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Base Materials:

1)38CrMoAlA(SACM 645)

2)42CrMo(AISI 4140)

3)Cr12MoV(SKD11)

4)4Cr5MoSiV1(SKD61)

5)9Cr18MoV

6)40Cr

Bimetallic Alloy Materials:

1)Fe-based alloy

2)Ni-based alloy

3)Co-based alloy

4)Tungsten carbide

Processing Technology: 

Heat treatment

High-frequency quenching 

Nitriding treatment

Hard-chrome electroplating 

Bimetallic alloy welding

Technical Parameter:

Nitrided layer depth:0.50-0.80mm

Nitrided hardness: 950-1100HV 

Nitrided brittleness: Less than 2 level

Surface roughness: Ra 0.4 μm

Linearity of screw: 0.015mm

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth: 0.025~0.10mm 

Bimetallic layer depth: 3-5 mm

Bimetallic hardness: HRC60-70

Terms and Conditions:

Means of transport: Ocean,Air,Express

Production time:About 20-35 days after we receive the advanced payment

Compared to other supplier, 

JINMAO advantages:

1.Advanced Nitriding Technology

2.Hard Metal Cold/Thermal Spraying Technology

3.Anti-corrosion and Wearresisting Duplex Metal 

Spraying Technology

4.Advanced PTA/HVOF process Technology

5.High output, good plasticizing effect,energy saving

6.Wear resistant&Corrosion resistant, longer using life of screw barrel              

7.Fast production&Rapid delivery  

8.Best customer service!