With the plastics injection molding industry and the continuous development of extrusion technology, a variety of functions of the constant introduction of new plastic, as well as the recycling of waste plastics.

Operating conditions for Screw and barrel the more complex and heavy, bad, how well solution to the screw and barrel wear and tear corrosion problems become the focus of each business research.

Jnha people continue to improve the alloy's formula, as well as the introduction of advanced casting equipment, developed with the success of 50% tungsten nickel30% and 15% of the cobalt alloy, the success of the solution to corrosion, wear and tear issues.

Dual-use technology for processing metal barrel, there are the merit of high hardness, abrasion resistance, corrosion resistance. Twin-alloy barrel performance was ordinary steel nitride about three times, and wider use of special plastics production.

At present, our twin-alloy processing barrel range in diameter Φ15-Φ200, a length of 8000mm.

We list our main twin-alloy technical and material as following:

Alloy name	JH-1	JH-2	JH-3	JH-4	JH-5	JH-6
Application quality	Wear resistance	Wear resistance	Corrosion resistance	Hydrofluoric acid-resistant	High wear resistance and corrosion resistance	Top wear and corrosion resistance
(HRC) hardness	55-65	58-61	48-54	55-62	55-64	58-66
alloy	Fe-Ni-B	CR-Alloy	Ni-CO-CR-B	Ni- Fe	Ni-W-CR-B	Ni-W-CR-B
Ultimate tensile strength	52,000	52,000	51,000	50,000	58,000	59,000
Stretching to the breakdown（%）	0.20	0.19	0.21	0.16	0.18	0.19
density	0.274	0.282	0.302	0.302	0.360	0.365
weigh	7.57	7.68	7.94	7.96	9.80	10.04