Scope

ASTM F436 covers the chemical and mechanical requirements for hardened washers in diameters ranging from 1/4″ to 4″ inclusive. These heat treated washers are for general purpose and structural use and are suitable for use with A325 and A490 structural bolts. Additionally, they are used with bolts per A449, A354, A193, A320, F1554 and whenever specified.

F436 Types

Type 1

Type 3

Carbon Steel

Weathering Steel

F436 Styles

Circular

Beveled

Clipped

Round SAE pattern

Beveled Slope 2 in 12 or 9.5 degrees for use with American standard beams

Circular or Beveled

Sizes 1/4″ through 4″

Sizes 1/2″ through 1-1/2″

Sizes 1/2″ through 1-1/2″ beveled, 1/4″ through 4″ circular

Beveled F436 washers are normally not available above 1″. Clipped bevel washers are only usually available as specials.

F436 Mechanical Properties

 

Plain Finish

Hot Dip Galvanized

Rockwell Hardness 38 to 45 HRC

Rockwell Hardness 26 to 45 HRC

F436 Chemical Requirements

Element

Type 1

Type 3

Phosphorous, max

0.040%

0.040%

Sulfur, max

0.050%

0.050%

Silicon

-

0.15 – 0.35%

Chromium

-

0.45 – 0.65%

Nickel

-

0.25 – 0.45%

Copper

-

0.25 – 0.45%

Weathering steel washer may also be made from any of the steels listed in Table 2 of A325.