Astm bolting valvespecification temperature material a193 a320. It is a fastener material specification defining typical chemical composition, mechanical properties, hardness requirement. Lightning bolt is an iso 9001 certified fastener manufacturer for astm a320 grade b8 class 2 stud bolts. An astm a320a320m current issue grade l7 studbolt is manufactured from aisi. Astm a193 astm a320 grade b8m class 2 aisi 316 strain hardened 14 34 78 1 118 114. Standard specification for alloysteel and stainless steel bolting for low temperature service. Astm a320 grade l7 bolts manufacturer, supplier and exporter of a320 bolts, a320 b8 bolts, a320 b8m bolt, astm a320 l7 lag bolt manufacturer of astm a320 aisi 4140 bolts, sa320 4140 hex bolts, aisi 4142 gr. Astm a193 grade b8 class 2 is a carbide solution treated 304304l stainless steel bolting material specification with maximum tensile strength requirement of 75 ksi or 515 mpa, yield of 30 ksi or 205 mpa and hardness of 223 hbw. Flanges bolting torque tables table 1 astm a193 and. C, however many manufacturers of bolts andor valves specify the narrower rating range shown. Class 1 stainless steel, aisi 304, carbide solution treated. Astm a320 b8m aisi ss 316 bolts, astm sa320 b8m aisi ss.
Astm a320 grade l7 material is chemically equivalent to astm b638 grade 660 stainless steel alloy, also known by alloy a286 and uns s66286, heat treated to achieve properties defined in astm a453 specification. Class 1 stainless steel, aisi 316, carbide solution treated. Aisi 316 is an austentic grade second to 304 in commercial importance it has additional molybdenum which gives improved corossion resistance when exposed to chlorides, it is immune to grain bundaries carbide precipitation. Astm a193 covers a number of other standard specifications not covered in this description including b5, b6, and b16. Astm a193 astm a320 grade b8 class 2 aisi 304 strain hardened 14 34 78 1. Astm a193 grade b8m class 2 specification boltport. P stud bolts, astm a320 sa193 grade l7m, plain the information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. This standard covers rolled, forged, or strain hardened bars, bolts, screws. Based on the dhs standards, danloc group is considered an essential and critical business because we support the continued safe operations of pipelines, refineries, chemical plants and other critical manufacturing. Section of the a962 specification addresses thread form and class. Astm a320 b8m aisi ss 316 bolts, astm sa320 b8m aisi ss 316. Astm a193a193m11 specifies the mechanical properties of bolts, screws and nuts made of austenitic amongst others stainless steels for high temperature or high pressure service and other special purpose applications. Astm a193 grade b8m class 2 specification for high tensile bolts, screws, stud bolts, anchor bolts, threaded rods, round bars and other externally threaded fasteners, made from 316 stainless steel.
Astm a320 scope this specification covers alloy steel and stainless steel bolting materials for low temperature service. B8m class 2 full specification stainless steel uk midland. Astm a320 a320m 18 standard specification for alloysteel. This standard is issued under the fixed designation a320a320m. For the material to be classed as grade l7 it must have the. Astm a320 grade l43 bolts and threaded studs are manufactured from aisi 4340 material and are also quenched and tempered. An astm designation number identifies a unique version of an astm standard. When you need astm a320 b8m class 2 bolts fast call ameribolt, inc. Alloysteel and stainless steel bolting for high temperature or high. As a trusted partner, danloc group is open for business, so you can perform in your business.
Astm a193 grade b8m specification boltport fasteners. When you need astm a193 b8m class 2 bolts fast call ameribolt, inc. Astm a320 specification includes chemical composition, mechanical properties, dimensional reference standards, recommended nuts and washers for grades like l7, l43, b8, b8m, b8c, b8t and. Generally below 1 38 bolts b8m class 2 is suitable for a b16. This specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for lowtemperature service. The torque values are approved for spiral wound graphite and ptfe filled gaskets, graphite sheet gaskets ghe and ghr types, ring joint, double jacketed and camprofile gaskets. A320a320m specification for alloysteel and stainless. A193 b8m,astm a93 grade b8m,a193 b8m class 2,astm a193 b8m,b8m bolts,b8m studs,grade b8m,b8m stainless,astm a193 grade b8m stud bolts etc. Astm a193 grade b8 class 2 is a carbide solution treated and strain hardened 304304l stainless steel bolting material with higher tensile strength requirement of 125 ksi or 860 mpa and 100 ksi or 690 mpa and maximum hardness of 321 hbw or 35hrc.
