ASTM A193 A320 A325 Alloy Steel Fasteners Bolt Nut Washer For High Temperature

ASTM A193 A320 A325 Alloy steel fasteners bolt nut washer for high temperature

1. Most commonly steel used for fasteners:

Fasteners are often made of steel, but there are many different types of steel. Here are the steels most commonly used for fasteners:

Alloy steels: Steels alloyed with molybdenum, nickel, and chromium (AISI 4037, 4130, 8630) are best if strength is required. These steels also have good cold-forming properties when annealed and can be heat-treated for the best combination of strength, toughness, and shock resistance.

Carbon steels: Fine-grain, fully killed (i.e., completely deoxidized) basic steel with no alloying agent. Low-carbon steels have from 0.06 to 0.22% carbon content (AISI 1008, 1010, 1018, and 1022) and exhibit good ductility for cold-forming. Medium-carbon steels contain 0.30 to 0.50% carbon content (AISI 1038, 1045) and are stronger but less ductile. These steels respond well to quench and temper. High-carbon steels contain 0.50% or more carbon (AISI 1066, 1095). They are difficult to cold-form unless annealed. They do, however, have high strength and can be heat-treated.

2. ASTM A193 A320 A325 Alloy steel fasteners dimension:

3. Common surface treatment for carbon steel and alloy steel grade:

• Nature
• Black
• Hot galvanizing
• Cold galvanizing/ electrogalvanizing
• Cadium plate
• Zinc-Nickel plate
• PTFE coat