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 a Class 8.8 bolt the same as Grade 8?
In terms of strength, 8.8 is equivalent to Grade 5, 10.9 is equivalent to grade 8. There are also 12.9 metric bolts, which are a little stronger than 10.9, and are a higher alloy steel.
What size is a 8.8 bolt?
The diameter of the 8.8 Jh Bolt range from 20mm to 100mm. They can come with different finishes as well. The zinc plated, hot dip galvanized and plain finishes are available for different application needs. The 8.8 Metric Bolt is one of the standards adopted.
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 Grade 8 the strongest bolt?
A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards.
What is the difference between 4.8 and 8.8 bolts?
The strength grades 8.8 and 10.9 refer to the shear stress grades 8.8gpa and 10.9gpa. 8.8 nominal tensile strength 800N / mm2; nominal yield strength 640n / mm2. For example: grade 4.8, the tensile strength of the bolt is 400MPa; the yield strength is 400 * 8 / 10 = 320MPa.
What grade is a metric 8.8 bolt?
Metric Bolt Grades
Class 8.8: Head Marking: 8.8. Material: Medium carbon steel, quenched and tempered.
What are Grade 8 bolts used for?
Grade 8 fasteners are considered hi-strength / high-tensile fasteners and are used in many highly industrial applications such as machinery, valves, pumps, vessels, motors, tractors, and even tanks… Although it may seem like a bolt is a bolt, there are significant differences in how each bolt is manufactured.
What grade is a stainless steel bolt?
Stainless Steel Grades & Strength
Stainless commonly comes in grades 18.8 (304) or T316. Stainless steel bolts are rated for corrosion resistance. Bolt strength is rated in PSI (pounds per square inch). A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI).
How hard is a Class 8.8 bolt?
In a partially or fully annealed condition, the tensile strength of the 8.8 Hex Bolt is around 420 Mpa for low carbon steel and 500 Mpa for medium carbon steel, its core hardness in terms of Rockwell lies between B71 – 95. The surface hardness of the 8.8 Metric Bolt can be increased through carburizing.
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.
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