Product to be marked with the manufacturers marking and grade marking on one end of each stud 38. Astm a320 grade b8m class 2 square bolts, ss 316 astm a320 b8m machine. Astm a320 a320m 18 standard specification for alloy. Astm a193a193m b8 and b8m class 1 torquetension guide. Astm a320 grade l7 specification boltport fasteners. Class 2 strain hardened required for high pressurelarger sizes refer to.
Alloysteel and stainless steel bolting for lowtemperature service1. We stock a large amount of astm a320 grade b8m stud bolts. Below is a basic summary of a few of the common grades within the astm a320 specification. We stock a variety of astm a320 b8m class 2 aisi ss 316 din933, din 931. A193 b8m stud bolt and a194 8m hex nuts ss316 stud bolt. A193 b8m class 2 stainless steel bolts ameribolt, inc. Lightning bolt is an iso 9001 certified fastener manufacturer for astm a193 grade b8m class 2 stud bolts. F astm a320 gr b8 b8m bolting must be impact tested.
This specification covers requirements for chemical composition, mechanical properties, heattreatment, hardness, recommended nutswashers and markings for b8m class 2 fasteners. Specifies the thread form, series, class, allowance, tolerance, and desig nation for unified screw threads. Astm a320 b8m bolts astm a320 b8m hex bolts astm a320. We also can do a193 b7 metric studs, and lefthand thread studs. Astm a193 b8 class 2 stainless steel, aisi 304, carbide solution treated, strain hardened. L7 stud bolts, a320 l7 anchor bolt, astm a320 l7 flange bolt in india. Astm a193 grade b8m class 1 fasteners are similar to grade b8 but instead are manufactured from aisi 316 stainless steel as opposed to aisi 304 stainless steel. Astm a962 is a related specification that covers a group of common requirements as they relate to the a320 specification. B8 class 2 stainless steel, aisi 304, carbide solution treated, strain hardened. A number of other less common grades of astm a320 exist, but not covered in the description below. Astm a193 b8m astm a193 b8m bolt astm a193 b8m hex bolt. Astm a320 grade l7, a320 bolts, a320 b8 bolts, a320 b8m bolt. Astm a320 grade b8m class 1 bolts, astm a320 aisi ss 316 12 point bolts, astm a320 b8m aisi ss 316 flex lock bolts manufacturer in mumbai, india. Grade b8m class 1 fasteners require carbide solution treatment, while class 2 fasteners require an additional strain hardening operation.
Active standard astm a320 a320m developed by subcommittee. Grade of bolting b5 b6 b8 class 2 b8m class 2 service conditions. Astm a320 grade 8m class 1 fasteners are similar to grade b8 but instead are manufactured from aisi 316 stainless steel as opposed to aisi 304 stainless steel. Astm a320 a320m18, standard specification for alloysteel and stainless steel bolting for lowtemperature service, astm international, west conshohocken, pa, 2018. Class 2 stainless steel, aisi 316, carbide solution treated, strain hardened. These bolts are typically bought and sold in a plain, bare metal finish but are often hotdip galvanized, zinc plated, xylan coated, ptfe coated, or otherwise coated for corrosion resistance. Astm a320 grade b8f b8m astm a320 grade b8m b8 astm a320 grade b8 aisi 304 14 thru 34 over 34 thru 1 over 1 thru 114 over 114 thru 112 100,000 80,000 65,00 50,00 100,000 80,000 65,00 50,00 b8c astm a320 grade b8c aisi 347 b8f astm a320 grade b8f aisi 303or 303se b8m astm a320 grade b8m aisi 316 b8t astm a320. The above table is applicable only for astm a320 grade b8, class 2 and a193 grade b8, class 2 stud bolts.
Astm a320 specification includes chemical composition, mechanical properties, dimensional reference standards, recommended nuts and washers for grades like l7, l43. We stock a large amount of astm a320 grade b8m class 2 stud bolts. B8m class 1 stainless steel, aisi 316, carbide solution treated. Astm a320 l7 stud bolt manufacturer, astm a320 l7m stud bolt with two nuts,asme b18. Astm a193 b8m class 2 stainless steel, aisi 316, carbide solution treated, strain hardened. 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. Can anybody say the difference between astm a193 b8m cl. Production, supply, stock range of astm a320 b8m aisi ss 316 thread diameters. Astm a193 grade b8m fasteners are subdivided into 2 property classes with different tensile strength. Viha steel is your source for astm a193 b8m class 2 bolts from 14 to 2 diameter in multiple lengths with standard or custom thread lengths. Covers recommended stud bolt quantity, diameter, and length for use in flanged pipe fittings. Abstract below is a list of fastener specifications, the product designation i. B8c, b8m, b8t, b8f, b8p, b8ln, and b8mln shall receive a carbide solution treatment.
