ASTM A540 Grade B21

Size In Ready Stock

• ASME SA540 Grade B21 Screw = M1.2 To M48
• ASTM A540 Grade B21 Bolts : M1.2 To M120
• A540 Grade B21 Washer = M2 To M24
• Grade B21 Stud = M4 To M100
• SA 540 Grade B21 Nut = M2 To M80

A540 Grade B21 Bolts Head Types

• Button head
• Hex head
• Truss head
• Round head
• Flat head

Grade B21 Bolts Neck Type

• Square Neck
• Knurled Neck
• Hex Neck
• Triangular Neck

A540 Grade B21 Bolts Threads Types

• UNF
• CBSF
• UN
• BSW

Head Drive

• Phillips
• Phillips/Slot
• Six-Lobe
• Slotted

Ends Types

• Sheared
• Flat or Saw cut
• Chamfered
• Rounded

ASTM A540 B21 Threaded Rod

• Threads : Both Side, Left and Right Hand
• Condition : Cold Drawn or Threading

ASTM A540 Grade B21 Stud Bolts

• Threads : Double End, Fully or Fine Threaded
• End Types : Rounded, Flat and Saw Cut

A540M Grade B21 Screw

• Head Shape : Pan, Round, Button
• Threads Pitch : Coarse and Fine

SA 540 Grade B21 Class 1 Washers

• Thickness : 0.002" to ½"
• Forms : A, D, C, G, B, E

Process Method

• Cold forging
• Hot forging
• CNC Machine

Advantages

• Good Stress Corrosion Resistance
• Suitability for Nuclear Applications
• Good Chemical Composition

Testing

• Dimensional Inspection
• Hardness Testing
• Ferritiscope Testing

Uses

• Nuclear Power Plants
• Heavy Engineering
• Oil and Gas

Packaging Types

• Carton Box
• Wooden Cases
• Custom

Origin of Raw Material

• Janpanese
• European
• German

• Mn (Manganese) = 0.45 - 0.70%
• P (Phosphorus) = 0.025% (Max.)
• C (Carbon) = 0.35 - 0.44%
• Si (Silicon) = 0.15 - 0.35%

• Mo (Molybdenum) = 0.50 - 0.65%
• V (Vanadium) = 0.25 - 0.35%
• S (Sulfur) = 0.025% (Max.)
• Cr (Chromium) = 0.80 - 1.15%