ASTM A574 Bolts

Buy Grade AISI 8740 Bolts, ASTM A574 Screw at low cost

The American Society for Testing and Materials A574 is a specification that lists down requirements for alloy steel socket-head cap screws. Per this specification, the A574 Socket Cap Screws are available in the quenched and tempered condition. Both quenching and tempering are heat treatments that are used to strengthen and harden alloy various steel grades.The quenching process performed on the A574 Bolts is a tightly controlled one and it involves heating the material following which the bolts are then rapidly cooled.


The A574 Hex Bolts is rapidly cooled in order to set the components in place as fast as possible. Tempering these fasteners is used to achieve both greater toughness as well as increased ductility by reducing the hardness of the material. Because the Grade AISI 8740 Bolts are tough, they naturally inherit other important yet simultaneous properties such as increased resistance to wear and good resistance to abrasion. Thus giving the alloy steel grade A574M Bolts an edge over conventional carbon steel fasteners. Hence the A574 Screw is used in demanding applications where they are a part of either machinery or structures in those areas where greater resistance to abrasion as well as higher yield strength are prime requirements for e.g. mining, earthmoving, quarrying, and construction.

ASTM A574 Material Sizes And Schedule Specifications

Grade 2, B7, 9.8, 5.8, 5, 8.8, 12.9, 8, L9, 10.9, 4.6
Inch 0 -3"
Material Bronze / Coppe, Brass, Copper, Steel, Molybdenum, Hardened Steel, Superalloy Inconel, Hastelloy, 718 Bolts, Monel, Stainless Steel, Exotic Metals, Titanium, Other
Metric M1.6 - M48
Application Industries & uses Automotive, Agriculture, Energy, Construction and Infrastructure, Transportation
Length Customized Length
Standards BS, ASME / ANSI, SAE, DIN, JIS, ISO, Other
Threads Configuration B1.13M 6h-6G, ASME B1.1 2A/3A – 2B/3B
Certification American Society for Testing and Materials & ASME
Method Cold forming, Hot Forging, Wire Forming
Testing Methods E38, E54, E53, E62, E34
Thread Diameters M7 to M37

A variety of ASTM A574M Bolts, ASTM A574 Hex Bolts, ASTM A574 Socket Cap Screws Contact for free sample

A574M Socket Head Cap Bolts Grades

AISI 4037 AISI 4042 AISI 4137 AISI 4140 AISI 4142
AISI 4145 AISI 4340 AISI 8740

ASTM A574 Anchor Bolt Chemical Material Composition

Element Product Analysis % Heat Analysis %
Carbon 0.31 0.33
Phosphorus 0.040 0.035
Sulfur 0.045 0.040

Mechanical Characteristics of ASTM A574 Screw

MECHANICAL PROPERTIES: MACHINED TEST SPECIMEN
Property Less than, or equal to, 0.500" dia. Greater than 0.500" dia.
Yield strength at 0.2% offset, ksi min 153 153
Tensile Strength, ksi min 180 170
Elongation in 5D, min 10% 10%
Reduction of Area, min 35% 35%
MECHANICAL PROPERTIES: FULL SIZE SCREWS
Property Less than, or equal to, 0.500" dia. Greater than 0.500" dia.
Tensile or Wedge tensile strength, ksi min 180 170
Proof Load (stress), ksi 140 135
Rockwell (HRC) 39 - 45 37 - 45