Grade B7 Bolt Materials Grade B7 is the most common grade of A193 B7 alloy steel bolt material that is regularly utilized within the construction industry A193 b7 stud bolts are manufactured from chromium molybdenum steel and are heat treated to provide increased strength and reliability We offer these bolts in the following materials Plain Hex Bolts studs and other fasteners are common to the B8M spec ASTM A193 Grade B8 Class 2 Studs bolts and other fasteners found in this grade are considered the same as B8 except strain hardened Bolts Screws Studs for High Temperature Service CrMoVa Alloy Steel 1⁄4 thru 2 189 Over 2 189 thru 4 Over 4 thru 7 −− −− −− 105 000 95 000 85 000 125 000 115 000 100 000 SAE J429 Grade 1 No Grade Mark Bolts Screws Studs 60 000 Bolts Screws Studs ASTM A307 Grades A amp B 60 000 STANDARD BOLT IDENTIFICATION MARKINGSStud bolt manufacturer ASME B18 2 1 Stud Bolt amp ASME B18 2 2 Hex Nuts，Stud Bolt amp Nuts xylan 1070 xylan 1424 coated stud bolt ASTM A193 B7 Stud Bolt ASTM A194 Hex Nuts15 1 2021 nbsp 0183 32 ASTM A193 B7 stud bolts with a diameter of 2 5 inches or less will have a yield strength of 105 000 PSI Grade B7 fasteners with a stud diameter of 2 5 8″ to 4″ diameter have a lower yield strength of 95 000 PSI 4″ to 7″ inch stud bolts have an even lower yield strength of

STUD BOLTS WITH NUTS MACHINE BOLT WITH NUTS LLLL Stud Bolts Mach Bolts Stud Bolts Mach Bolts Stud Bolts Stud Bolts Stud Bolts Stud Bolts DN NPS inch mm mm inch mm mm inch mm inch mm inch mm inch mm 15 189 4 1 2 60 45 4 1 2 65 55 4 1 2 80 4 3 4 105 4 3 4 105 4 3 4 125 20 190 4 1 2 65 50 4 5 STUD BOLT SPECIFICATION High Tensile Hex Bolts Screws Metric Series Dimensions Note 1 The bolts and screws will generally confirm to IS 1364 2 Threads will generally confirm to class 6G of IS 4218 3 Material High grade carbon alloy steel 4 Heat Treatment Property class 8 8 or 10 9 5 Thread Length Bolts shall be half threaded Double End Stud bolts can be manufactured as per DIN 938 Specification with metric thread M3 to M52 and metric fine thread M8x1 to M52x3 As specified in DIN 267 2 the tap end studs shall be produced to tolerance Sk6 as in DIN 13 51 unless the stud is designated without interference Fit Thread Fo or Sn4 Torque Tension Relationship for ASTM A193 B7 Bolts and Studs Tightening Torque K 0 12 K 0 15 K 0 20 in lbs lbs has a proof load greater than or equal to the bolt s minimum ultimate tensile strength Clamp load calculated as 75 of the yield It is not part of the ASTM A193 specification Title Microsoft Word B7 Torque Dimensional recommendations for bolts stud bolts and nuts are shown in below table Also see table 2 for bolting material recommendations 2 2 Bolt Lengths Stud bolt lengths including the heigh tof two heavy hexagon nuts are shown as dimension L in all dimension tables The tablulated stud bolt length L does not include the height of the

