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ASTM A320 Grade B8F Stud Bolts | UNS S30300 Specifications
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  • ASTM A320 Grade B8F Stud Bolts

    • ASTM A320 Grade B8F Stud Bolts

    303S31, BS2346, 1.4305, 303, S30300, X8CRNIS18-9

    ASTM A320 Grade B8F Bolts are manufactured from 303 Stainless Steel in accordance with ASTM A320 specification. Torqbolt is a prominent A320 gr B8F bolt supplier in India.

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    ASTM A320 Grade B8F Stud Bolts Properties

    ASTM A320 Grade B8F Stud Bolts Chemical Requirements

    Austenitic Steels

    Grade Symbol UNS Designation C, max Mn, max P, max S, max Si, max Ni Cr Mo Se Ti N Nb E + Ta
    ASTM A320 B8F S 30300(303) Range,% 0.15 2.00 0.20 00.15, min 1.00 8.0 - 10.0 17.0- 19.0 ... ... ... ... ...
    Product Variation, % Over or Under 0.01 over 0.04 over 0.010 over 0.20 0.05 over 0.10 0.20 ... ... ... ... ...
    ASTM A320 B8F S 30300(303) Range,% 0.01 over 0.04 over 0.010 over 0.02 0.05 over 0.1 0.2 . . . . . . . . . ... ...
    Product Variation, % Over or Under 0.15 2 0.2 0.06, max 1 8.0-10.0 17.0-19.0 . . . 0.15-0.35 . . . ... ...

    ASTM A320 Grade B8F Stud Bolts Mechanical Requirements

    Austenitic Steels

    Grade and Class Diameter, in. [mm] Heat Treatment Minimum Tempering Temperature, °F [°C] Tensile Strength, min, ksi [MPa] Yield Strength, min, ksi [MPa] (0.2 % offset) Elongation in 2 in. or 50 mm, min, % Reduction of Area, min, % Hardness, max
    ASTM A320 B8F : Class 1 All diameters carbide solution treated ... 75 [515] 30 [205] 30 50 223 HBWDor 96 HRB
    B8F : Class 2 3/4 [20] and under carbide solution treated and strain hardened ... 125 [860] 100 [690] 12 35 321 HBW or 35 HRC
    over 3/4 to 1 [20 to 25], incl ... 115 [795] 80 [550] 15 30 321 HBW or 35 HRC
    over 1 to 11/4 [25 to 32], incl ... 105 [725] 65 [450] 20 35 321 HBW or 35 HRC
    over 11/4 to 11/2 [32 to 40], inclA ... 100 [690] 50 [345] 28 45 321 HBW or 35 HRC

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