F436

Hardened Steel Washers

F436

TABLE 1 Chemical Requirements

Element

Composition %,
Type 1 Type 3 *
Phosphorus max 0.050 0.050
Sulfur max 0.060 0.055
Silicon: 0.13-0.37
Copper: 0.22-0.48
Nickel: 0.22-0.48
Chromium: 0.42-0.68

* Weathering steel washers can also be manufactured fom any of the steels listed in table 2 of Specification A 325

  Circular Chipped Circular and Extra Thick Clipped
      Thickness (T) in. Extra thick Minimum Edge
Bolt Size in. Nominal Outside Diameter (OD), in. Nominal Inside Diameter (ID), in. Min Max Min Max Distance (E ) ᵃ, in.
1/4 0.625 0.281 0.051 0.080 0.219
5/16 0.688 0.500 0.051 0.080 0.094
3/8 0.813 0.406 0.051 0.080 0.344
7/16 0.922 0.469 0.051 0.080 0.406
1/2 1.063 0.531 0.097 0.177 0.305 0.375 0.438
5/8 1.313 0.688 0.122 0.177 0.305 0.375 0.563
3/4 1.469 0.813 0.122 0.177 0.305 0.375 0.656
7/8 1.750 0.938 0.136 0.177 0.305 0.375 0.781
1 2.000 1.125 0.136 0.177 0.305 0.375 0.875
11/2 2.250 1.250 0.136 0.177 0.305 0.375 1.000
11/4 2.500 1.375 0.136 0.177 0.305 0.375 1.094
1% 2.750 1.500 0.136 0.177 0.305 0.375 1.219
11/2 3.000 1.625 0.136 0.177 0.305 0.375 1.313
13/4 3.375 1.875 0.178 B 0.28 B 0.305 0.375 1.531
2 3.750 2.125 0.178 B 0.28 B 0.305 0.375 1.750
21/4 4.000 2.375 0.24c 0.34c 0.305 0.375 2.000
21/2 4.500 2.625 0.24c 0.34c 0.313 0.375 2.188
23/4 5.000 2.875 0.24c 0.34c 0.313 0.375 2.406
3 5.500 3.125 0.24c 0.34c 0.313 0.375 2.625
31/4 6.000 3.375 0.24c 0.34c 0.313 0.375 2.875
31/2 6.500 3.625 0.24c 0.34c 0.313 0.375 3.063
33/4 7.000 3.875 0.24c 0.34c 0.313 0.375 3.313
4 7.500 4.125 0.24c 0.34c 0.313 0.375 3.500

A Clipped edge E shall be not closer than 7/8 of the bolt diameter from the center of the washer.

B 3A 6 in. nominal.

c 1/4 in. nominal.

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