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A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe

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A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe

A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe
A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe

Large Image :  A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe

Product Details:
Place of Origin: China
Brand Name: TOBO/TPCO/TISCO/VALIN/METAL
Certification: ISO/PED/TUV/SGS/LR/BV
Model Number: Seamless PIPE
Payment & Shipping Terms:
Minimum Order Quantity: 20 pcs
Price: negotiable
Packaging Details: Packed in carton firstly,and then reinforced with wooden case for outer packing
Delivery Time: Within 7-10 days
Payment Terms: D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 500 TONS /MONTH

A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe

Description
Application: Industry,construction,boiler,oil And Gas,Oil Gas Sewage Transport Steel Grade: Duplex Stainless Steel
Shape: Round.square.Rectangle Package: Standard Seaworthy Package,Wooden Case
Standard: ASTM,DIN,AISI,EN,JIS Welding Line Type: Seamless
Thickness: 0.1mm-60mm,1.6mm,0.2-5.0mm Material: 200 Series/300 Series/400series,Aisi304,2205,Duplex Stainless Steel,Pickling
High Light:

ASTM Duplex Stainless Steel Pipe

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UNS S31254 Stainless Steel Pipe

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A312 Duplex Stainless Steel Pipe

Seamless Austenitic Stainless Pipe A312 A999 UNS S31254 ASME ANSI Alloy Steel Titanium

 

 

FEATURES

S31254 is a high performance austentic stainless steel. Its high alloying elements content imparts excellent resistance to uniform, pitting and crevice corrosion, and stress cprrosion cracking, It was riginally developed to withstand the corrosion of acids, especially in the presence of halide ions, such as hydrochloric acid, hydrochloric acid, phosphoric acid, and sulphuric acid contaminated with chlorides. In certain environments it is an alternative to more expensive Alloy alloys and titanium alloys.

 

APPLICATIONS

Chemical processing equipment, plup and paper industr bleachin equipment, desalination plant seawater piping, food and beverage industry, pharmaceuticals, and hydrometallurgy.

 

Product name 31254 Duplex Stainless Steel Pipe
Standard ASTM A789,A790,A450,A530,GB/T14976,GB/T14975,GB/T13296,etc
Tolerance a) Outer Diameter: +/- 0.2mm
b) Thickness: +/- 0.02mm
c) Length: +/- 5mm
Surface Picked, polished
Specification 1).Heat exahanger tube for petrochemical,chemical and ocean development
2).Industrial furnace and heater tubes
3).for gas turbine and prochemical processing
4).Condenser tubes,sulfuric and phosphoric acids tubes,API tubing
5).Construction and ornament
6).Acid production,waste incineration,FGD,paper processing industrial etc
Material

Alloy : Alloy 20/28/31;

Hastelloy: Hastelloy B / B-2/B-3/C22/C-4/S/ C276/C-2000/G-35/G-30/X/N;
Haynes: Haynes 230/556/188;
Inconel: Inconel 100/600/601/602CA/617/625713/718738/X-750,Carpenter 20;
Incoloy: Incoloy 800/800H/800HT/825/925/926;
GH: GH2132,GH3030,GH3039,GH3128,GH4180,GH3044
Monel: Monel 400/K500
Nitronic: Nitronic 40/50/60;
Nimonic: Nimonic 75/80A/90 ;
Nickle: Nickle 200/201;

600 series: 13-8ph,15-5ph,17-4ph,17-7ph(630,631),660A/B/C/D,

Duplex: 2205(UNS S31803/S32205),2507(UNS S32750),UNS S32760,2304,LDX2101.LDX2404,LDX4404,904L
Others: 254SMo,253Ma,F15,Invar36,1J22,N4,N6 etc

Delivery conditions Cold Drawn and annealed
Note We can produce other standard as the customers’ requirement.

A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe 0

 

General Properties
Duplex Stainless Steel 2507 is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion.

The impact strength is also high. Alloy 2507 is not recommended for applications which require long exposures to temperatures above 570F because of the risk of a reduction in toughness.

Standards
ASTM/ASME .......... A240 - UNS S32750
EURONORM............ 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR.................... Z3 CN 25.06 Az

Corrosion Resistance
General Corrosion
The high chromium and molybdenum content of 2507 makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid. 2507 also provides excellent resistance to inorganic acids, especially those containing chlorides.

In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is a highly alloyed austenitic steel grade specially designed to resist pure sulfuric acid.

Stainless steel of type 316L (2.5%Mo) cannot be used in hydrochloric acid due to the risk of localized and uniform corrosion. However, 2507 can be used in dilute hydrochloric acid. Pitting need not be a risk in the zone below the borderline in this figure, but crevices must be avoided.

Intergranural Corrosion
2507’s low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment; therefore, the alloy is highly resistant to carbide-related intergranular corrosion.

Stress Corrosion Cracking
The duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC). Because of its higher alloy content, 2507 is superior to 2205 in corrosion resistance and strength. 2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels or where brine has been injected to enhance recovery.

Pitting Corrosion
Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions. The data above were measured by an electrochemical technique based on ASTM G 61. The critical pitting temperatures (CPT) of several high-performance steels in a 1M sodium chloride solution were determined. The results illustrate the excellent resistance of 2507 to pitting corrosion. The normal data spread for each grade is indicated by the dark gray portion of the bar.

Crevice Corrosion
The presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.

Chemical Analysis
Typical values (Weight %)

C Cr Ni Mo N Others
0.020 25 7 4.0 .27 S=0.001

PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 40

 

Cold Forming
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 austenitic 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.

 

A312 A999 UNS S31254 Super Duplex Stainless Steel Pipe 1

 

Contact Details
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Contact Person: Ms.

Tel: 13524668060

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