CA6NM stainless steel pipe

CA6NM stainless steel pipe not only has good corrosion resistance, weldability, but also has high strength and low temperature toughness . CA6NM belongs to low carbon martensite stainless steel, mainly used for hydropower facilities and mine facilities of the wear parts. Such as turbine blades, turbine, roller screen/feeder.
Not only to undergo general corrosion medium, but also to endure the erosion of the sediment, cavitation erosion at runtime. Poor use conditions.

 

Compare CA6NM and 17-4 ph. CA6NM stainless steel pipe has higher strength, hardness, resistance to cavitation erosion, also keep good toughness and fatigue resistance, underwater and has better weldability

CA6NM Heat treatment
CA6NM Heat treatment

Not only CA6NM stainless steel  has good corrosion resistance, weldability, but also has high strength and low temperature toughness .

CA6NM Stainless steel
CA6NM Stainless steel pipe
  • The casting of CA6NM stainless steel  has many advantages in application Its advantages are as follows:
    1.High strength and high toughness Rp0.2 > 600 MPa Rm > 800 MPa A > 18% Z > 50% A kv > 100 j.
    2 Good low temperature impact properties, fracture toughness and FATT (Brittle transition temperature of -173 ~ -196 ℃).
    3 Good welding yao casting and machining performance.
    4 Good underwater fatigue resistance and cavitation erosion and wear resistance.
    5 High harden ability and good mechanical properties, with heavy section.
    6 CA6NM stainless steel castings good engineering nondestructive testing performance.
  • But CA6NM stainless steel  has its prominent shortcomings and engineering practice. Must solve the key technical problems of its shortcomings as follows,
  • 1.The sensitivity of the composition and microstructure deviation.
    2.Heat treatment process control and the sensitivity of the mechanical properties change.

    CA6NM microstructure
    CA6NM microstructure

    3.The phase change process and the complexity of the stress control.

  • 4.It’s easy to have a cold crack defects.

 

Through the optimization process. We produce CA6NM tube, meeting with ASTM A743 and Astm487, and exported to Quebec, Canada. The microstructure of 100% martensite.

 

 

 

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X2Cr13 + QT conveyor roller of rolling mill

roller

X2Cr13 + QT conveyor roller of rolling mill:

Products type: X2Cr13 Conveyor roller of rolling mill.

Producing Date:2015-1.

Material: X2Cr13 + QT conveyor roller

Forgings, Martensitic stainless steel.

Country:Germany.

Client:SMSDEMAG.

The  conveyor roller of rolling mill producing process: Forged round  of martensite—- Tempered —- Rough machining—- Finishing —-Inspection— Packaging.

The material is a chrome-alloyed heat treatable steel with medium carbon content which is rust proof. It has a good corrosion resistance because of its chrome content in moderate aggressive, non chloric substances like soap, solvents and organic acid.

This material shows its highest corrosion resistance with fine grinded and polished surface. The machinability of the material is comparable with alloyed heat treatable steels and causes no significant difficulties.

The material can be hardened by holding the temperature between 950°C and 1050° C with a subsequent cooling in air, oil or polymer. The strength of the material depends on the tempering temperature.It is usually divided in two heat treatment conditions, QT700 and QT800. This material is used in mechanical engineering and power engineering.

X2Cr13 roller
X2Cr13 + QT conveyor roller of rolling mill

 

 

 

roller
X2Cr13 conveyor roller of rolling mill

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Martensitic stainless steel and austenitic Stainless Steel

stainless steel tube1.Austenitic Stainless SteelIt contains more than 18% of chromium, also contains about 8% of nickel and a small amount of molybdenum, titanium, nitrogen and other elements. Which has good overall performance , corrosion resistant variety of media and its normal grades are: 1Cr18Ni90Cr19Ni9 and others. 0Cr19Ni9 contains C<0.08% which contains amount of Ni and Cr.The steel was austenitic state at room temperature. Such steel has good ductility, toughness, weld ability and corrosion resistance which has good corrosion resistance in both oxidizing and reducing media. So they are used to make equipments anti nitric acid such as anti corrosion containers and equipment lining, transport pipelines, parts of anti nitric acid corrosion. Austenitic stainless steel commonly treated by solution treatment that is heated to the upcoming 1050 ~ 1150 , then cooled to obtain single- phase austenite.

 

2. Duplex stainless steel: It has the advantages of both austenitic and ferritic stainless steel, and has super plasticity. Austenitic and ferritic stainless steel is of about half. In the case of containing a low C, Cr content of 18% ~ 28%, Ni content of 3% to 10%. Some steel further contains Mo, Cu, Si, Nb, Ti, N and other alloying elements. It has both austenitic l and ferritic stainless steel features. Compared with ferrite, it has higher ductility and toughness, no brittle at room temperature. Resistance to intergranular corrosion and welding properties are significantly improved. Meantime it maintains 475 brittleness of ferritic stainless steel and high thermal conductivity, with super plastic characteristics.Compared with the austenitic stainless steel, it has high strength and has significantly improvement in resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless steel has excellent resistance to pitting corrosion and a nickel saving stainless steel.

 

3. Martensitic stainless steel: Martensitic stainless steel has high strength but ductility and weld ability are poor. Martensitic stainless steel normal grades are:420、430、410、409 and others.Due to higher carbon contents, Martensitic stainless steel has a high strength, hardness and wear resistance, but somewhat less corrosion resistance. Martensitic stainless steel are normally used for some parts which require higher mechanical performance and general corrosion requirements, such as springs, turbine blades, valves of hydraulic machines. Such steel is used after quenching, tempering.