S31803 Duplex Stainless Steel

Grades Duplex 1.4462 - UNS S31803 - F51 Sheet/ Plate
Thickness 3 mm - 100 mm
Width 1000 / 1250 / 1500 / 2000 / 2500 mm
Length 2000 / 2500 / 3000 / 6000 / 6000 tot max. 8000 mm

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Product Introduction

S31803 duplex stainless steel is a medium-alloyed duplex stainless steel composed of austenite and ferrite, each phase comprising approximately 50/50. This unique microstructure combines the advantages of both austenitic and ferritic stainless steels, offering high strength, excellent corrosion resistance, and excellent weldability. HT PIPE is a astm a240 uns s31803 plate supplier with 15+ export experience. Contact us for more information and quotes for free!

duplex s31803 High Strength

Yield strength reaches 400-550 MPa, more than double that of common austenitic stainless steels like 304 stainless steel, allowing designers to reduce weight when designing products.

aisi 2205 Corrosion Resistance

S31803 duplex stainless steel exhibits excellent pitting and stress corrosion resistance, extending its service life 3-5 times that of 316 stainless steel in chloride-containing environments. Its pitting resistance equivalent value (PREN) ranges from 32 to 33, surpassing 316 stainless steel in corrosion resistance.

duplex uns s31803 Weldability

Excellent weldability, with welded joint strength retention exceeding 90% of the parent metal. S31803 duplex stainless steel's low coefficient of thermal expansion reduces residual stress after welding.

astm a240 uns s32750 Heat resistance

Suitable for use in the temperature range of -50°F/+600°F (approximately -45°C/+315°C). Applications outside this temperature range are also contemplated, but with some limitations, particularly when applied to welded structures.

Duplex Steel 2205 Plate Specification

Specification	ASTM A240 / ASME SA240 / NACE MR-0175
Sizes in Stock	1000 x 2000 mm, 1220 x 2440 mm, 1500 x 3000 mm, 2000 x 2000 mm, 2000 x 4000 mm Cold rolled Duplex 2205 Plate 0.5-6.4 mm Hot rolled Duplex 2205 Plate 3.0–10.0 mm
Thickness	0.1 to 100 mm Thk
Width	10-2500mm
Length	2m, 2.44m, 3m, or as required
Finish	2B, 2D, BA NO(8), Cold rolled sheet (CR), Hot rolled plate (HR), SATIN (Met with Plastic Coated), No.1 finish hot rolled ASTM A240 Type 2205 Plate, 1D, 2B, No.4, BA, 8K, satin, hairline, brush, mirror etc.

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Application of 1.4410 material

Chemical and petrochemical: core reactors, towers, heat exchangers, piping systems (especially for handling sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, chlorine-containing organic matter), agitator shafts, valve bodies. Used in key processes such as PTA (purified terephthalic acid), acetic acid, chlor-alkali, etc.

Flue gas desulfurization (FGD): absorption tower shell, spray layer, demister, flue lining, slurry circulation pipeline.

Oil and gas: high sulfur and high chlorine oil and gas extraction (downhole tools, valves), natural gas processing (acid gas scrubbers), oil refining (corrosion-resistant components of atmospheric and vacuum decompression, catalytic cracking and other devices).

Pharmaceutical and fine chemicals: reactors, storage tanks, and piping systems that require extremely high purity and resistance to harsh cleaning agents (such as CIP/SIP systems), strong acid and alkali media.

Pulp and papermaking: scrubbers, storage tanks, and pipelines in the bleaching section (chlorine, chlorine dioxide, and peroxide environments).

Pollution control and waste treatment: incinerator components (flue gas treatment section), wastewater treatment (media containing heavy metals, chelating agents, and strong oxidizing/reducing agents).

Nuclear power: key corrosion-resistant components in nuclear fuel reprocessing and radioactive waste treatment facilities.

Marine engineering: high-pressure and high-temperature components in seawater cooling systems and seawater desalination devices to resist seawater corrosion and biological fouling.

We offers S31803 duplex stainless steel in a variety of forms, including:

Bar
Wire
Sheet
Plate
Forgings
Pipe fittings
Flanges
Seamless & Welded pipe
Seamless Tube & Welded tube
Weld Rod

Thickness of alloy s31803 plate

	Width (w), in. [mm]
Specified Thickness (t), in. [mm]	w ≤ 84 [2134]	84 [2134] < w ≤ 120 [3048]	120 [3048] < w ≤ 144 [3658]	w > 144 [ 3658]
	Tolerance Over Specified Thickness, *** in. [mm]
t < 3/16 [4.76]	0.055 [1.35]	0.070 [1.78]	-	-
3/16 [4.76] ≤ t < 3/8 [9.52]	0.045 [1.14]	0.050 [1.27]	0.085 [2.16]	-
3/8 [9.52] ≤ t < 3/4 [19.05]	0.055 [1.40]	0.060 [1.52]	0.085 [2.16]	0.090 [2.29]
3/4 [19.05] ≤ t < 1 [25.04]	0.060 [1.52]	0.065 [1.65]	0.085 [2.16]	0.100 [2.54]
1 [25.40] ≤ t < 2 [50.80]	0.070 [1.78]	0.075 [1.90]	0.095[2.41]	0.115 [2.92]
2 [ 50.80] ≤ t < 3 [76.20]	0.125 [3.20]	0.150[3.80]	0.175 [4.45]	0.200 [5.08]
3 [76.20] ≤ t < 4 [101.6]	0.150 [3.81]	0.160 [4.06]	0.200 [5.08]	0.225 [5.72]
4 [101.6] ≤ t < 6 [152.4]	0.180 [4.75]	0.200 [5.08]	0.335 [8.50]	0.355 [9.02]
6 [152.4] ≤ t < 8 [203.2]	0.235 [6.00]	0.255 [6.48]	0.355 [9.02]	0.435 [11.0]
8 [203.2] ≤ t < 10 [254.0]	0.315 [8.00]	0.335 [8.50]	0.435 [11.0]	0.550 [14.0]