What is the hardness of 10 9 bolt?

What does 10.9 hardness of nut and bolt mean?

Grade 10.9 Bolt is a high tensile bolt. These are made up of carbon steels and low boron steels. The material is heat treated by quenched and tempered methods. … The bolts are produced in a way that they have high tensile strength.

How strong is a Class 10.9 bolt?

Used in automotive applications and for bolting large and forged parts, metric 10.9 bolts exhibit high tensile strength and good wear resistance. Our metric grade 10.9 bolts meet ASTM A324 grade BD and SAE J429, grade 8 standards. The yield strength of the bolts is 940 and the tensile strength is 1040 MPa.

What grade is a 10.9 bolt?

Class 10.9 is similar to grade 8. A low carbon steel for general use.

Is there a grade 10 bolt?

Class 10. This is a metric nut grading similar to the SAE grade 8 classification, which is used in conjunction with Class 10.9 bolts. This strength of nut is used in automotive, and structural industries, as well as in high temp applications.

Is a 10.9 bolt metric?

Bolt Grade Markings

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The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9.

How much weight can a 10.9 bolt hold?

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.

What is the strongest grade of bolt?

A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI.

How can you tell if a bolt is metric hardness?

How Grades are Designated. Strength Grades for metric fasteners are designated by a symbol comprised of 2 numbers, separated by a decimal. For example, 4.6 and 8.8. The first number represents 1/100 of the nominal tensile strength in N/mm^2.

What does 10.9 mean on a bolt?

For the 10.9 bolt, the 9 tells the user that the yield strength of the bolt is approximately 90% of the first number: 1,000 MPa. Thus, the 10.9 bolt has an approximate yield strength of 900 MPa (940 MPa by specification). Two other common symbols that are included on metric parts are the “S” and the 3 designations.

What is 8.8 Hardness?

Mechanical properties

Grade, material & condition Nominal thread diameter size range [mm] Core hardness [Rockwell]
Class 5.8 Low or medium carbon steel; cold worked 5–24 B82–95
Class 8.8 Medium carbon steel; quench and tempered Under 16 (inc.) C18-31
17–72 C23–34
Class 8.8 low carbon Low carbon boron steel; quench and tempered

What size is a 10.9 metric bolt?

Metric hex bolts, Zinc plated class 10.9 steel, 10mm x 1.5mm x 70mm.

How strong is a Grade A bolt?

Grades of Bolts – Bolt Grade Markings & Bolt Strength Chart

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Bolt Grade Markings & Strength Chart – Metric Steel Bolts
Head Marking Grade/Specification Tensile Strength min (MPa)
Class 10.9 1040 (150,000 psi)
Class 12.9 1220 (176,000 psi)
Usually stamped A-2 or A-4 A2 & A4 Stainless 500 Min 700 Typical