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.
||Round SAE pattern
||Sizes 1/4" through 4"
||Beveled Slope 2 in 12 or 9.5 degrees for use with American standard beams
||Sizes 1/2" through 1-1/2"
||Circular or Beveled
||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
||Hot Dip Galvanized
|Rockwell Hardness 38 to 45 HRC
||Rockwell Hardness 26 to 45 HRC
F436 Chemical Requirements
||0.15 - 0.35%
||0.45 - 0.65%
||0.25 - 0.45%
||0.25 - 0.45%
|Weathering steel washer may also be made from any of the steels listed in Table 2 of A325.
Washers provide a smooth bearing surface and are used under the head of a bolt and/or a nut. The chemical, mechanical, and dimensional requirements for hardened washers are covered under the ASTM specification F436. These washers are through hardened or carburized to add strength, but are physically smaller than a standard F844 flat washer. They are the recommended washer for any fastener other than a low carbon steel bolt.
Materials and Chemical compstition
|CHEMICAL COMPOSI %
50KG/ IRON DRUM,12 IRON DRUMS/PALLET
QBH SMALL PACKING
Packing in small boxes according to customer’s requirements
Packing in plastic bag according to customer’s requirements
QBH PALLET TYPE
SOLID WOOD FUMIGATION PALLET
THREE SPLINT PALLET
The advantages of QBH
- QBH brand sales to the main quality assurance.
- Years of export trade management, excellent service, word-of-mouth guarantee.
- By working with TUV,escort for quality.
- Customization of non-standard parts can be made according to customer's requirements and drawings.
- For quality customers,we can provide a certain credit period.