ASTM A325 hex bolts,ASTM F3125 Grade A325 / A490 Type 1 Structural Heavy Hex Bolts

We are a professional manufacturer of ASTM A325 Bolt,Din933 ASTM A325 hex bolts

Specification ASTM A325 for High Strength Structural Bolts was withdrawn in May 2016, and replaced by ASTM F3125. Today, A325 is a grade of ASTM F3125 Bolts.

ASTM F3125: Standard Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength.

Standard: ASTM A325/Din933 hex bolts
Dia.: 1/2″”-1 1/2″”;
Length:1 1/4″”-8″”;
Surface treatment: Plain ,Black oxygenation, HDG hot dip galvanizing

The ASTM A325 specification covers high strength heavy hex structural bolts from ½” diameter through 1-1/2” diameter. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Refer to the Structural Bolts page of our site for thread lengths and other related dimensions.

This specification is applicable to heavy hex structural bolts only. For bolts of other configurations and thread lengths with similar mechanical properties, see Specification A 449.

Bolts for general applications, including anchor bolts, are covered by Specification A 449. Also refer to Specification A 449 for quenched and tempered steel bolts and studs with diameters greater than 1-1/2″” but with similar mechanical properties.

Types

TYPE 1	Medium carbon, carbon boron, or medium carbon alloy steel.
TYPE 2	Withdrawn November 1991.
TYPE 3	Weathering steel.

T	Fully threaded A325. (Restricted to 4 times the diameter in length)
M	Metric A325.

Connection Types

Mechanical Properties

Size	Tensile, ksi	Yield, ksi	Elong. %, min	RA %, min
1/2 – 1	120 min	92 min	14	35
1-1/8 – 1-1/2	105 min	81 min	14	35

Recommended Nuts and Washers

Nuts			Washers
Type 1		Type 3	Type 1	Type 3
Plain	Galvanized	Plain
A563C, C3, D, DH, DH3	A563DH	A563C3, DH3	F436-1	F436-3
Note: Nuts conforming to A194 Grade 2H are a suitable substitute for use with A325 heavy hex structural bolts. The ASTM A563 Nut

A325 Type 1 Hex bolts Chemical Properties

Heat Analysis	120ksi, %	150ksi, %
Carbon	0.30 – 0.52	0.30 – 0.48*
Manganese	0.60 min	0.60 min
Phosphorus	0.035 max	0.035 max
Sulfur	0.040 max	0.040 max
Silicon	0.15 – 0.30	–
Boron	0.003 max	0.003 max
Copper	–	–
Nickel	–	–
Chromium	–	–
Molybdenum	–	–
*Carbon 0.35-0.53% for 1-1/2” A490/150ksi bolts

ASTM F3125 Marking Requirements & Matching Components

	120ksi, Type 1	120ksi, Type 3	150ksi, Type 1	150ksi, Type 3
Marking	A325	A325	A490	A490
Nut, Plain	A563 DH	A563 DH3	A563 DH	A563 DH3
Nut, Coated	A563 DH	A563 DH3	A563 DH	A563 DH3
Washer	F436-1	F436-3	F436-1	F436-3
A194 2H nuts are an acceptable substitute for A563 DH nuts
Suitable plain finish nut alternatives can be found in the full F3125 text
Supplementary requirements S1 and S2 have special marking requirements.