In the case of class 2, grades b8, b8c, b8m, b8p, b8f, and. Torqbolt is a well known stockist of pitch dia astm a320 grade b8ma round bars from. C material specifications astma193a193m aisi 501 astma193193m aisi 410 astma193a193m aisi type 304 astma193a193m aisi type 316 chemical composition carbon 0. Astm a193 b8t class 1 or 2 stainless steel, aisi 321, with additional element of titanium. Astm a320 l7 stud bolt manufacturer,astm a320 l7m stud bolt with two nuts,asme b18. Choosing the correct grade depends on several factors, such as mechanical properties, lowtemperature characteristics, and service. Astm a193a193m b8 and b8m class 1 torquetension guide 14 20 0.
Suggested assembly torque values the tapped hole or nut must have an equal or greater proof load than the studs minimum ultimate tensile strength. Allthread studs in astm a193 b7, a193 b7m, a193 b16, a320 l7, a193 b8, a193 b8m, a193 b8 class 2, a193 b8m class 2, low carbon and a449 among others. Astm a193 grade b8m class 2 stud bolts lightning bolt is an iso 9001 certified fastener manufacturer for astm a193 grade b8m class 2 stud bolts. With 120,000 square feet of manufacturing space we have the ability to supply large scale heavy construction projects as well as small same day specials.
Astm a320 gr b8ma bolts screws studs stud bolts torqbolt. Astm studbolt grade a193a320 b8m class 2 a193, b16 a320, l7 service temperature150c to 575c 0c to 525c 101c to 538c aisi material speci. Like the astm a193 specification, unless otherwise specified, the 8un thread series is specified on fastener larger than 1 in diameter. Call or email us lightning bolt and supply today, where our fastener experts can meet all of your fastener needs any fasteners any material. We stock a variety of astm a320 b8m class 2 aisi ss 316 din933, din 931, ansiasme b18. Type 316 stainless offers superior corrosion resistance to type 304 stainless due to the added molybdenum. A320 b8m class 2 stainless steel bolts ameribolt, inc. Astm a193 grade b8m is a standard material specification for high tensile 316316l stainless steel bolts, screws, studs and other external threaded fasteners, for use in high temperature or highpressure service and other special purpose applications. A193 gr b8m class 1 is a carbide solutiontreated 316 stainless steel bolting material with minimum tensile strength requirement of 75 ksi 515 mpa, yield 30 ksi 205 mpa, and maximum hardness of 223 hbw 96 hrb. B8m, class 2 stainless steel, aisi 316, carbide solution treated, strain. A320 summary astm a320 is a fastener specification covering alloy and stainless steel bolts and threaded studs for use with flanges, valves, pressure vessels, and fittings for lowtemperature service. Grades there are several grades within the a320 specification. Class 1d applies to material carbide solution treated by. Asme sa320 b8m bolts stockist in india asme, din, as, bs.
Astm a320 specification includes chemical composition, mechanical properties, dimensional reference standards, recommended nuts and washers for grades like l7, l43, b8, b8m, b8c, b8t and many others with notch. A320 grade b8 class 2 bolts are annealed and strain hardened to achieve increased strength characteristics. Grade 660 fasteners are used in bolting boilers, pressure vessels, pipeline flanges and valves, intended for high temperature service. For annual book of astm standards volume information, refer to the standards document summary page on. Class 2 stainless steel, aisi 304, carbide solution treated, strain hardened. Manufacturers marking may be placed on other end if insufficient space. A320 grade b8m bolts also do not require an impact test. F astm a320 gr b8b8m bolting must be impact tested. Astm, sae and iso bolting material projectmaterials. B5 b6 b8 class 2 b8m class 2 service conditions min. 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. Astm a193 grade b8 specification boltport fasteners. Astm a 194 standard specification for carbon and alloy steel nuts for bolts for highpressure and hightemperature service the ferritic steel grades l7 and l7m together with the austenitic grades b8 and b8m are normally.
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