Material
38 CrMoAlA(JIS SACM645); 42CrMo(JIS SCM440)
Hardness of nitrogen treatment
HV900°~1100°
Tempering hardeness
HV240 ° ~280°
Depth of nitrogen layer:
0.6~0.8mm
Nitrided Brittleness
above 1 stage
Surface Roughness
Ra0.4 um
Screw straightness
0.015mm
Hardess of surface chromium-plating after Nitriding
HV≥950HV
Chromium plating Depth
0.025-0.085mm
Alloy Depth
2.5mm-4mm
Alloy hardness
HRC62°~72°
Heating-treatment
nitrogen ,electroplated hard -chrome finish,high frequency quenching

Technological Process:

Blanking, Rough Machining, Quenching & Tempering, Semi Finishing Machining, Finished Product, DetectingNitring/Alloy Processed, Finish Machining


Packing for Stainless steel screw and barrel

1) Wooden case package
2) Plastic film package
3) Suitable to transportation
4) As buyer request
5) One piece into one package


FAQ
Q1:What are we?
A:We are factory, with license of import and export goods by ourself.
Q2:How to get to us?
A:The nearest airport is Wenzhou airport, and the nearest train station is Ruian station.
Q3:How do we control the quality of screw barrel?
A:We have professional engineer and staffs to check every detail and dimensions from the raw materail, nitrding treatment and super grinding. We do the crucial nitriding treatment by ourself,


Company view :


Zhejiang pinbo plastic machinery co.,ltd is located in ruian wenzhou city with brand of PYM(Former Ruian yumin machine screw co.ltd since 1988). The company is specialized in making screw barrel, gearbox zlyj series, t die, filter and extruder machine. It has become one of the largest supplier of main parts in Ruian city which is the basement of plastic machines. 
It owns many computer-control CNC milling machines in length 8000mmIn Fanuk series, 18000mm 
length deep hole drilling machine and other advanced equipment.Long time nitriding treatment 
for 7days and nights greatly ensure the hardness and lifetime of its products.



Dear customer, if you already have suppliers or are looking forsuppliers, have a try to believe us, we are sincerely welcome you and want to cooperate with you.