M4 M5 A307 GR2 Steel Blue White Zinc Plating Slotted Phillips Drive Cross Recessed Truss Head Screw

M4 M5 A307 GR2 Steel Blue White Zinc Plating Slotted Phillips Drive Cross Recessed Truss Head Screw

1,Description:

The cross-groove head screw refers to the cross-groove machine thread screw, represented by the letter PM. The state has stipulated that the thread specifications range from M1.6 to M10, the performance grades are 4.8, A-50, A2-70, CU2, CU3 and AL4, H-type and Z-type cross grooves, and the product grade is grade A cross groove head screws.

It is applicable to the production of hanging galvanizing and rolling galvanizing
The coating is soft, has high brightness and is easy to undergo chromate passivation
Bright galvanized coatings can be obtained within a wide range of current densities
It is suitable for low-cyanide galvanizing to reduce environmental pollution
The process range is wide and it is easy to operate and control

3,Specifications:

4,Feature Advantage:

Stainless steel screws are made of metal, and metal corrosion prevention methods mainly have four aspects, that is, the nature of the material itself, the use of the environment, the interface of data and the environment and the improvement of metal structure design, if the use of complete corrosion resistant alloy to manufacture stainless steel screws, unless there are special needs, otherwise in the economic concept is not cost-effective, It is also impractical to completely isolate the external surface of the screw from corrosive environmental elements. Improved metal structure design can improve the impact of special circumstances in a certain situation, but the design of most stainless steel screws can not be fully corrected, and its maintenance role is not permanent, so this method can not deal with the basic problem, as long as the surface corrosion prevention, that is, the appearance of corrosion prevention treatment is the most widely used method.

Stainless steel screw surface corrosion prevention treatment refers to the use of various methods to apply a maintenance layer on the metal surface, its role is to isolate the metal and the corrosive environment, to inhibit the corrosion process, or reduce the corrosive medium and the metal surface contact, so as to avoid or reduce the purpose of corrosion.

Corrosion resistance, wear resistance, high hardness

Excellent corrosion resistance**: Both 316 and 316L contain 2-3% molybdenum, which gives them stronger corrosion resistance compared to the 304 series, especially in chloride environments like saltwater, making them suitable for high-corrosion settings.

Food-grade stainless steel 316 and 316L are austenitic stainless steels that are widely used in industries like food processing and pharmaceuticals, where high hygiene and corrosion resistance are critical. The primary difference between the two is their carbon content. Below are their advantages and applications:

### **Advantages of Stainless Steel 316 and 316L**:

1. **Excellent corrosion resistance**: Both 316 and 316L contain 2-3% molybdenum, which gives them stronger corrosion resistance compared to the 304 series, especially in chloride environments like saltwater, making them suitable for high-corrosion settings.

2. **Good high-temperature performance**: Stainless steel 316 offers better strength and oxidation resistance at high temperatures compared to the 304 series, making it suitable for high-temperature environments.

3. **Low carbon content (316L)**: 316L is the low-carbon version of 316, with a carbon content of less than 0.03%, reducing the risk of intergranular corrosion after welding. This makes 316L ideal for food and pharmaceutical equipment that requires extensive welding.

4. **Easy to clean**: The surface of 316 and 316L stainless steel is smooth and easy to clean, effectively preventing food residues, dirt, and microorganisms from adhering, meeting food safety standards.

5. **Non-magnetic**: In their annealed state, both are non-magnetic, which is beneficial for products requiring low magnetic properties.

Common Applications**:

#### **1. Food processing equipment**:

- **Storage tanks and containers**: 316 and 316L are widely used in fermentation tanks, mixing tanks, and storage containers in the food and beverage industry, especially when dealing with acidic or salty foods.

- **Food transportation pipelines**: 316 stainless steel is used in pipelines that transport liquids and food, particularly in acidic or high-salt food production environments.

- **Meat and dairy processing equipment**: These materials provide excellent corrosion protection for equipment that handles salt, acids, and other corrosive substances in meat and dairy production.

#### **2. Pharmaceutical industry equipment**:

- **Pharmaceutical production containers**: Due to their corrosion resistance, easy cleaning, and low contamination risk, 316 and 316L are commonly used for reactors and storage tanks in the pharmaceutical industry.

- **Pipelines and transfer systems**: In pharmaceutical manufacturing, 316L is ideal for piping that transfers drug solutions and pharmaceutical-grade water, preventing corrosion during welding.

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6.FAQ