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    2. ASTM F436 ASTM F436 Type 1 Washers

    ASTM F436/F436M Type 1 Washer

    ASTM F436/F436M Type 1 washers are heat-treated carbon steel washers intended for general-purpose mechanical and structural use. They are manufactured to meet strict chemical, mechanical, and dimensional requirements and are widely used with bolts, nuts, and studs to distribute load, prevent surface damage, and improve joint performance in demanding applications.

    ASTM F436/F436M Type 1 Chemical Requirements

    Element Analysis Composition, %
    Type 1
     P, max Heat analysis  0.040
     Product analysis   0.050
     S, max Heat analysis  0.050 
     Product analysis  0.060
    • (A) When providing Weathering Steels to a calculated corrosion index use the Legault-Leckie formula from Guide G101.  
    • I = 26.01 (% Cu) + 3.88( % Ni) + 1.20 (% Cr) + 1.49 (% Si) + 17.28 (% P) - 7.29 (% Cu) - 9.10( % Ni) (% P)- 33.39 (%Cu)2
    • (B) Weathering steel washers may also be manufactured from any of the steels listed in Table 2 of Specification A588/A588M and F3125.
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