From the table at right, for a strength class of 10.9 and a maximum allowable load of 200 kgf, the suitable bolt is a 318［kgf］M8. Therefore we select a 10 mm MSB10 with a M8 thread section. When the bolt is subjected to shear load, also use a dowel pin.
How much weight can a M8 bolt take?
| Size | Grade 8.8 | Grade 10.9 |
|---|---|---|
| M8 | 2,120kg | 3,040kg |
| M10 | 3,370kg | 4,810kg |
| M12 | 4,890kg | 7,000kg |
| M16 | 9,100kg | 13,000kg |
How much force can a bolt take?
Steel bolts are graded according to newtons per millimeter squared for bolt tensile strength as compared to yield strength. For example, a steel bolt with a rating of 5.5 will provide roughly 500 newtons/mm2 of bolt tensile strength and approximately 400 newtons/mm2 of yield strength.
How much weight can a Grade 8 bolt support?
The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking.
How much shear force can a bolt hold?
The Industrial Fastener Institute (Inch Fastener Standards, 7th ed. 2003. B-8) states that shear strength is approximately 60% of the minimum tensile strength. “As an empirical guide, shear strengths of carbon steel fasteners may be assumed to be approximately 60 percent of their specified minimum tensile strengths.
How strong is a Class 8.8 bolt?
Bolt Grade Markings and Strength Chart
| Grade and Material | Mechanical Properties |
|---|---|
| Min. Yield Strength (psi) | |
| Class 8.8 Medium carbon steel, quenched and tempered | 640 |
| 660 | |
| Class 10.9 Alloy steel, quenched and tempered | 940 |
Is a 8.8 bolt strong?
Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5. Zinc plated for moderate corrosion resistance.
How much torque can a bolt take?
US Recommended Bolt Torque
| Size | Recommended Torque | |
|---|---|---|
| Grade 2 | 18-8 S/S | |
| 5/8″ | 73 | 104 |
| 3/4″ | 125 | 124 |
| 7/8“ | 129 | 193 |
What is the strongest bolts you can buy?
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.
How much weight can an M3 bolt hold?
Minimum Ultimate Tensile Load
| Thread d (mm) | Pitch P (mm) | Property Class |
|---|---|---|
| 9.8 | ||
| M3 | 0.50 | 4530 |
| M3.5 | 0.60 | 6100 |
| M4 | 0.70 | 7900 |
How much torque does it take to break a grade 8 bolt?
SAE Grade-8 bolt snapped @ 135ft/lbs.
What is the shear strength of a grade 8 bolt?
Shear strength of a grade 8 bolt in good condition is 91,000 psi.
What is the hardest grade bolt?
Grade 8
Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head marking, although sometimes a manufacturer’s mark is present. This grade of bolt is made from low or medium carbon steel.
What grade bolt is best for shear strength?
Grade 8 bolts exhibit greater tensile, yield, and shear strength as well as greater fatigue resistance and, just as important, are capable of greater torque specs and therefore much greater pre-load and clamping strength.
What is clamping force for bolts?
Preload is the tension created in a fastener when it is tightened. This tensile force in the boltcreates a compressive force in the bolted joint known as clamp force. For practical purposes, theclamp force in an unloaded bolted joint is assumed to be equal and opposite of the preload.
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. |
What does 8.8 mean on a metric bolt?
Bolt Head Grade/Strength Identifiers
| US (English) Bolts | ||
|---|---|---|
| Metric Bolts | ||
| Class and Material | Nominal Size Range (mm) | Min. Tensile Strength (MPa) |
| Class 8.8 – Medium carbon steel, quenched and tempered | Up to 16mm | 800 |
| 16-72mm | 830 |
Are stainless bolts stronger than Grade 8?
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). A grade 8 bolt has a stronger rating with a PSI of 150,000.
What steel is used for 8.8 bolts?
medium carbon steel
The specification Bs 3692 Grade 8.8 standard fasteners are manufactured using medium carbon steel. This medium carbon steel has been treated to heat by both quenching and tempering.
What is the yield strength of grade m8 8 bolt?
ASME SA324 8.8 Stainless Steel Bolts Sizes
| Class and Material | Nominal Size Range (mm) | Mechanical Properties |
|---|---|---|
| Min. Yield Strength (MPa) | ||
| Class 8.8 Medium carbon steel, quenched and tempered | All sizes below 16mm | 640 |
| 16mm – 72mm | 660 |
What’s the difference between 4.6 and 8.8 bolts?
Category 4.6/S refers to commercial bolts of Property Class 4.6 conforming to AS 1111.1 tightened using a standard wrench to a ‘snug-tight’ condition. Category 8.8/S refers to any bolt of Property Class 8.8, tightened using a standard wrench to a ‘snug- tight’ condition in the same way as for category 4.6/S.