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Duplex ASTM 2507 Stainless Steel Bar Cold Drawn Techniques Peeled Surface

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SHANGHAI UNITE STEEL

Duplex ASTM 2507 Stainless Steel Bar Cold Drawn Techniques Peeled Surface

Country/Region	china
City & Province	shanghai shanghai

Product Details

INTRODUCTION

Duplex 2507 (UNS S32750) 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 nickel levels provide excellent resistance to pitting, crevice, and general corrosion.

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

Steel Grade	2507	Application	Mentioned above
Shape	Round Bar	Standard	GB, ASTM, DIN,JIS
Dimension	Φ4-800 mm; length below 10m	Surface	Black, Bright, Polished, Peeled
Technique	Cold drawn; Hot rolled; Forged	Ultrasonic Test	100% UT Passed

DELIVERY CONDITIONS

	Diameter (mm)
Cold drawn	4-60
Peeled	30-100
Grinded	4-600
Turned	130-800
Hot Rolled	20-280
Hot Forged	130-800

EQUIVALENT GRADES

ASTM/ASME: UNS S32750
EURONORM: X2CrNiMoN25-7-4
DIN: 1.4410

CHEMICAL COMPOSITION (%)

2507

S32750

≤

0.02

≤

0.80

≤

1.20

≤

0.035

≤

0.020

24.00

26.00

3.00

4.00

6.00

8.00

0.20

0.30

0.50

1.00

0.50

1.00

MECHANICAL PROPERTIES

Grade	Tensile Strength ksi (min)	Yield Strength 0.2% ksi (min)	Elongation %	Hardness (Rockwelll C) MAX
2507	116	80/91	15	217

Corrosion Resistance

General Corrosion

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

Low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment.
Is highly resistant to carbide-related intergranular corrosion.

Stress Corrosion Cracking

Duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC).
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.

Crevice Corrosion

Highly resistant to crevice corrosion.

PROCESSING

Hot Forming

2507 should be hot worked between 1875°F and 2250°F. This should be followed by a solution anneal at 1925°F minimum and a rapid air or water quench.

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.

Heat Treatment

2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 1925°F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.

Welding

2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.

Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 300°F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.

What we can offer?

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.

Shape Available

Solid round bar
Flat bar
Square bar
Hexagon bar
Block
Plate
Sheet
Wire rod
Strip

Our Advantages

High mechanical property and quenching, enable the surface share equal hardness after deal with it
Good polishing and low roughness
Making the heat-treatment to harden condition before using it
Competitive price
Fast production lead-time
All the material are inspected with 3 times to meet the highly standards
Pure steel quality & stable quality to be guarantee

OUR AVAILABLE STAINLESS STEEL PRODUCTS ARE AS BELOW

PAYMENT AND SHIPPING

1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples

COMPANY INFORMATION

Shanghai Unite Steel Trading Co., Ltd

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!

FAQ

Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.

Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.

Q: What is the payment term?
A: T/T or L/C.

Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.