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China Factory Suppliers of Torsional Shear Bolts for Steel Structures - High-Strength Grade 10.9 Steel
Factory Manufacture Various Bolt Truck Parts Round Head Torsional Shear Bolts
| Place of Origin | Hebei, China |
| Product name | Torsional shear bolts for steel structure |
| Material | Grade 10.9 steel |
| Size | Length 4CM/5CM/6CM/7CM/8CM/9CM/10CM Can be customized |
| Characteristic | Used for bridges and highways |
Bolt Marks and Performance Grades
(1) Logo. Hexagon bolts and screws (thread diameter ≥5mm). A convex or concave mark on the top of the head or a concave mark on the side of the head is required. Including performance grade, factory standard. Carbon steel: Strength grade marking code consists of two numbers separated by “·”. The numerical part before “·” in the marking code indicates the nominal tensile strength. For example, “4″ in grade 4.8 means 1/100 of the nominal tensile strength of 400N/MM2. The meaning of “·” and the digital part after the dot in the marking code indicates the yield ratio, that is, the ratio of the nominal yield point or the nominal yield strength to the nominal tensile strength. For example, the yield point of grade 4.8 products is 320 N/mm2. Stainless steel product strength grade mark is composed of two parts separated by “-”. The symbol before “-” indicates the material. For example, A2 and A4 indicate the strength after a -, for example, A2-70
(2) Grade. Carbon steel: Metric bolt mechanical performance grade can be divided into: 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9 a total of 10 performance grades. Stainless steel is divided into 60,70,80(austenite); 50,70,80,110(martensite); 45,60 (ferrite) class iii.
Frequently Asked Questions (FAQ)
What are torsional shear bolts primarily used for?
Torsional shear bolts are high-strength fasteners specifically designed for steel structures, commonly utilized in heavy-duty engineering projects such as bridges and highways.
What material and performance grade are these truck part bolts?
These round head torsional shear bolts are manufactured from high-quality Grade 10.9 steel, ensuring high tensile strength and durability for demanding structural applications.
What sizes of torsional shear bolts are available?
Standard lengths include 4CM, 5CM, 6CM, 7CM, 8CM, 9CM, and 10CM. Custom sizes can also be manufactured according to your specific project requirements.
How do you read the strength grade marking on carbon steel bolts?
The marking consists of two numbers separated by a dot. The number before the dot represents 1/100 of the nominal tensile strength (e.g., '4' in 4.8 means 400N/mm²). The number after the dot indicates the yield ratio, which represents the ratio of the yield strength to the nominal tensile strength.
What are the different mechanical performance grades for metric carbon steel bolts?
Metric carbon steel bolts are classified into 10 performance grades: 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, and 12.9.
How are stainless steel bolt strength grades marked and classified?
Stainless steel grades use a two-part code separated by a hyphen (e.g., A2-70). The symbol before the hyphen indicates the material group, and the number after indicates the strength. They are divided into three main classes: austenite (60, 70, 80), martensite (50, 70, 80, 110), and ferrite (45, 60).