Mechanical Properties of Metric Fasteners

 

MECHANICAL PROPERTIES OF METRIC FASTENERS

Property Class   Designation

Nominal Size of   Product

Material and Treatment

Mechanical Requirements

Property Class   Ident. Marking

Proof Load   Stress, MPa

Tensile Yield   Strength, MPa, Min.

Tensile Ultimate   Strength, MPa, Min.

Prod. Hardness,   Rockwell

Surface, Max.

Core

Min.

Max.

4.6

M5-M100

low or medium carbon steel

225

240

400

--

B67

B95

4.6

4.8

M1.6-M16

low or medium carbon steel, fully or partially annealed

310

340

420

--

B71

B95

4.8

5.8

M5-M24

low or medium carbon steel, cold worked

380

420

520

--

B82

B95

5.8

8.8

M16-M72

medium carbon steel, quenched and tempered

600

660

830

30N56

C23

C34

8.8

A325M Type 1

M16-M36

A325M 8S

8.8

M16-M36

low carbon boron steel, quenched and tempered

600

660

830

30N56

C23

C34

8.8

A325M Type 2

A325M 8S

A325M Type 3

M16-M36

atmospheric corrosion resistant steel, quenched and tempered

600

660

830

30N56

C23

C34

A325M 8S3

9.8

M1.6-M16

medium carbon steel, quenched and tempered

650

720

900

30N58

C27

C36

9.8

9.8

M1.6-M16

low carbon boron steel, quenched and tempered

650

720

900

30N58

C27

C36

9.8

10.9

M5-M20

medium carbon steel, quenched and tempered

830

940

1040

30N59

C33

C39

10.9

10.9

M5-M100

medium carbon alloy steel, quenched and tempered

830

940

1040

30N59

C33

C39

10.9

A490M Type 1

M12-M36

A490M 10S

10.9

M5-M36

low carbon boron steel, quenched and tempered

830

940

1040

30N59

C33

C39

10.9

A490M Type 2

M12-M36

A490M 10S

A490M Type 3

M12-M36

atmospheric corrosion resistant steel, quenched and tempered

830

940

1040

30N59

C33

C39

A490M 10S3

12.9

M1.6-M100

alloy steel, quenched and tempered

970

1100

1220

30N63

C38

C44

12.9

 

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