DIN X17crni16-2 AISI 431 Industrial Stainless Steel Tube

Product Description

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	-	-	-

Description
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. 

Applications
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.

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

Tempering
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.

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

Machinability
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.

Welding 
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
l steel plate
l steel sheet
l 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
l 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
 
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 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.


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