ASTM A325 Screws

ASTM A325 Screws generally refers to cap screws, machine screws, or other specialized external threaded fasteners manufactured using the ASTM A325 structural material. A325 mandates high-strength, quenched and tempered medium carbon steel, ensuring the fasteners possess high tensile and yield strength for heavy-duty applications. While the A325 specification strictly defines heavy hex structural bolts, the material properties are often applied to screws used in machine assembly, manufacturing jigs, and specialized structural connections that demand the same robust mechanical performance. Zeron Fastners provides A325 material-grade screws for applications requiring the strongest carbon steel fastener available for non-flange, high-load assemblies.

Related Products

ASTM A325 Hex Bolts ASTM A325 Stud Bolts ASTM A325 Nuts ASTM A325 Washers ASTM A325 Socket Head Cap Screws ASTM A307 Screws
ASTM A325 Screws

ASTM A325 Type 1 Bolting Chemical Composition

Element Content (%)
Carbon (C) 0.30 – 0.52
Manganese (Mn) 0.60 min
Phosphorus (P) 0.035 max
Sulfur (S) 0.045 max
Silicon (Si) 0.10 min
Boron (B) Optional

ASTM A325 Screws Mechanical Properties

Property 1/2" to 1" Diameter (min) 1-1/8" to 1-1/2" Diameter (min)
Tensile Strength 120 ksi (827 MPa) 105 ksi (724 MPa)
Yield Strength (0.2% Offset) 92 ksi (634 MPa) 81 ksi (558 MPa)
Elongation in 4D 14% 14%
Hardness (Brinell max) 319 HB 319 HB

ASTM A325 Screws Feature Products

Super Duplex S32750 Flanges Monel 400 Socket Cap Screws SS 316 Pipe Fittings Alloy Steel Cap Screws

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