Is 10.9 stronger than Grade 8?

Grade 8 is an SAE designation. 10.9 is a metric designation. But the two systems yield the same holding strength.

Is Grade 10.9 the same as Grade 8?

Class 10.9

This is a metric grading similar to the SAE grade 8 classification, which is used in automotive, and structural industries, as well as in high temp applications. Its strength is near the high end of the grade scale, although there are higher grades and strengths for more specialized fasteners.

What bolt is stronger than Grade 8?

Grade 9 bolts are ideal for heavy-duty applications and are also often used in heavy machinery such as bulldozers. Not only are these bolts considerably stronger than they're grade 8 counterparts, but they are also considerably more resistant to corrosive elements as they are made with yellow zinc chromate.

How strong is a 10.9 bolt?

Grade 10.9 bolts: As these bolts are most often used in the automotive industry, they are also referred to as 'car bolts'. They are made of boron or carbon steel and have high tensile strength (1040 MPa).

Is Grade 8 or 10 bolt stronger?

The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. No matter the system used, the higher number means the stronger the bolt.

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What does 10.9 mean on a bolt?

Property Class 10.9 bolts and screws have a minimum tensile strength of 1040 MPa for all sizes. As you can see, they're slightly stronger than the nominal value in the property class designation. Property Class 10.9 bolts are considered high-strength parts. They're in the neighborhood of SAE J429 Grade 8 parts.

When not to use Grade 8 bolts?

Compatibility: Grade 8 fasteners may not be compatible with all materials. For example, if they are used to fasten soft materials such as aluminum or brass, the threads may strip or the fasteners may fail due to the lack of sufficient gripping power.

Are 10.9 bolts brittle?

Hydrogen embrittlement of high strength bolts of property classes 10.9 and 12.9 is a change in material behavior by atomic hydrogen which can lead to brittle fracture under tensile load caused by the tightening procedure or in service conditions.

Why are 10.9 bolts black?

Hydrogen embrittlement is likely to occur after electro-galvanizing after tightening, so bolts above 10.9 are usually not galvanized, and the surface treatment is usually blackened or hot-dip galvanized.

Is 12.9 better than Grade 8?

Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

What is the strongest grade bolt you can buy?

Commercial-grade 8 bolts are the strongest option available. They're made from medium carbon alloy steel and have markings that include six raised dashes. The psi of the bolt is 150,000, meaning that it can withstand great deals of pressure because of the way it was quenched and tempered.

Will a Grade 8 bolt break?

Grade 8 bolts are designated as a 150 ksi. This means its tensile strength or the resistance it has before it is subject to breaking under tension is equal to 150,000 lbs. per square inch. In comparison, a Grade 5 bolt is weaker as its tensile is 120 ksi, placing it at 120,000 lbs.

Is 10.9 hardened?

Hardened Class 10.9 Metric Hex Bolts are a high strength, high tensile fastening solution available in coarse, fine and extra fine thread.

What is the strongest bolt?

BUMAX® Ultra has proven itself as the world's strongest bolt – in various highly-demanding critical fastener applications around the world where standard fasteners are simply inadequate.

Do Grade 10.9 bolts rust?

These Carbon Steel 10.9 Bolts are also resistant to corrosion and therefore are used in a wide range of industrial applications such as for construction. These fasteners also have excellent finishing and are easy to install, and are also robust.

Is Grade 8 or 8.8 stronger?

Synopsis: The similarity in names is purely coincidental and the Metric Class 8.8 is not as strong as the Inch Grade 8. As you can see from the table below, a metric Class 8.8 is the equivalent of a Grade 5, not a Grade 8.

What is the price of 10.9 grade bolt?

Mild Steel High Tensile Bolts 10.9 Grade, For Industrial, 100 at Rs 27/piece in Mumbai.

Can you weld Grade 10.9 bolts?

The problem is, the base medium carbon or alloy steel used to make high strength bolts is technically not weldable due to high levels of carbon and manganese. This could perhaps be overcome with special welding procedures, but the bottom line is that it would be best to avoid welding high strength bolts altogether.

Is Class 10.9 better than Grade 8 bolts?

They are very similar. Grade 8 is an SAE designation. 10.9 is a metric designation. But the two systems yield the same holding strength.

How much torque can a 10.9 bolt hold?

Did you know an M12 grade 10.9 bolt, a common automotive fastener, has an ultimate tensile strength of nearly 20,000 pounds? According to the chart above, the recommended tightening torque for an M12 bolt with a 10.9 bolt grade would be 114.0 Nm.

What's the hardest grade bolt?

Steel fasteners are commonly available in four grades that are broken into the following categories: 2, 5, 8 and 18-8 stainless (commonly referred to simply as alloy steel). Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest.

Why are Grade 8 bolts yellow?

Steel fasteners are commonly available in 4 grades: Grade 2, Grade 5, Grade 8, and Alloy Steel. Many other grades exist but are used far less often. Grade 2, 5, and 8 are usually plated with a slightly blue-ish or yellow zinc coating, or are galvanized, to resist corrosion.

What grade bolt has 6 lines?

These six radial lines indicate that the bolt is a Grade 8 bolt.