What is a grade 8.8 bolt?
Grade 8.8 Bolts are manufactured using medium carbon steel that has been quenched and tempered. Used in railroad equipment, motors, engines and processing equipment, grade 8.8 bolts exhibit good tensile strength and perform well in most environments.
What does 8.8 mean on the head of a 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.
Is Grade 8 and 8.8 the same?
Q: I’m specifying the strength of a metric fastener and need your help. Is Class 8.8 the same as Grade 8? A: The answer is no. Class 8.8 is not the same as Grade 8.
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 |
Are 8.8 bolts 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.
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.
How strong is an 8.8 bolt?
Is 8.8 high tensile?
What is class 8.8 steel?
What does 8.8 mean?
Bolt Grade Markings and Strength Chart
| Grade and Material | Nominal Size Range (inches) |
|---|---|
| Class 8.8 Medium carbon steel, quenched and tempered | All sizes below 16mm |
| 16mm – 72mm | |
| Class 10.9 Alloy steel, quenched and tempered | 5mm – 100mm |
How to identify grade 8 bolts?
You can identify Grade 8 bolts by the six evenly spaced radial lines on the head. These high strength bolts are made with a steel alloy containing an average of 18 percent chromium and 8 percent nickel, which makes them extremely strong but very brittle.
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.
Where to buy grade 8 bolts?
– Systems of Bolt Grades. Bolts are made of different grades of steel. – Bolt Grade Markings. The most common grading system used for bolts in the U.S. – SAE Bolt Grades. This bolt is an ASTM specification bolt that’s readily available in many home improvement and automotive stores. – Metric Bolt Grades.
What are Grade 8 bolts?
Grade 8 Bolts and fasteners are comprised of carbon-alloy steel, heat treated in a carbon controlled atmosphere and are generally the most durable and reliable fastener. Grade 8 bolts have the highest ratings with tensile strength of 150,000 psi. Grade 8 bolts are used marine, military, aerospace, off-road vehicle markets and related mechanical applications where stress and strong load bearing pressure is required.