What does 10.9 mean on bolt?
What does 10.9 mean on bolt?
Grade 10.9 Bolt is a high tensile bolt. These are made up of carbon steels and low boron steels. The material is heat treated by quenched and tempered methods. Navstar Steel is a leading supplier and manufacturer of the Grade 10.9 Bolt products in various dimensions and types.
What are Grade 10 bolts used for?
Class 10. This is a metric nut grading similar to the SAE grade 8 classification, which is used in conjunction with Class 10.9 bolts. This strength of nut is used in automotive, and structural industries, as well as in high temp applications.
What does 8.8 mean on bolt?
So, in English, a Property Class 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of that nominal tensile strength, so 640 MPa.
Are Grade 10 bolts stronger than Grade 8?
Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt. For most home and automotive applications, you won’t need anything more than a grade 8 bolt strength or metric class 10.9.
Is 8.8 high tensile?
High tensile steel bolts Grade 8.8 high tensile steel is often referred to as the structural grade for bolts. It is the most common form of high tensile material and is usually stocked in plain finish or zinc. It can be plated in many other coatings.
Is class 10.9 the same as Grade 8?
Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8. A low carbon steel for general use.
Is Grade 8 or 8.8 Stronger?
Table 1.
| Grade/Class | Strength |
|---|---|
| Grade 5 | Medium strength. |
| Grade 8 | High strength. |
| Metric Class 4 | Similar to Grade 2. |
| Metric Class 8.8 | Similar to Grade 5. |
Will 10.9 bolts rust?
Grade 10.9 fasteners are also used in applications that are prone to shocks. Since the material has resistant to shock, it won’t come undone, unlike some stainless steel fasteners. Usually, bolts produced in grade 10.9 are tempered and quenched….
| Properties | Grade 10.9 |
|---|---|
| Tensile Stress – Mpa | 832 min. |
Are 8.8 bolts high tensile?
How strong is a 8.8 bolt?
800
Bolt Grade Markings and Strength Chart
| Grade and Material | Mechanical Properties |
|---|---|
| Min. Tensile Strength (psi) | |
| Class 8.8 Medium carbon steel, quenched and tempered | 800 |
| 830 | |
| Class 10.9 Alloy steel, quenched and tempered | 1040 |
How much weight can a 8.8 bolt hold?
Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre.
Will grade 10.9 bolts rust?
Speaking of the corrosion resistance properties, while carbon steels are hard, their resistance to corrosion is almost little to none, unlike stainless steel hex head bolts, which depending on their grade tend to range between good to outstanding….
| Properties | Grade 10.9 |
|---|---|
| Hardness (HRC) | 32-39 |
| Tensile Stress – Mpa | 835 min. |
What grade are most automotive bolts?
Most automotive hardware is Grade 5 rated and is identified by three radial lines on the head of the bolt. They are made from a medium carbon steel that is quenched and tempered.
How strong is a metric 8.8 bolt?
Metric steel bolts, screws and studs – proof and tensile strength.
| Property Class | Size Range (mm) | Minimum Tensile Strength (106 Pa) |
|---|---|---|
| 8.8 | M1.6 – M36 | 830 |
| 9.8 | M1.6 – M16 | 900 |
| 10.9 | M5 – M36 | 1040 |
| 12.9 | M1.6 – M36 | 1220 |
Which is stronger grade 8 or grade 5 bolts?
There exists an often quoted myth, that Grade 5 bolts are better in shear than Grade 8 since they will bend before breaking. Not true. Shear strength of alloy steel is approximately 60% of its ultimate tensile strength. Reference to Table 1 shows that the yield strength of a Grade 8 bolt is higher than the ultimate strength of a Grade 5 bolt.
Are Grade 8 bolts more brittle than Grade 5?
We’ve all heard discussions about Grade 5 vs Grade 8 bolts, including the oft-espoused opinion that Grade 8 bolts are more brittle than Grade 5, so generally shouldn’t be used unless specified. However, when looking at objective evidence, Grade 8 always comes out much better for automotive use.
What are the different grades of bolts?
– SAE Bolt Grades—The standards for bolt strength grades in the U.S. – Metric Bolt Grades—Metric grades are set according to rules set by the ISO (International Standards Organization). – ASTM Bolt Grades—The ASTM grade standard is set by the American Society for Testing and Materials.
How to identify bolt grade?
Grade 2/Grade A Grade A and Grade 2 are the most common grades of zinc plated alloy steel.
