Wear Resistant and Corrosion Resistant Casting Alloy Tube

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Designation: A743/A743M-13a Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application A451ASTM A451-06 Standard Specification for Centrifugally Cast Austenitic Steel Pipe for High-Temperatu A487 Standard Specification for Steel Castings Suitable for Pressure Service A351 Standard Specification for Castings, Austenitic, for Pressure-Containing Parts A352 Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature Service A703 Standard specification for steel casting,General requirements,for pressure-containing parts Features: 1. High abrasion resistance 2. Corrosion resistance 3. Tear resistance 4. Hardness: Applications: 1. Roller screen rolls for theiron ore pelletizing industry 2. Subsequent pellet processing operation in the steel industry

Results of materials testing
Chemical Analysis (%)
Pipe No.	C	Si	Mn	P	S	Ni	Cr	Mo
CA6NM	≤0.06	≤1.00	≤1.00	≤0.04	≤0.03
ZG06Cr13Ni4Mo	≤0.06	≤0.80	≤1.00	≤0.035	≤0.025

Mechanical Properties
Pipe No.	Heat No.	Tensile Strength MPa	Yield Strength MPa	Elongation After Fracture %	Reduction of Area %	Hardness (HB)
CA6NM					285HB +-25

CA6NM stainless steel pipe not only has good corrosion resistance, weldability, but also has high strength and low temperature toughness .CA6NMbelongs to low carbon martensite stainless steel, mainly used for hydropower facilities and minefacilities of the wear parts. Such as turbine blades, turbine, roller screen/feeder. Not onlyto undergo general corrosion medium, but alsoto endure the erosion of the sediment, cavitation erosionat runtime. Poor use conditions.

CA6NM stainless steel pipe

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

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

The casting of CA6NMstainless steel has many advantages inapplication Its advantages are as follows： 1.High strength and high toughness Rp0.2 > 600 MPa Rm > 800MPa A > 18% Z > 50% A kv > 100 j. 2 Good low temperature impact properties, fracture toughness and FATT (Brittle transition temperatureof -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 CA6NMstainless steel castings good engineering nondestructive testing performance.

But CA6NMstainless steel has its prominent shortcomings and engineering practice. Must solve the key technical problems of its shortcomings as follows,

1. 2.Heat treatment process control and the sensitivity of the mechanical properties change.

Through the optimization process. We produce CA6NMtube, meetingwith ASTM A743 and Astm487, and exported to Quebec, Canada.The microstructure of 100% martensite.

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