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Zinc Plated Caron Steel Hex Head Bolt DIN933 Fastener
Zinc plated carbon steel hex head bolts DIN933 and GB5782 fasteners are widely used in various industries, including construction, automotive, and manufacturing. These fasteners are commonly used for securing two or more objects together, and they are known for their durability and strength.
Carbon steel is a common material used for the production of hex head bolts. It is an alloy that is made up of carbon and iron, and it is known for its strength and toughness. Carbon steel is often used in the construction of buildings, bridges, and other structures, as well as in the production of various types of machinery.
One of the benefits of using carbon steel for hex head bolts is that it is relatively easy to manufacture. The production process involves heating the steel to a high temperature, which makes it more malleable and easier to work with. The steel is then shaped into the desired form and cooled, which makes it hard and strong.
Certifications
Zinc plating is often used to provide an extra layer of protection to carbon steel hex head bolts. Zinc is a metal that is known for its anti-corrosion properties, which makes it an excellent choice for use in outdoor environments or in areas where the fasteners may be exposed to moisture or other corrosive elements.
The zinc plating process involves immersing the bolts in a solution that contains zinc ions. An electric current is then passed through the solution, which causes the zinc ions to bond with the surface of the bolts, creating a protective layer. This layer helps to prevent rust and corrosion from forming on the bolts, which can reduce their strength and durability over time.
Hex head bolts are commonly used in construction applications, such as for securing beams or joists to the framework of a building. They are also used in automotive applications, such as for securing parts of a car's engine or suspension system. In manufacturing, hex head bolts are used for a variety of applications, such as for securing machinery to the floor or for securing parts together during the production process.
DIN933 and GB5782 are two common standards for hex head bolts. DIN933 is a German standard that specifies the dimensions and material requirements for hex head bolts, while GB5782 is a Chinese standard that is similar in scope. These standards ensure that the bolts are manufactured to a consistent quality and size, which makes them interchangeable with other bolts that meet the same standards.
When selecting zinc plated carbon steel hex head bolts DIN933 or GB5782 fasteners, it is important to consider the specific requirements of the application. Factors such as the size and strength of the bolts, as well as the level of corrosion resistance required, should be taken into account. It is also important to ensure that the bolts are manufactured to the appropriate standards and are installed correctly to ensure their maximum effectiveness.
In conclusion, zinc plated carbon steel hex head bolts DIN933 and GB5782 fasteners are a popular choice for a wide range of applications in various industries. They offer strength, durability, and corrosion resistance, making them ideal for use in outdoor or harsh environments. When selecting these fasteners, it is important to consider the specific requirements of the application and to ensure that they are manufactured to the appropriate standards and installed correctly to ensure their maximum effectiveness.
Stud Bolt Materials
The most common materials for stud bolts (for flanges) are ASTM A193 (grade B7, B8, B8M, B8T), ASTM A453 (grade 660), ASTM A320 (grade L7, L7M), and ASTM A182 (duplex and super duplex bolting). For aggressive fluids and environments, stud bolts can be coated with Xylan/PTFE, Zinc and other materials.
ASTM A193 Stud Bolts: Chemical Composition
| Physical Element |
ASTM A193 grade B7 (AISI 4140) |
ASTM A193 grade B8 (AISI 304) |
ASTM A193 grade B8M (AISI 316) |
| Carbon |
0.38 - 0.48% |
0.08% max |
0.08% max |
| Manganese |
0.75 - 1.00% |
2.00% max |
2.00% max |
| Phosphorus, max |
0.035% |
0.045% |
0.045% |
| Sulfur, max |
0.040% |
0.030% |
0.030% |
| Silicon |
0.15 - 0.35% |
1.00% max |
1.00% max |
| Chromium |
0.80 - 1.10% |
18.0 - 20.0% |
16.0 - 18.0% |
| Nickel |
absent |
8.0 - 11.0% |
10.0 - 14.0% |
| Molybdenum |
0.15 - 0.25% |
absent |
2.00 - 3.00% |
ASTM A193 Stud Bolts: Mechanical Properties
| ASTM A193 |
Size |
Min Tensile Strength (KSI) |
Min Yield Strength (KSI) |
Min Elongation (%) |
RA % min |
Max HBW |
Max HRC |
| ASTM A193 grade B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
321 |
35 |
| 2-5/8 - 4 |
115 |
95 |
16 |
50 |
| 4-1/8 - 7 |
100 |
75 |
18 |
50 |
| ASTM A193 grade B8 Class 1 |
All |
75 |
30 |
30 |
50 |
223 |
35 |
| ASTM A193 grade B8M Class 1 |
All |
75 |
30 |
30 |
50 |
223 |
96 |
| ASTM A193 grade B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
35 |
321 |
35 |
| 7/8 - 1 |
115 |
80 |
15 |
35 |
| 1-1/8 - 1-1/4 |
105 |
65 |
20 |
35 |
| 1-3/8 - 1-1/2 |
100 |
50 |
28 |
45 |
| ASTM A193 grade B8M Class 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
321 |
35 |
| 7/8 - 1 |
100 |
80 |
20 |
45 |
| 1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
| 1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
The material chosen for the threaded stud and the hex nuts should be compatible. Materials for bolting sets shall be selected based on the process's working temperatures, as shown in the table below:
| |
TEMPERATURE °C ( °F ) |
| STUD BOLTS MATERIALS |
MIN. |
MAX. |
| CARBON STEEL |
-29 (-20) |
300 (572) |
| A193 B7, L7 |
-73 (-100) |
400 (752) |
| A193 B6 |
0 (32) |
500 (932) |
| A193 B8 |
-200 (-325) |
575 (1067) |
| A193 B16 |
0 (32) |
520 (968) |
| A193 B17B |
-29 (-20) |
650 (1202) |
| A913 Inconel 718 |
0 (32) |
750 (1382) |
| A453 Gr. 660 |
-29 (20) |
538 (1000) |
ASTM A453 Stud Bolts for High-Temp. Service
ASTM A320 Stud Bolts for Low-Temp. Service
Stud Bolts' Coating
Stud bolts can be coated to increase the resistance to corrosion. The most common types of coatings for stud bolts are listed below:
- Electro zinc plating
- Electro cadmium plating
- Hot dip galvanizing
- PTFE Coating
- Phosphate coating
- Electroless nickel plating
- Zinc-nickel coating
- Aluminum coating
- Silver coating
- Zinc/Nickel by electrodeposition
- Xylan coating
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