Black zinc plated 303 Stainless steel weld bolt.

Description

303 stainless steel is an austenitic free-cutting stainless, wear-resistant acid steel. In order to improve the performance of the steel, no more than 0.60% of molybdenum can be added to the steel to resist ablation.
Mechanical properties of 303 stainless steel after annealing and stress relief, the tensile strength is 515MPa, the yield is 205MPa, and the elongation rate is 40%.
303 is a free-cutting stainless steel that contains sulfur and selenium, respectively, and is used in occasions that mainly require free-cutting and high surface finish.

Black zinc is used to passivate the black after electroplating zinc. Black zinc plating is a kind of metal anti-oxidation processing, and the black passivation film can be used for decoration, matting and solar heat absorption.

It should be noted that the surface of the black zinc-plated zinc should be black and bright.

First, choose a good passivation solution. The difference between different brands of passivation solution is very large.

Second, the temperature and time control during passivation are different. The product needs different passivation time.

Third, is to pay attention to the drying method.

Factory Diaplay

Plating line

Test equipments

Q1:If you can not find on our website the product you need how to do?

You can send the pictures/photos and drawings of the products you need by email , we will check if we have them. We develop new models every month, Or you can send us samples by DHL/TNT, then we can develop the new model especially for you.

Q2:Can You Strictly Follow The Tolerance on The Drawing And Meet The High Precision?

Yes, we can, we can provide high precision parts and make the parts as your drawing.

Q3:How to Custom-made (OEM/ODM)

If you have a new product drawing or a sample, please send to us, and we can custom-made the hardware as your required. We will also provide our professional advices of the products to make the design to be more realized & maximize the performance.

Q4:Which mode of transport would be better?

In general, the production are heavy, we advice to make delivery by sea, Also we respect your views of other transportation as well.

About us

Jiaxing Dexun Co., Ltd. was established in 1997, origin from Taiwan, we are professional manufacturer and exporter integrated with design, research & development, manufacturing and sales of OEM/ODM stamping parts,deep drawing parts, standard welding fasteners and non-standard welding fasteners.

* Located in jiaxing city, only about 1 hour's drive from Shanghai, Hangzhou, Ningbo, Suzhou, these important cities, the transportation is very convenient.

* 2 mature mould development workshops with advanced equipment to develop mould for customers.

* 2 International approvals,Verify & certificate in accordance with ISO9001,IATF16949, work with SGS, operate the PPAP Level 3.

* 2 labs of quality inspection,Control products quality strictly; equipped with various quality testing machines including direct-reading spectrometers, tensile testing machines, CMM machine, X-ray flaw detection instrument.

* 2 quenching and tempering heat treatment lines.

* 2 automatic welding lines.

* 4 Powder coating & Painting lines, Plating lines

* 42 people professional R&D team : 30 special technicians and 12 senior engineers.

* 20 years’experience on manufacturering OEM/ODM products

* 100 sets of automatic production machines: Have 10 sets of automatic stamping & deep drawing equipments, 50 cold forming machines; 40 tooth grinding machines ,equipped with Japan, Germany,etc imported machines.

* 175 employees

* 10 millions monthly production capacity

* 35 countries exported to

* Supplying products to GM,John deere,Wal-Mart，etc

* Implement environment protection concept; strictly operate the facilities and processes under environmental requirements.

We use advanced equipment to improve cost and quality at the same time to make sure lowest price and best quality for customers. We have quality control experts & engineers to test every piece product before shipment. We keep on studying to provide professional service.

Our Mission & Vision

We always work hard to be an environment protection model enterprise. We strive for sustainable development. We hope to be a win-win partner of our customers all over the world.

Environment protection mission:

A full series of environment policies are applied to our every manufacturing activities. Firstly, to propagandize environment protection policy to make sure environment-friendly concept is everywhere in our company.
Every new staff will have environment protection training class. All staffs have environment protection knowledge and policy lecture every month. All the operation manual will marked out environment protection requirements.
Secondly, to establish environment protection responsibility policy.
Thirdly, to have basic environment protection management.
Step 1: Have environment monitor every time.
Step 2: Manage the pollutant treatment equipment efficiently.
Step 3: Establish permit system of pollutant discharge.
Step 4: Establish legal audit system.
Fourthly, to build up emergency rescue system.