Which is stronger A325 or A490?
A490 bolts are more susceptible to brittle fracture than A325 bolts which are 120/105 minimum tensile strength steel. To minimize the risk of brittle fracture A490 bolts have both a minimum and a maximum tensile strength specified. FHWA recommends that A325 bolts be used wherever possible.
Are A325 bolts hardened?
Carbon Steel A325 Hex Bolts cannot be hardened by heat treatment, because annealing is carried out between 1850 Degree / 2050 Degree F (1010 Degree / 1120 Degree C) followed by a water quench.
What is a high strength bolt?
High Strength Bolts For Structural Bolting Bolts are fasteners with external threads designed for driving through holes in assembled parts. These fasteners are tightened or released through torqueing a nut. High strength bolts are made from high-strength carbon steel or from tempered alloy steel.
Is A325 the same as Grade 5?
ASTM A325 bolts are very similar to SAE Grade 5 bolts in regards to their chemical and mechanical properties. A325 structural bolts are typically heavy hex bolts, whereas Grade 5 bolts are most typically made, and are readily available, in a standard hex bolt configuration.
What is SAE J429?
SAE J429 covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in sizes to 1-1/2” inclusive.Below is a basic summary the most common grades. SAE J429 covers a number of other grades and grade variations not covered in this summary, including 4, 5.1, 5.2, 8.1, and 8.2.
What is a Grade 2 bolt in J429?
J429 Mechanical Properties. Grade 2 requirements for sizes 1/4″ thru 3/4″ apply only to bolts 6″ and shorter, and to studs of all lengths. For bolts longer than 6″, Grade 1 requirements shall apply.
What are the J429 mechanical properties?
J429 Mechanical Properties Grade Nominal Size, inches Full Size Proofload, psi Yield Strength, min, psi Tensile Strength, min, psi Elong, min, % RA, min, % Core Hardness, Rockwell Tempering Temperature, min 1 1/4 thru 1-1/2 33,000 36,000 60,000 18 35 B7 to B100 N/A 2 1/4 thru 3/4 55,000 57,000 74,000
What is Grade 8 ASTM A193 B8?
Grade 8 ASTM A193 B8M Class 1 1/4 & larger 75,000 30,000 B96 A 316 Stainless Steel used for high temperature applications. This material has been carbide solution treated. ASTM A193 B7 Chromium-Molybdenum alloy (4140, 4142, 4145, 4140H, 4142H, 4145H) used for high- pressure, high-temperature applications.