trade name	SAF 2205® (Sandvik)

 

What are the differences between 1.4462 and 316L?

Higher Yield Strength: The yield strength of 1.4462 (≥450 MPa) is roughly double that of 316L, allowing engineers to design components with thinner wall thicknesses.

Pitting & Stress Corrosion Cracking (SCC) Resistance: 1.4462 achieves a Pitting Resistance Equivalent Number (PREN) of 32–35. Its resistance to stress corrosion cracking in warm, chloride-bearing environments is far superior to that of 316L.

Magnetism: Containing approximately 50% ferrite, 1.4462 exhibits distinct magnetic properties, whereas annealed 316L is typically non-magnetic or weakly magnetic.

 

What is the difference between UNS S31803 and UNS S32205?

UNS S32205 is a tighter, higher-alloy restriction of UNS S31803, specifying higher minimum levels of Chromium (e.g., 22.0–23.0%), Molybdenum, and Nitrogen to ensure higher corrosion resistance and structural stability. Materials complying with the S32205 specification are frequently dual-certified as both S31803 and 1.4462.

 

What is the operating temperature range for 1.4462?

Upper Limit: Recommended for continuous service below 300°C. Exposure to temperatures above 300°C can cause the precipitation of embrittling phases (such as 475°C embrittlement or sigma phase), which severely degrades toughness.

Low-Temperature Limits: Retains excellent impact toughness down to -50°C.

 

What key precautions should be taken when welding 1.4462?

Filler Metal Selection: Over-alloyed filler metals (such as 2209 / ER2209) with elevated Nickel content are recommended to ensure the weld metal restores the optimal ~50/50 ferrite-austenite phase balance upon cooling.

Heat Input Control: Maintain heat input strictly within 1.0–2.5 kJ/mm. Cooling too quickly results in excessive ferrite formation and reduced toughness, while cooling too slowly promotes detrimental sigma phase precipitation.

 

What are the primary application areas for 1.4462?

Oil and gas: Oil pipelines, heat exchangers, downhole piping, pressure vessels.
Chemical processing: Reaction vessels containing organic and inorganic acids.
Desalination: High-pressure pumps, seawater piping, desalination equipment.
Pulp and paper: Digesters, bleaching tanks.

 

1.4462 Stainless Steel Price Per kg

The price of 1.4462 (Duplex Stainless Steel 2205 / UNS S31803) typically ranges from $2.50 to $10.50 per kilogram, depending largely on product form, order volume, and market conditions.
Price details by form are as follows:
Plates and sheets: Standard cold-rolled or hot-rolled sheets/plates range from $2.75 to $6.50 per kilogram;
Round bars and rods: Prices range from $1.89 to $15.00 per kilogram, depending on diameter, surface finish, and minimum order quantity (MOQ);
Tubing and piping: Prices range from $4.80 to $10.50 per kilogram; welded pipes are relatively lower in price, whereas specialty pipes or seamless pipes command higher prices.

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GNEE Steel supplies high-quality Duplex 2205 (1.4462) stainless steel in plate, sheet, pipe, tube, bar, and fitting forms. We support your projects with comprehensive processing services including cutting, bending, forming, and welding, and provide full material certification (EN 10204 3.1) to ensure compliance with international standards. If you have any requirements, please feel free to contact us.