JX-21JG3378-D5-7.9-L12.4-ST, Carbon steel machined parts pins for medical equipment, communication equipment industrial manufacturing, surface treatment electroplating environmental protection ROHS blue-white zinc

20 #steel contains slightly higher carbon content, the metallographic organization of both is pearlite + ferrite. Reflected in the performance of the performance of the 20 steel tensile strength and impact toughness is slightly higher, basically there is no major difference between the two types of steel. Both sheets of steel are quenched without fire, and the heat treatment process is relatively simple, usually the blank is directly cutting processing.

1. 20 # steel is low-carbon steel.

2. 20 means the carbon content is 0.2%, most low carbon steels are less than 0.25%; most medium carbon steels are between 0.25 ~ 0.60%; most high carbon steels are greater than 0.60%.

3. It is also called soft steel because of its low strength, hardness, and softness.

4. including most ordinary carbon structural steel and some high-quality carbon structural steel, most of them are used for engineering structural parts without heat treatment, and some of them are used for wear-resistant mechanical parts after heat treatment such as carburizing.

Difference between blue zinc plating and white blue zinc plating:

1. Appearance color: The difference is only in the appearance color, blue galvanized and white blue galvanized.

2. Corrosion resistance: The corrosion resistance of blue galvanized is greater than that of blue-white galvanized. Blue and white galvanized is electro-galvanized. Electro-galvanized is originally white, and blue galvanized is blue and white galvanized, which is a relatively inexpensive and easy-to-coat metal compared to other metals. It is a low-value anti-corrosion coating and is widely used to protect iron and steel parts, especially from atmospheric corrosion, and also for decoration.

In order to prevent some iron from rusting, we use the principle that an energized conductor will adsorb atoms from the solution to coat the surface of the iron with a thin layer of zinc, which can be blue-white zinc, black zinc, colored zinc, etc. As required. The colored zinc passivation film is mostly used for industrial parts, and colorless zinc passivation film is mostly used for daily-use hardware, architectural hardware, and other products that require a uniform white surface. The color shade of galvanized passivation film is also related to the thickness of the film. And the film thickness is related to the passivation time or the residence time in the air. In the low-chromium and ultra-low-chromium passivation solution, the passivation film is formed in solution with long passivation time and thick film, and short passivation time and thin film. A good passivation film should be complete with five bright colors. The red-brown film is loose and not well bonded to the zinc layer. The green passivation film may be very thin, which will affect corrosion resistance. From this, we can initially judge the quality of the passivation film by appearance, bonding with the zinc layer, film integrity, brightness, and color.

Packing: Inner is Poly foam, out is carton. Then pallet. Carton size: 29*19*19.5CM and 23.5*17.5*8, CM and pallet size is: 215*100*90CM, or as your requirement.

Packaging & Delivery and Packaging Details

1. Shrink film+wooden box

2. Cardboard box+pallet

3. Color box

4. As per the customer's request