Astm a320 l7 equivalent

Astm a193grade b8t aisi 321strain hardened 100,000 80,000 65,000 50,000 125,000 115,000 105,000 100,000 l7 astm a320grade l7 bolts,screws, studs for lowtemperature service aisi 4140,4142 or 4145 14 thru 212 105,000 125,000 l7a astm a320grade l7a aisi 4037 l7b astm a320grade l7b aisi 47 l7c astm a320grade lc7 aisi 8740. Astm a320a320m18 standard specification for alloysteel and stainless steel bolting for lowtemperature service. Similarly if we talk about the material astm a320 grade l7 material is a physical requirement for bolts, studs, nuts and other snaps, planned for use in high temperature fastening applications. Astm, sae and iso grade markings for steel fasteners. Astm a320 grade l7 bolts, studs, and other fasteners under the l7 grade have the same chemical and physical properties as b7. Astm a320 possesses several fastener grades manufactured from either alloy or stainless steel and are intended for cold temperature applications. With nearidentical chemical properties, b7 and l7 differ in their testing requirements astm a320 l7 bolting is specified for lowtemperature service, and as such has additional impacttesting. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used. It is a heat treated chromium molybdenum steel and is considered for applications up to 450 celsius 840 fahrenheit. Both grade l7 and l7m are manufactured from a quenched and tempered alloy steel. What is the difference between astm a320 l7 and astm a320 l43. Such fasteners are commonly used for low temperature service.

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. I would think any material bought to make a320 grade 7 parts will have to say that it conforms to astm a320 l7 on the manufactures test reports. It is a heat treated chromium molybdenum steel and is considered for applications up to 450. Astm a320 bolts, astm sa320 hex bolts, stainless steel. Astm a320 a320m15a, standard specification for alloysteel and stainless steel bolting for lowtemperature service, astm international, west conshohocken, pa, 2015. Im interested to know if there are differencies between astm a320l7m and l7. Special steels conforming to the astm american standards. Astm a320 bolts and nuts, astm a320 l7m stud bolts material. Identification grade mark specification fastener description material nominal size range in. Astm a320 bolts manufacturers in india, leading astm a320 grade l7 bolts. Fastener specifications astm a193, a320, a307, a325, a593.

All material included in this chart is advisory only, and its use by anyone is voluntary. Astm a320 bolts is intended for lowtemperature service down to 150 f and has a minimum charpy impact value of 20ftlbf at this temperature. The chemical composition is equivalent to alloy a286 or uns s66286 stainless steel used as a raw material to produce 660 bolts, studs and nuts. Grade 660 fasteners are used in bolting boilers, pressure vessels, pipeline flanges and valves, intended for high temperature service. These asme sa320 l7 sturdy fasteners are used to connect heavy materials. 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. A320 grade l7 bolting material practical machinist. Indias largest astm a320 grade l7 material suppliers, a320 grade l7m material exporter in india.

Download a complimentary pdf of our fastener markings chart. Astm a320 grade l7 is a standard specification for high tensile alloy steel bolting materials, intended for use in low temperature service, covering rolled, forged or. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Astm a320 scope this specification covers alloy steel and stainless steel bolting materials for low temperature service. Astm a320 a320m bolts manufacturer, sa320 bolts supplier in india asme, din, as, bs. Steel produced at the quenched and tempered state according to the united states standard astm a320, used for linkages and bolts. Astm a320 bolts and nuts, astm a320 l7m stud bolts. Astm a320 grade l7 bolts stainless steel fastener, duplex steel. Astm a320 grade l7, a320 bolts, a320 b8 bolts, a320 b8m bolt. A320 bolt dimensions, astm a320 l7m bolt specification and equivalent. A320a320m is written for low temperature applications. Astm a320 bolts, astm a320 l7m stud bolts, a320 bolts and. A270 hex bolt a270 ss hex bolt a270 ss full threaded.

Like the astm a193 specification, unless otherwise specified, the 8un thread series is specified on fastener larger than 1 in diameter. There is no hint as to heat treat unless you get your self a copy of the a320 l7 spec. Astm a193 b7 is a bolting specification for mediumhigh temperature applications. Astm a320 l7 aisi 4140 bolts, astm sa320 l7 aisi 4140 stud. See the chemical composition and physical properties of astm a320 grade l7 quenched and tempered, find alternative materials, and connect with suppliers. Additional grades of a320 bolts exist but are not used frequently enough to list on this site. Additional requirement that it meet a charpy test at 150 degrees f is needed. Contact american fastener with any questions or for a custom quote.

Choosing the correct grade depends on several factors, such as mechanical properties, lowtemperature characteristics, and service. Supplies a full range of astm a320 l7 stud bolts, astm a320 grade l7 nuts. Astm a320 grade l7 chemical compositions boltport fasteners. We owned a position of leading manufacturer and supplier of astm a320 l7 nuts amongst clients, which are used in. A number of other less common grades of astm a320 exist, but not covered in the description below. Astm a320 a320m07, standard specification for alloysteel and stainless steel bolting materials for lowtemperature service, astm international, west conshohocken, pa, 2007. About their differencies i have found that l7 are mechanically better than l7m and also that l7m are in accordance to nace requiremnts. Astm a320 l7 aisi 4140 4142 stainless steel fasteners. We specialize in supply of astm a320 t bolts, along with equivalent fittings for. Astm a320 l7 hexagon nuts, astm a320 self locking nut, astm a320. Below is a basic summary of a few of the common grades within the astm a320 specification. Differencies between astm a320 l7m and astm a320 l7. Steel produced at the quenched and tempered state according to the united states standard astm a320, used for linkages and bolts destined for use at low temperature in the oil industry. Mechanical properties proof loadpsi yield strength min psi tensile strength min psi nogrademark sae j429 grade 1 bolts, screws, studs low or medium carbon.

Astm a320 specification astm a320 grade l7 grade l43. Astm a320 l7 specification covers alloy steel bolting materials such as rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts for pressure. Contact us to get the astm a320 bolts, astm a320 l7m bolt, astm a320 grade l7 stud bolts detailed price list. L7, astm a320 grade l7, bolts, screws, studs for low temperature service. While the chemical requirements for both grades l7 and l7m are identical, there are several differences that separate the two grades.

The austenitic steel nuts, grade 8 and 8m are also available from stock for use on stainless steel studs and bolts. Tarq bolt is a leading manufacturer and exporter of astm a320 bolts in india. 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 a320 l7 stud bolts, stainless steel a320 l7m bolts. In developing this information, fastenal has made a determined effort to present its contents accurately. Valve body material corresponding bolting material nuts lower temp. 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. Astm a320 nuts, bolts, and fasteners atlanta rod and. Astm a320 grade l7 fasteners manufacturers astm a320. These fasteners are commonly used for valves, flanges, fittings, and pressure vessels. For more specific information, please refer to the actual astm a320 specification which can be purchased directly from astm international. Astm a320 l7 stud bolts are specially engineered for low temperature performance.

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. Grades l7 alloy steel aisi 41404142 quenched and tempered. Chemical analysis of raw material or finished products manufactured to astm a320 grade l7 specification must comply with below analysis. Astm a320 grade l7 is confidential into 4 property period, and each nominated with different ductile. We supply best quality a320 grade l7 alloy steel bolts, astm. Astm a320 a320m 15a standard specification for alloy. Our inventory includes astm sf593 bolts in many grades including din933 din 931 ansiasme b18. Astm a320 a320m 07 standard specification for alloy.