JX-21QJG382-M6-15-ST, CNC carbon steel machined auto parts used in the automotive industry to manufacture the tail part, surface treatment electroplating environmental protection ROHS black zinc

（1）22A: also known as swrch22a, is the material specified in JIS G3539, the name is Carbon Steel Wire for cold heading and cold forging, and carbon steel wire for cold interpreting.22A wire rod in the small embryo calendering into wire rod, the small embryo needs to grind off the surface of the surface defects harmful to the subsequent forging (such as Seam seam) to avoid cracking when forging, the use of this wire in Taiwan is a guarantee of non-cracking.

（2）20 # steel: high-quality carbon structural steel cold extrusion, carburized hardened steel. The steel strength is low, and toughness, plasticity, and weldability are good.20 # steel: cold deformation plasticity, generally for bending, calendaring, bending edge and hammer arch processing, arc welding, and contact welding performance is good, gas welding thickness is small, strict shape requirements or complex shape of the parts prone to cracking. Cutting processability cold-drawn or annealed state is better than the annealed state, generally used in the manufacture of not much force and high toughness requirements.

Advantages of automotive parts

Auto parts are an indispensable part of automobile manufacturing, and their quality and performance are directly related to the performance and safety of the whole automobile.Differentiation between environmental protection black zinc plating and general black zinc plating

1, product appearance, normally trivalent chromium passivation is not as black as hexavalent chromium, good appearance, but the current level of trivalent chromium is developing rapidly, the appearance can basically reach the very black requirements, but generally, trivalent chromium can do very black, if the salt spray test is not too good. 2, formula, hexavalent chromium current formula or silver nitrate is the main, this is easy to see.

3, salt spray test, very black, or hexavalent chromium is currently some good.

4, cost, the two actually about the same, hexavalent chromium high unit price, but the amount of less, trivalent chromium and vice versa.

5, the best way to distinguish, or analyze the passivation solution or passivation film is the main metal composition, trivalent chromium is the main component of trivalent chromium and cobalt, and hexavalent chromium is the main metal composition of hexavalent chromium and silver.

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