Ningbo Jinhua Plastic Machinery Co., Ltd.

Products

	Injection Molding Machiner Screw

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Model Number

JIS SACM645

With the fast developing machine,both the screw rotation speed and the pressure in the barrel are increased,Also with the very fast speed research and development of engineering plastic and modified plasic,the ordinary screw and barrel made of nitriding steel can’t meet the requirement of abrasion,corrosion and high temperature.Based on the actual requirement Jnha Factory has developed and introduced the materials which are fit for the modern plastic processing.And these materials have a lot of advantages,such as high precision,high hardness and high wear resistant and anticorrosion,Raw materials of Jnha Factory include alloy steel,stainless steel and CPM tool steels,The grades of materials are listed in the following chart,their properties and the relative document applied are summarized

material	Yield Force MPA	Effective hardness	Treatment Mode	Surface Wear Resistance	Bottom Layer Resistance	Anticorrosion
Alloy Steel
JIS SACM645(38CrMoALA)	890	56-62Rc	Nitriding	Good	Bad	Bad
AISI4140 (42CrMo)	689	48-56Rc	Quench	Ok	Bad	Bad
AISI 4340	758	48-56Rc	Quench	Ok	Bad	Bad
NITRALLOY 135M	586	60-70Rc	Quench	Good	Good	Bad
Tool Steels
D-2	2068	58-60Rc	Quench	Good	Good	Bad
CPM-9V/V4	1965	52-55Rc	Quench	Good	Good	Ok
VPM-590/V10	22411	56-59Rc	Quench	Good	Good	Good
Stainless Steel
304	241	48-56Rc	Quench-Alloy	Good	Bad	Good
316	241	48-56Rc	Quench-Alloy	Good	Bad	Good
416	793	56-60Rc	Quench-Alloy	Good	Bad	Good