Question: Is Grade 8 Or 10.9 Stronger?

What grade bolt is strongest?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi..

What is a Class 8 nut?

Class 8. This is a metric nut grading similar to the SAE grade 5 classification, which is used in conjunction with Class 8.8 bolts. This is a medium strength nut.

Is Grade 8 or 12.9 stronger?

Inch fasteners—those commonly used in North America—will have a grade or ASTM rating. Property class (often just “class”) specifies metric fasteners….Table 1.Grade/ClassStrengthMetric Class 10.9Similar to Grade 8.Metric Class 12.9The highest metric class for strength, it exceeds Grade 8.12 more rows

What is the metric equivalent of Grade 8?

Approximate Equivalency Chart Metric/US Roughly Equivalent US Bolt MaterialsMetric Nut ClassSAE J429Normally UsedGrades8.8859.895+10.910or 12812.910or 12.3 more rows

Can Grade 8 bolts be reused?

Mechanically, bolts may be reused provided the bolt never exceeded its yield point: a simple enough definition, but one that is more complicated than it may appear. This is because it is nearly impossible to verify if a bolt has ever been tensioned past the yield point.

Will Grade 8 bolts rust?

Grade 8 bolts have 6 evenly spaced radial lines on the head.” Unlike stainless steel, which is highly resistant to corrosion, steel, however reinforced, will oxidize over time and rust. Grade 8 bolts that are not galvanized or plated with yellow zinc, however, are cheaper.

What grade is a 12.9 bolt?

The minimum ultimate tensile strength of the Grade 12.9 Metric Hex Head Bolts is about 1242 Mpa or 180,000 PSI, making them the highest grade of bolts produced.In fact, the Grade 12.9 Nuts is known for their high tensile strength.

Are titanium bolts stronger than steel?

Titanium bolts can be as strong as mild steel or stainless steel bolts. Titanium bolts are not as strong as high-tensile steel bolts.

What grade bolt has the highest shear strength?

They are commonly used at high stress points in connecting devices.12.9 Bolts. A 12.9 bolt is one of the highest grade of bolts produced. … 12.9 Shear Strength. The minimum tensile strength of a 12.9 bolt is 1220 MPa.

Is Grade 8 the strongest bolt?

Grade 8 / Grade G Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head.

What is class 12.9 Steel?

Grade 12.9 Bolt is a high tensile bolt that has a diameter of 12.9 mm and the lengths vary from 20mm to 200mm based on the application requirement. … There are studs, hex bolts, U bolts, T bolts and many other types in this grade.

What is the difference between a 10.9 and 12.9 Bolt?

12.9 grade steel has 120% of the tensile strength of 10.9 grade steel. The “12” prefix indicates a tensile strength of X100 N/mm^2 and the “9” suffix indicates a multiplier. Both 12.9 and 10.9 have the same multiplier, so the comparison is straightforward: 12 to 10.

Is a Grade 10 bolt stronger than a Grade 8 bolt?

There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. … No matter the system used to grade the bolts, the higher the 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.

How strong is a grade 10.9 bolt?

The yield strength of the Class 10.9 Bolt is 940 Mpa and the tensile strength of the Grade 10.9 Nuts is 1040 MPa.

What is the hardest bolt you can buy?

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.