Fatigue-Proof® Properties

ASTM A311 Class B

Tensile Strength

*140,000 psi

Yield Strength (.2% offset)

125,000 psi

Machining Characteristics

80% of 1212

Elongation

5% Min.

Reduction of Area

15% Min.

Rockwell C Hardness

*30 Min.

Brinell Hardness

*280 Min.

Micro-Structure

Pearlite & Ferrite

Size Range

Rounds 1/4″ through 3 1/2″

Hexagons 1/4″ through 1 1/2″

Length

11′ / 13′

Any Custom Lengths

Finish

Standard “As Drawn” finish is smooth, accurate, and dark in color

Ground & Polished finish provides close tolerances, high accuracies and bright surface.

Rounds Only

Example of Use

Parts you are now heat treating from Rc23 to Rc30. A uniform material which provides exceptional quality for:

Production, Maintenance, Special Machine Parts

Tolerances

(Tolerances, in decimals of an inch, provide for undersize variation only)

Rounds:

5/16″ to 7/16″ incl.

7/16″ to 1 1/2″ incl.

Over 1 1/2″ to 3 1/2″ incl.

0.004″

0.005″

0.006″

Hexagons:

1/4″ to 3/8″

3/8″ to less than 7/16″

7/16″ to 1 1/2″ incl.

0.004″

0.005″

0.006″

* In the event of disagreement between hardness and tensile strength, the tensile strength shall govern that.