ASTM A325 Galvanized Bolts and Nuts


A325 Types

TYPE 1Medium carbon, carbon boron, or medium carbon alloy steel.
TYPE 2Withdrawn November 1991.
TYPE 3Weathering steel.
TFully threaded A325. (Restricted to 4 times the diameter in length)
MMetric A325.

A325 Connection Types

SCSlip critical connection.
NBearing type connection with threads included in the shear plane.
XBearing-type connection with threads excluded from the shear plane.

A325 Mechanical Properties

SizeTensile, ksiYield, ksiElong. %, minRA %, min
12 – 1120 min92 min1435
118 – 112105 min81 min1435

A325 Type 1 Chemical Properties

Heat Analysis120ksi, %150ksi, %
Carbon0.30 – 0.520.30 – 0.48*
Manganese0.60 min0.60 min
Phosphorus0.035 max0.035 max
Sulfur0.040 max0.040 max
Silicon0.15 – 0.30
Boron0.003 max0.003 max
*Carbon 0.35-0.53% for 1-1/2” A490/150ksi bolts

A325 Type 3 Chemical Properties

Heat Analysis120ksi, % Comp A120ksi, % Comp B120ksi, % Index150ksi, % Index
Carbon0.33 – 0.400.38 – 0.480.30 – 0.520.30 – 0.53
Manganese0.90 – 1.200.70 – 0.900.60 min0.60 min
Phosphorus0.035 max0.035 max0.035 max0.035 max
Sulfur0.040 max0.040 max0.040 max0.040 max
Silicon0.15 – 0.300.30 – 0.50
Copper0.25 – 0.450.20 – 0.400.20 – 0.600.20 – 0.60
Nickel0.25 – 0.450.50 – 0.800.20 min*0.20 min*
Chromium0.45 – 0.650.50 – 0.800.20 min0.20 min
Molybdenum0.06 max0.10 min*0.10 min*
*Either Nickel or Molybdenum must be present in the amount specified *Corrosion Index based on ASTM Guide G101

A325 Recommended Hardware

Type 1Type 3Type 1Type 3
A563C, C3, D, DH, DH3A563DHA563C3, DH3F436-1F436-3

TFIT Fasteners Provide the A325 covers high strength primary bolts utilized in underlying steel associations. A325s have a weighty hex head, a full body measurement, and are regularly short in generally length since they are interfacing steel to steel.

Dissimilar to other ASTM grades, A325 is explicit in the substance and mechanical prerequisites, yet in addition in the permitted design. These bolts range in distance across from 1/2″ through 1-1/2″ and are fabricated from a medium-carbon or medium-carbon compound steel that is extinguished and tempered to foster the ideal mechanical properties.