Super Lowest Price 10mm Axle Bolt - NPR TRUCK REAR Wheel Bolt factory wholesale – JINQIANG Detail:
Manufacturing process of high strength bolts
Shelling and descaling of high-strength bolts
The process of removing iron oxide plate from cold heading steel wire rod is stripping and descaling. There are two methods: mechanical descaling and chemical pickling. Replacing the chemical pickling process of wire rod with mechanical descaling improves productivity and reduces environmental pollution. This descaling process includes bending method, spraying method, etc. The descaling effect is good, but the residual iron scale cannot be removed. Especially when the scale of the iron oxide scale is very strong, so the mechanical descaling is affected by the thickness of the iron scale, the structure and the stress state, and is used in carbon steel wire rods for low-strength fasteners. After mechanical descaling, the wire rod for high-strength fasteners undergoes a chemical pickling process to remove all the iron oxide scales, that is, compound descaling. For low carbon steel wire rods, the iron sheet left by mechanical descaling is likely to cause uneven wear of grain drafting. When the grain draft hole adheres to the iron sheet due to the friction of the wire rod and the external temperature, the surface of the wire rod produces longitudinal grain marks.
Our Hub bolt quality standard
10.9 hub bolt
| hardness | 36-38HRC |
| tensile strength | ≥ 1140MPa |
| Ultimate Tensile Load | ≥ 346000N |
| Chemical Composition | C:0.37-0.44 Si:0.17-0.37 Mn:0.50-0.80 Cr:0.80-1.10 |
12.9 hub bolt
| hardness | 39-42HRC |
| tensile strength | ≥ 1320MPa |
| Ultimate Tensile Load | ≥406000N |
| Chemical Composition | C:0.32-0.40 Si:0.17-0.37 Mn:0.40-0.70 Cr:0.15-0.25 |
FAQ
Q1: What else products you can make without wheel bolt?
Almost all kinds of truck parts we can make for you. Brake pads, center bolt, U bolt, steel plate pin, Truck Parts Repair Kits, casting, bearing and so on.
Q2: Do you have an International Certificate of Qualification?
Our company has obtained the 16949 quality inspection certificate, passed international quality management system certification and always adhere to automotive standards of GB/T3098.1-2000.
Q3: Can products be made to order?
Welcome to send drawings or samples to order.
Q4: How much space does your factory occupy?
It’s 23310 square meters.
Q5: What is the contact information?
Wechat, whatsapp, E-mail, mobile phone, Alibaba, website.
Q6: What kind of materials are there?
40Cr 10.9,35CrMo 12.9.
Q7: What is the surface color?
Black phosphating, gray phosphating, Dacromet, electroplating, etc.
Q8: What is the annual production capacity of the factory?
About a million pcs of bolts.
Product detail pictures:
Related Product Guide:
The business keeps to the operation concept "scientific management, premium quality and efficiency primacy, customer supreme for Super Lowest Price 10mm Axle Bolt - NPR TRUCK REAR Wheel Bolt factory wholesale – JINQIANG , The product will supply to all over the world, such as: Madras, UK, Tunisia, Our professional engineering group will always be ready to serve you for consultation and feedback. We're able to also offer you with absolutely free samples to meet your requirements. Finest efforts will likely be produced to offer you the ideal service and goods. For anyone who is thinking about our company and merchandise, be sure to contact us by sending us emails or contact us quickly. As a way to know our merchandise and firm. lot more, you can come to our factory to find out it. We'll always welcome guests from all over the world to our business to build company relations with us. Be sure to feel free to get in touch with us for business and we believe we've been intending to share the top trading practical experience with all our merchants.
By May from San Diego - 2018.10.09 19:07
In China, we have purchased many times, this time is the most successful and most satisfactory, a sincere and realiable Chinese manufacturer!
By Roxanne from Costa rica - 2018.02.04 14:13