ASTM A193 B7 vs A320 L7 Stud Bolts ASTM A193 B7 is a Bolting specification for medium high temperature applications It is a heat treated Chromium Molybdenum steel and is considered for applications up to 450 176 Celsius 840 176 Fahrenheit ASTM A320 L7 has the same chemical and physical properties as B7 with additional Charpy V Notch tests taken at 101 176 Celsius 150 176 ASTM A307 Standard Specification for Carbon Steel Bolts Studs and Threaded Rod 60000 PSI Tensile Strength This specification covers the chemical and mechanical requirements for three grades Grades A B and C of carbon steel bolts and studs in specified sizes Due to excellent quality and durability these High Tensile Stud Bolt amp Nut are famous among its user These Stud Bolt Anchor are made from very high quality raw material which ensures high durability at its user end High Tensile Stud Bolt Specification ASTM A193 A194 High Tensile Stud Bolt Specification Size Normal Dia 188 to 4″ 6 100 mmASTM A193 Grade B8 Stud Bolts are high strength 304 stainless steel bolts coupled with pair of A194 8 nuts for bolting carbon and stainless steel pipelines Boltport is a manufacturer and supplier of fully threaded tap end and double end stud bolts in ASTM A193 Grade B8 Class 1 Class 2 amp Class 2B specification Stud bolts are used in conjunction with hex nuts on each end while a stud is threaded pressed or otherwise secured to an object on one end and a nut is used on the other T Head Bolt A T head bolt has a flat T shaped head which either fits into a

ASTM Specifications for Bolt Fasteners A193 Alloy steel and stainless steel bolting materials for high temperature or high pressure service A307 Carbon steel bolts and studs 60 000 psi tensile strength A320 Alloy steel and stainless steel bolting materials for STUD BOLT WITH NUTS POINT HEIGHT L API TYPE 6B FLANGE L S Figure 2 0 1 L API TYPE 6BX FLANGE NO STANDOFF AWHEM Recommendation For Stud Bolts and Tap End Studs For API Spec 6A 4 2 0 METHOD OF CALCULATING STUD BOLT LENGTHS FOR TYPE 6B AND 6BX FLANGES 2 0a CALCULATION The following formula was used in establishing ASTM A193 Grade B7 Specification for high tensile bolts screws stud bolts threaded rods anchor bolts and other externally threaded fasteners made from chromium molybdenum alloy steel ASTM A193 Grade B7 is a standard material specification for chromium molybdenum alloy steel fasteners for use in high tensile high temperature and special purpose applications ASTM F1941 F1941M Electrodeposited Coatings on Fasteners Stud Bolts Nuts Screws Threaded Rod amp Washers ASTM F1941 F1941M specification covers application performance and dimensional requirements for electrodeposited coatings on threaded fasteners with unified inch and metric screw threads but it may also be applied to other threaded parts and non 19 9 2018 nbsp 0183 32 tap end stud with nut point height l api type 6b flange api type 6bx flangeapi type 6b flange l with r gasket with rx gasket s s l no standoff l figure 3 0 1 awhem recommendation for stud bolts and tap end studs for api spec 6a 7 3 0 method of calculating tap end stud lengths for type 6b and 6bx flanges 3 0a calculation

Stud Marking Marking requirements for stud amp bolt are specified in ASTM material Standard A193 and A320 Marking to be done at the ends of the stud or on the bolt head Due to limited space only the Manufacturer s identification mark amp Material Grade Class are marked on stud and bolt Table 4 Material Selection of Bolts and Nuts Temperature ASTM Materials Specification Service Category Range 176 C Minimum Maximum Stud Bolts Nuts Process and 40 450 A193 Grade B7 A194 Grade 2H general services 73 450 A320 Grade L7M A194 Grade 7M Low temperature and cryogenic 101 343 A320 Grade L7 A194 Grade 4 or 7 services 198 50 BOLT SPECIFICATIONS For Standard ANSI Flanges Cont Flange Designation Bolt Qty Bolt Dia in Bolt Length in Raised Face Ring Joint 10 150 12 7 8 4 3 4 5 1 4 10 300 16 1 6 1 4 7 10 400 16 1 1 8 7 1 2 7 3 4 7 1 4 10 600 16 1 1 4 8 1 2 8 3 4 8 1 4 10 900 16 1 3 8 9 1 4 9 1 2 9 10 1500 12 1 7 8 13 1 4 13 3 Stud Bolt length are defined in ASME B16 5 standard The length in inches is equal to the effective thread length measured parallel to the axis from the first to the first thread without the chamfers points First thread is defined as the intersection of the major diameter of the thread with the base of the point Notes 8 Mechanical property requirements for studs shall be the same as for bolts 9 Bolting materials suitable for high temperature service with austenitic stainless steel valve materials 10 Nuts may be of the same material or may be of compatible grade of ASTM A194