Although a193 grade b16 bolts and studs have similar strength requirements as grade b7, the vanadium and higher tempering temperature helps the fasteners retain their molecular structure and strength under higher ambient temperatures than grade. Danloc group stocks heavy pattern hex nuts in the grades listed. There are several grades of bolts but the three common grades for sae are 2, 5 and 8. F1554 anchor bolts can take the form of either headed bolts, straight rods, or bent anchor bolts. Additional grades of a320 bolts exist but are not used frequently enough to list on. The material qualities for studs are defined in the different astm standards, and are indicated by grade. Materials bolts in astm a193 and nuts in astm a194 all grades scope astm a193 is the standard specification for alloysteel and stainless steel bolts used in hightemperature or highpressure environments or other specialpurpose applications.
Astm a320 grade l1 bolts screws studs stud bolts torqbolt. For aggressive fluids and environments, stud bolts can be coated with xylan, xylar and other materials. Chromiummolybdenum alloy steel astm a193 grade b7 is a material specification for low alloy chromiummolybdenum steel, used for manufacturing of bolts, studs, stud bolts and other fasteners for bolting pressure vessels, valves, flanges and fittings for various process industries across major industrial sectors. Astm a193 scope this specification is heavily utilized in petroleum and chemical construction applications and covers alloy steel and stainless steel bolting materials for high temperature or highpressure service. Alloy steel is highly hardened and usually black oxide andor oil coated, o. In addition to the indicated grade marking, all grades, except a563 grades o, a and b, must be marked for manufacturer identification. Most widely used austenitic high tensile bolts grade 8. The austenitic steel nuts, grade 8 and 8m are also available from stock for use on stainless steel studs and bolts. Glossary of fastener terms the bolt supply house ltd. Frequently used grades are a193 for thread rods and a194 for the. The following chart pictorially demonstrates the typical ten sionelongation relationship. Hex bolt identification, markings and strength chart table guide. Each grade possesses unique chemical requirements, strength requirements, testing requirements, and applications. Mechanical properties proof loadpsi yield strength min psi tensile strength min psi nogrademark sae j429 grade 1 bolts, screws, studs low or medium carbon.
There were a couple questions on there about the minimum stud grade that could be used in certain conditions, i. Astm a193 b7 stud bolt with two astm a194 2h nuts pipe. For metric bolts strength is according iso 898 mechanical properties of fasteners made of carbon steel and alloy steel described by property classes with designations 4. Lightning bolt is an iso 9001 certified fastener manufacturer for astm a320 grade b8 class 2 stud bolts.
Aisi 4140, 4142, 4145, 4140h, 4142h, and 4145h are common steel used for manufacturing grade b7 bolts. A193 b8m produced to grade aisi 316, carbide solution treated, standardly available in class 1. Astm a307 specifications covers 2 bolting grades with requirements for chemical composition, mechanical properties, heattreatment, recommended nutswashers and bolt markings. Similar to steel, it is a relatively poor electrical conductor. Bolt grades i have been on a quite a few online email lists over the last 7 years or so, basically since they first came out. Astm a 193 grade b8 class 2 strain hardened material regular series and heavy series 67609 stud, stain. This table shows the mechanical properties of b7, grade 5 and grade 8. Fully threaded hex bolts are also known as tap bolts. Din en 261573 applies with regard to limits for surface discontinuities for property classes 5. Flange stud bolts, bolts flanges chart, bolts flanges. Grade 2 may be used as an alternate for astm a307 grade a. Astm standard gives the list of marking symbol for various material grades.
Astm a193 grade b8 specification boltport fasteners. There are three grades within this specification, 36, 55, or 105. The grade 5 fastener has already reached its ultimate load and failed before the grade 8 starts to yield or stretch. For more specific information, please refer to the actual astm a193 specification which can be purchased directly from astm international. Mechanical properties proof load psi yield strength min psi tensile strength min psi no grade mark sae j429grade 1 bolts, screws, studs low or medium carbon steel 14 thru 112 33,000. Stud bolts, astm a193a193m and asme sa193sa193m, grade b7. Additonal information on bolts is located at the bottom of the webpage. The most common materials for stud bolts for flanges are astm a193 grade b7, b8, b8m, b8t, astm a453 grade 660, astm a320 grade l7, l7m, and astm a182 duplex and super duplex bolting. Nuts may be machined from the same material as stud or may be of a compatible grade of astm a194. Stainless steel fasteners, round bars, tube plug in india. Danloc group stocks the ferritic steel nuts in grades 2h, 2hm, 7, l7, and l7m which are normally used in conjunction with grade b7, b7m, b16, l7 and l7m studs. A193 b7 stud bolts grade b7 bolts a193 gr b7 bolts.
The following grades of heat treated alloy steel studs are commonly. It is a fastener material specification defining typical chemical composition, mechanical properties, hardness requirement. Consult the design engineer and the galvanizer for your. Mechanical properties of steel bolts, screws and studs. Some bolts share identical head identification and. Mechanical properties proof loadpsi yield strength min psi tensile strength min psi nogrademark sae j429 grade 1 bolts, screws, studs low or. Astm a193 b7 astm a307 astm a320 l7 astm a325 astm a354 bc astm a354bd astm a449 astm a490 sae grade 2 sae grade 5 sae grade 8. Understanding fastener grades and classes fastener mart.
General description of stud bolts and hex bolts used in petro. Nov 19, 20 torqueleaders white paper noted that grades 8. Additional grades of a320 bolts exist but are not used frequently enough to list on this site. Grade 8 hex cap bolts screws, nuts, flat washers, lock washers assortment kit.
