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Home > Products > Alloy And Carbon Steel > Steel Pipe > DIN X17crni16-2 AISI 431 Industrial Stainless Steel Tube

DIN X17crni16-2 AISI 431 Industrial Stainless Steel Tube

Basic Info

Model No.:  AISI 431

Product Description

Model NO.: AISI 431 Technique: Forged Surface Treatment: Polished Section Shape: Round Product Name: DIN X17crni16-2 AISI 431 Stainless Industrial Stee MOQ: 1 Ton Shipping: by Sea, Air Grade: DIN X17crni16-2 AISI 431 Application: Boiler Plate Transport Package: Standard Seaworthy Package or as The Customers′ Re Origin: China Type: Oil&Gas Material: Oil&Gas Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose Key Word: Stainless Steel Tube Certificate: ISO9001:2008 Payment Term: L/C, T/T Delivery Term: Fob, CIF, CFR, Ex-Work, etc. Shape: Round Pipe Trademark: Dongbei Special Steel Specification: customized sizes Production Description:
1. Steel Grade: DIN X17crni16-2 AISI 431
2. Product name: DIN X17crni16-2 AISI 431 Stainless Industrial Steel Pipe
3. Length: 20m maximum 
4. Outside diameter: 3mm - 219mm
5. Wall thickness: 0.5 - 35mm

Steel AISI 431 (Mat.No. 1.4057, DIN X17CrNi16-2, AISI 431) 

Designation by Standards
Brand Name Ravne No. Mat. No. DIN EN AISI
AISI 431 911 1.4057 X17CrNi16-2 X17CrNi16-2 431

Chemical Composition (in weight %)
C Si Mn Cr Mo Ni V W Others
0.17 max. 1.0 max. 1.50 16.00 - 2.00 - - -

431 is a martensitic stainless combining excellent impact strength at high hardness levels with the best corrosion resistance of any martensitic stainless steels. Steel with high polishability. For application up to working temperature 500oC. 

431 has been successfully used in a variety of aircraft and general industrial applications. These include fasteners, shafts, bolts, valve components and chemical equipment, components for dairies, machine building and paper industry. 

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 216 
Density [g/cm3]: 7.70
Thermal conductivity [W/m.K]: 25.0 
Electric resistivity [Ohm mm2/m]: 0.70
Specific heat capacity[J/g.K]: 0.46

Modulus of Elasticity [103 N/mm2]
20oC 200oC 400oC
216 205 190

Coefficient of Linear Thermal Expansion 10-6 oC-1
20-100oC 20-200oC 20-300oC 20-400oC 20-500oC 20-600oC 20-700oC
11.2 11.5 11.7 11.9 12.0 12.1 12.0

Continuous Cooling Transformation (CCT) Diagram

Click the image to enlarge the diagram.

Soft Annealing
Heat to 660-750oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 295.

Harden from a temperature of 980-1030oC followed by oil or air quenching. Hardness after quenching is about 47 HRC.

Tempering temperature: For Q+T 800: 750-800oC. For Q+T 900: 600-650oC.

0.2 % Proof Stress (N/mm2) at Elevated Temperatures
Condition 100oC 150oC 200oC 250oC 300oC 350oC 400oC
Q+T 800 515 495 475 460 440 405 355
Q+T 900 565 525 505 490 470 430 375

Diagram Tempering Temperature - Mechanical Properties

Click the image to enlarge the diagram.

Hot forming temperature: 1100-800oC, slow cooling. 

In the fully annealed condition, 431 will gall and build up on the tools. Good surface finishes are not easily obtained.

Corrosion Resistance 
431 is superior to all other martensitic grades in terms of corrosion resistance. Will resist dilute acids and alkalis, neutral and basic salts, food acids, fresh water and atmosphere.

Most electric welding procedures have proven successful with 431 stainless. Filler metal should be AWS E/ER410.To avoid cracking, pre-heat the workpiece to 204-316oC. After air cooling, treat at 649oC to reattain maximum properties.

Embittlemnt: It must be in mind that the temperature range between 425 and 525oC must be avoided owing to embritllement at 475oC.

Cold working 
This alloy is easily drawn, spun, headed, sheared and bent compared with other stainless steels.

Company Information:

Bozhong Group Mainly supply in forms of coil, sheet, plate, rod, bar, tube, pipe, beam, angle, flange, wire, strip, channel, etc., with various varieties, wide range of dimensions, high purity, stable chemical composition, high dimensional accuracy and excellent surface quality. The products are mainly used in the fields of industries such as automobile engineering, railway transportation, aviation, aerospace, machinery, petrochemical, energy, environmental protection, offshore, chemical, oil & gas, ilitary, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.

steel coil
Steel Plate
l steel sheet
Steel Bar/rod
    Steel Round Bar
    steel flat bar
    steel square bar
l steel pipe/tube ( welded or seamless )
    steel round pipes
    steel square pipes
    steel welded tubes
    steel seamless tubes
l steel strip
l steel beam
l steel angle
l steel channel
l steel flange
Steel Wire
Bozhong Group can supply a variety of structural steel, high-strength steel, wear-resistant steel plate, boiler and pressure vessel steel, marine engineering and stainless steel plate in the thick steel and various European standard bars and pipes and profiles.Our global sales and service network throughout all around the world to ensure that the goods reach the customer in the shortest time.
We can follow your drawings and requirements, to provide you with oxygen cutting, plasma cutting and laser cutting and other processing services. You can also perform ultrasonic testing in accordance with EN10160 standard, EN10164 standard test Z15, Z25, Z35, weld bending detection, PWHT detection,etc.
We have ISO9001: 2000 quality management system certification, and obtain the quality certification from all the well-known certification company, including TuV / LRS / GL / CE and so on.
Special steel includes as below:
Boiler and pressure vessel steel
Pipeline steel
Bridge steel
Nuclear power steel
Structural steel
Die steel
High strength steel
Abrasion resistant steel
Weathering, corrosion resistant and fire resistant steel
High rise building steel
Shipbuilding and offshore engineering steel
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 don'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 you provide a sample for our testing before confirm the order?
A: Yes. We can provide sample to you for approval before you place an order to us. Free sample is available if we have stock.
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.

Customer Visiting:

Warmly welcome! Pick up your phone and Call us!
Send us the inquiry here!
We will reply you at the first time.

Contact us if you need more details on AISI 431. We are ready to answer your questions on packaging, logistics, certification or any other aspects about DIN X17crni16-2、Steel Pipe. If these products fail to match your need, please contact us and we would like to provide relevant information.

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