Viha Steel amp Forging is a leading supplier and manufacturer of the high tensile fasteners in various grades and standards The high tensile bolts and nuts are often made in grade 8 8 10 9 and 12 9 These are used for large and forged parts in the automobile sector The steel grade used for these are often from carbon steels and boron steels prior to installing high strength bolts After fabrication steel members often sit idle before they are erected During this period light surface corrosion or oxidation often forms on the surfaces of uncoated blast cleaned steel This surface corrosion can actually be beneficial to the connec tion by increasing the slip resistance of the joint In fact tests have shown that a Class B slip 2016 07 29 nbsp 0183 32 The traditional bolt type designations remain i e Type 3 for weathering steel and Type 1 for bolts of other high strength steel compositions There are two bolt styles F1852 and F2280 are referred to as twist off style bolts while the others are Heavy Hex Style bolts All bolts manufactured after the publication date of F3125 in January 2015 must comply with the Bolt Grade Markings and Strength Chart Print this page US Bolts Head Marking Grade and Material Nominal Size Range inches Mechanical Properties Proof Load psi Min Yield Strength psi Min Tensile Strength psi 307A Low carbon steel 1 4 quot thru 4 quot N A N A 60 000 No Markings Grade 2 Low or medium carbon steel 1 4 quot thru 3 4 quot 55 000 57 000 74 000 Over 3 4 quot High strength bolts are extensively used to join steel structural elements in a great variety of applications The joint resistance is normally reached due to the bolt high strength with a reduced number of bolts located in a small plate area This fact induces the bolted connections to be associated with a failure mode known as block shear where a block area of the jointed

High strength Steel Bolts Classes 1 0 9 and 1 0 9 3 for Structural Steel Joints Metric AASHTO Designation M 253M OS ASTM Designation A 490M 04a ASTM AS63M A 709M TS 4f AASHTO M 253M 05 is identical to ASTM A 490M 04a except for the following provisions 1 All references to the ASTM standards contained in ASTM A 490M 04a listed in the following table shall be China High Strength Steel Bolts Suppliers Ultra high strength heat treated anchor steel bar is a high performance steel that is inductively heat treated from hot rolled steel bars It is widely used in anchoring supporting reinforcement and other projects in coal mine roadways highway slopes tunnels dams urban foundation pits etc Pre stressed concrete works especially in coal mines 1993 01 08 nbsp 0183 32 Strength properties for bolt steel according to EN 1991 1 8 Table 3 1 Bolt class Symbol Description 4 6 4 8 5 6 5 8 6 8 8 8 10 9 f yb MPa Yield strength 240 320 300 400 480 640 900 f ub MPa Ultimate tensile If you have any damaged bolts replace the full set with this high strength kit These bolts are designed with strength in mind made of heat treated steel 12 9 strength grade common stock bolts are 8 8 strength grade Finish with a grey quot Titanium quot color for the look 2020 06 05 nbsp 0183 32 High strength bolts or structural bolts are made to be used with heavy hex nuts to connect structural members To be considered a structural connection it has to conform to specific ASTM standards specifically ASTM A563 or ASTM A194 Structural bolts are also categorized by grades

Screws and bolts made from high tensile steel can withstand high levels of strain without losing their strength or structure Take a look at some of our products available in High Tensile Steel Threaded rod Available in Grade 4 8 to 12 9 High tensile bolts Available in Grade 5 5 to 12 9 Hexagon Set Screws High tensile steel bolts and fixings are typically available in grades 8 8 to ASTM A325 Bolt Dimensions Chart Sizes Strength ASTM A325 bolts are one of the most commonly used fasteners usually used for structural steel connections in heavy steel structures It contains two types of quenched and tempered steel heavy hex structural bolts Type 3 weathering steel Type 2 withdrawn in 1991 Grade A490 bolts are available in diameters from 1 2 to 1 1 2 inch diameters with a minimum tensile strength of 150 000 PSI for all diameters and are offered in two types Type 1 is alloy steel and Type 3 is weathering steel that offers atmospheric corrosion resistance similar to that of ASTM A242 or A588 steels 2018 07 26 nbsp 0183 32 The traditional bolt type designations remain i e Type 3 for weathering steel and Type 1 for bolts of other high strength steel compositions There are two bolt styles F1852 and F2280 are referred to as twist off style High tensile bolts made of high strength steel or bolts that require greater pre tightening force can be called high strength bolts High strength bolts are mostly used for the connection of bridges rails high pressure and ultra high

High strength bolts are made from high strength carbon steel or from tempered alloy steel The high strength materials tend to increase the bolt strength roughly by 25 to 50 BACO Enterprises Inc has been in business since 1981 and has continually provided various industry partners with high quality standard and custom designed and manufactured fasteners and Viha Steel amp Forging is a leading supplier and manufacturer of the high tensile fasteners in various grades and standards The high tensile bolts and nuts are often made in grade 8 8 10 9 and 12 9 These are used for large and forged Choose from our selection of stainless steel bolts including 18 8 stainless steel hex head screws 18 8 stainless steel socket head screws and more In stock and ready to ship China High Strength Steel Bolts Suppliers Ultra high strength heat treated anchor steel bar is a high performance steel that is inductively heat treated from hot rolled steel bars It is widely used in anchoring supporting reinforcement and other projects in coal mine roadways highway slopes tunnels dams urban foundation pits etc Pre stressed concrete works especially in coal mines High Strength Steel Bolts manufacturer factory supplier from China iso 898 grade 12 9 threaded rod and bar astm a193 grade b7 all threaded rod astm a193 grade b16 threaded rod and bar astm f1554 grade 55 steel threaded rod SAE J429 grade 8 steel threaded rods 4340 quenched amp tempered steel round bar sncm439 quenched amp tempered steel round bar 4130

HIGH STRENGTH BOLTS IN STEEL STRUCTURES CODE OF PRACTICE First Revision 1 SCOPE 1 1 This standard covers the requirements for the design fabrication assembly and inspection in all types of steel structures of structural joints using high strength bolts conforming to IS 3757 1985 CHigh strength structural boltsChina High Strength Steel Bolts Suppliers Ultra high strength heat treated anchor steel bar is a high performance steel that is inductively heat treated from hot rolled steel bars It is widely used in anchoring supporting reinforcement and other projects in coal mine roadways highway slopes tunnels dams urban foundation pits etc Pre stressed concrete works especially in coal mines 2014 08 01 nbsp 0183 32 High Strength Bolts August 1 2014 includes April 2015 Errata Supersedes the December 31 2009 Specification for Assembly of Structural Joints Using High Tensile Steel Bolts was published in January 1951 Since that time the Council has published seventeen successive editions Each was developed through the deliberations and approval of the full The particularly high tensile strength of this material makes for high strength bolts and threaded bolts that withstand incredible tensile forces With a value of 13 8 t cm 178 this steel alloy is approximately twice as stable as the best standard bolts 1993 01 08 nbsp 0183 32 Strength properties for bolt steel according to EN 1991 1 8 Table 3 1 Bolt class Symbol Description 4 6 4 8 5 6 5 8 6 8 8 8 10 9 f yb MPa Yield strength 240 320 300 400 480 640 900 f ub MPa Ultimate tensile strength 400 400 500 500 600 800 1000 Copy to Clipboard Design properties for metric hex bolts Typical coarse pitch thread Design