A193 b7 heavy hex bolts are ideal for industrial and structural bolting application with hightemperature or highpressure service. Bolt grade markings and strength chart mechanical properties head marking grade and material nominal size range inch mm proof load psi mpa min. Astm a193 specification for alloysteel and stainless steel fasteners for high tensile or high temperature applications. Torqbolt is a well known stockist of pitch dia astm a320 grade l1 round bars from. The below estimated torque calculations are only offered as a guide. Grade b7 is the most common grade of a193 b7 alloy steel bolt material that is regularly utilized within the construction industry. Allpro threaded neither employs nor maintains an engineering or technica l staff, and allpro is merely supplying certain. It is estimated that over 90 percent of inch fastener series in canada and the united states have class 2a and 2b threads. The markings shown for all grades of a194 nuts are for cold formed and hot forged.
Identification grade mark specification fastener description material nominal size range in. Astm a193 grade b16 bolts and threaded studs are manufactured from a chromiummolybdenumvanadium alloy steel. Use of its content by anyone is the sole responsibility of that person and they assume all risk. A320 bolts can be specified in several different grades. Grade 5 bolt capability in tension failure 120,000 lbs in2 x. Astm, sae and iso grade markings for steel fasteners.
How does b7 material compare with grade 5 and grade 8. The following formula was used in establishing stud bolt. Head marking grade and material nominal size range inches mechanical properties. Download a complimentary pdf of our fastener markings chart. Manufacturers and suppliers of nickel alloy round bars, inconel nuts, hastalloy, monel washer, stainless steel tube plug, titanium, duplex and super duplex steel stud bolt, high tensile carbon steel hex bolts at best price for various industrial applications, hex nuts with extensive size range, dimensions and standard specifications. From the original jeepl list to the xjlist to the board, a common question comes. This website summarizes the similarities and differences between many of the grades. Astm a563 grade dh or a194 2h heavy hex sae j429 grade 8. Bolts in astm a193 and nuts in astm a194 all grades. P stud bolts, astm a193a193m and asme sa193sa193m, grade b7 stud with 2h heavy hex nut, plain, assembly. Din en iso 10683 applies with regard to zinc flake coatings. The following formula was used in establishing stud bolt lengths listed in. Color codes for painting the ends of f1554 graded rods. The most common grading system used for bolts in the u.
Alloysteel and stainless steel bolting for high temperature or high. The bolts can be either cut or roll threaded and a weldable grade 55 can be substituted for grade 36 at the suppliers option. The height of a nut for a stud bolt is the same as the diameter of the thread rod materials for stud bolts. This specification covers anchor bolts that are designed for anchoring structural supports to concrete foundations. P stud bolts, astm a193a193m and asme sa193sa193m, grade b7 stud. Steel 67623 b 8 x symbol for identification of grade, i. Lightning bolt is an iso 9001 certified fastener manufacturer for astm a193 grade b8m stud bolts.
This specification is intended for use in pressure vessels, valves, flanges, and fittings. Marking to be done at the ends of the stud or on the bolt head. Carbon steel bolts in astm a307 grades a and b glaser. Most widely used material grades are astm a194 gr 2,2h,2hm,8,8m. Carbon steel bolts in astm a307 grades a and b carbon and alloy steel nuts in astm a563. Use with heattreated mediumstrength steel fasteners like astm a325 structural bolts. Although a193 grade b16 bolts and studs have similar strength requirements as grade b7, the vanadium and higher tempering temperature helps the fasteners retain their molecular structure and strength under higher ambient temperatures than grade b7. Feel free to reach out to us for all of your b7 bolts, b8 studs, and any other type of fasteners used when consulting an asme b16.
Stud bolt with nuts point height l api type 6b flange l s figure 2. Fastener basics page 1 copyright 20002019 bolt depot inc. Bolt stud grade markings and strength chart author. Astm a307 specification for carbon steel bolts, studs, threaded rods and other externally threaded fasteners with 60 ksi tensile strength. Tensile strength psi mpa us bolts no markings grade 2 low or medium carbon steel 14 thru 34. General description of stud bolts and hex bolts used in. Stainless steel grades nuts, bolts, screws, washers, studs. This technical information is supplied as a courtesy. These metric grade b7 threaded rods meet the pressure and temperature requirements of astm a193 and are often used to secure pressure tanks, valves, and flanges. For more specific information, please refer to the actual astm a320 specification which can be purchased directly from astm international.
Dimensions from stud bolts are defined in the asme b16. Hex bolt identification, markings and strength chart table. Stud bolt technical information grades of alloy steel for stud bolts marking symbol grade of bolt b7 l7 b16 b8 class 1 b8m class 2 service conditions min. The three grades 36, 55, and 105 designate the minimum yield strength ksi of the anchor bolt. A193 b8 produced to grade aisi 304, carbide solution treated, standardly available in class 1. A193 b7 heavy hex bolts are ideal for industrial and structural bolting application with hightemperature or highpressure service environment. It is caused by a pushing or pulling force at 90 from the axis of a part.
Astm a193 b7m is a chromiummolybdenum alloy with minimum tensile of 100 ksi, yield 75 ksi and maximum hardness of 235 hwb. Stud bolts, astm a193a193m and asme sa193sa193m, grade. A307 bolts from glaser and associates are available in two grades, a and b, offering different mechanical and chemical properties for specific applications. These grade b7 threaded rods meet the pressure and temperature requirements of astm a193 and are often used to secure pressure tanks, valves, and flanges. There are several grades within the a193 specification. Astm a193 grade b8 specification covers requirements for 304304l stainless steel bolting material with high tensile properties, for use in high temperature or highpressure service and other special purpose applications.