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Nanjing Xidiou Stainless Steel Co., Ltd.

China Manufacturer with main products: Fastener, Stainless Steel, Factory, Manufacture

Home  >Products Catalog > Duplex stainless steel > nuts and bolts 1.4410 heavy hex

nuts and bolts 1.4410 heavy hex

FOB Price: 10.00 USD/Piece
Supply Ability: 10,000 Piece/Pieces per Week
Shipping: shanghai port
Payment Terms: T/T
In Stock

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Export Markets: South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Jiangsu in China
Packaging Details: Carton, Wooden box

Specifications

aterial :
304  304L 347 316 316L 316Ti 317L 254SMO 654SMO AL6XN 310S 309S 2205 2507 321 S32760 Monel400 Monelk500 Inconel718 724L Hastelloy C276 C22 C4 GH2132 A286 316Ti Inconel625 Alloy59 Inconel600 Inconel925  Inconel825 GH3030 Alloy20 347 17-4PH Alloy800

Standards: GB ,ANSI/AMSE, DIN, JIS and BS,UNI etc
 
Product Range:
Bolt, nut, washer, thread rod ,round bar,rivets and other fasteners and stainless steel products.
Our Feature:
1.Fast Delivery
2.Factory sales
3.small order accepted (50 pieces)
4.mill test certifecate can be provided
Metric size: M6 to M100
Inch size :  1/4" to 2 1/2
Nut: M3-M64 (hexagonal, flange)
  Threaded Rod:4-3000mm (all thread, double end thread)

 
SAF 2507(UNS S32750) Duplex Stainless Steel 1.4410
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General Properties
Alloy SAF 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 SAF 2507 is not recommended for applications which require long exposures to temperatures above 570F because of the risk of a reduction in toughness.
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Applications
Oil and gas industry equipment
Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems
Chemical process industries, heat exchangers, vessels, and piping
Desalination plants, high pressure RO-plant and seawater piping
Mechanical and structural components, high strength, corrosion-resistant parts
Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping
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Standards
ASTM/ASME .......... A240 - UNS S32750
EURONORM............ 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR.................... Z3 CN 25.06 Az
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Corrosion Resistance
General Corrosion
The high chromium and molybdenum content of SAF 2507 makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid. SAF 2507 also provides excellent resistance to inorganic acids, especially those containing chlorides.
In dilute sulfuric acid contaminated with chloride ions, SAF 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, SAF 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
SAF 2507 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 SAF 2507 provides excellent resistance to chloride stress corrosion cracking (SCC). Because of its higher alloy content, SAF 2507 is superior to 2205 in corrosion resistance and strength. SAF 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 SAF 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. SAF 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of SAF 2507 and several other high-performance stainless steels are shown above.

 

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