What is ASTM A320 Grade L7 Fasteners ?

The ASTM A320 Grade L7 Fasteners have characteristics that are similar to the stainless steel types such as both the austenitic along with the ferritic. These fasteners are widely used in cryogenic applications where the temperature could go below -150 degree fahrenheit. Therefore, these ASTM A320 Grade L7 Fasteners are used in a large variety of applications where the temperature could not be favorable

The chemical composition of these ASTM A320 Grade L7 Fasteners have properties that make them mechanically strong. These fasteners are also resistant towards corrosion. They also have the characteristics of being strong as well as hard. Because of it being resistant towards the temperatures, Corrosion as well as having good tensile strength they are used in a large amount of industrial applications.


ASTM A320 Grade L7 Socket Head Cap Bolts, ASTM A320 Grade L7 U-Bolts Dealer in Mumbai, ASTM A320 Grade L7 Heavy Hex Bolts Supplier, ASTM A320 Grade L7 60000 PSI Tensile Strength Bolts Exporter, ASTM A320 Grade L7 Bolts Manufacturer in India.

Sumit Impex is a well known manufacturer of ASTM A320 Grade L7 Fasteners. They follow all the industrial standards and guidelines along with the rules and regulations that are required in order to produce a high quality product. The chemical composition contains nickel along with chromium as well as titanium and vanadium. These make them resistant towards acidic corrosion.

These ASTM A320 Grade L7 Fasteners could be available in different shapes, sizes as well as dimensions depending upon the users specifications and needs as well as the requirement of the product. Because of all the properties that these ASTM A320 Grade L7 Fasteners have, they are used in a large number of industrial applications such as marine engineering, oil and gas industries, etc.

ASTM A320 Grade L7 Fasteners Specifications

Grade ASTM A320 Grade L7
Specification ASTM A 193 ASME SA 193
Standard  DIN, ASTM, BS and all International Standards
Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Length 3 mm to 200 mm
Form Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts.
Application Most commonly used in petroleum refineries, Boilers, Heat exchangers, Condensers, Pipelines, Cooling towers, Steam exhausts, Electric generation plants, On occasion will be found in fertilizer and chemical plants.
Element L7 (AISI 4140) L43 (AISI 4340) B8 (AISI 304) B8M (AISI 316)
Carbon 0.37 – 0.49% 0.38 – 0.43% 0.08% max 0.08% max
Manganese 0.65 – 1.10% 0.75 – 1.00% 2.00% max 2.00% max
Phosphorus, max 0.04% 0.04% 0.05% 0.05%
Sulfur, max 0.04% 0.04% 0.03% 0.03%
Silicon 0.15 – 0.35% 0.15 – 0.35% 1.00% max 1.00% max
Chromium 0.75 – 1.20% 0.70 – 0.90% 18.0 – 20.0% 16.0 – 18.0%
Nickel 1.65 – 2.00% 8.0 – 11.0% 10.0 – 14.0%
Molybdenum 0.15 – 0.25% 0.20 – 0.30% 2.00 – 3.00%
Grade Size Tensile, ksi min Yield, ksi, min Charpy Impact Elong, % min RA, %, min
L7 up to 21/2 125 105 -150° F 16 50
L43 sup a 4 125 105 -150° F 16 50
B8 Class 1 all 75 30 N/A 30 50
B8M Class 1 all 75 30 N/A 30 50
B8 Class 2 Up to 3/4 125 100 N/A 12 35
7/8 – 1 115 80 N/A 15 35
11/8 – 11/4 105 65 N/A 20 35
13/8 – 11/2 100 50 N/A 28 45
B8M Class 2 Up to 3/4 110 95 N/A 15 45
7/8 – 1 100 80 N/A 20 45
11/8 – 11/4 95 65 N/A 25 45
13/8 – 11/2 90 50 N/A

Other Products

ASTM A320 Grade L7 Structural Bolts ASTM A320 Grade L7 Bolt Exporter
ASTM A320 Grade L7 U-Bolts Stockist ASTM A320 Grade L7 Hex Head Bolts Manufacturer
ASTM A320 Grade L7 Lag Bolts A320 Grade L7 Alloy Steel Carriage Bolts
ASTM A320 Grade L7 Alloy Steel Eye Bolts ASTM A320 Grade L7 Bolts Manufacturer
ASTM A320 Gr L7 Hex Headed Bolts ASME A320 Gr L7 AS Elevator Bolts
ASTM A320 Gr L7 Alloy Steel Bolts ASTM A320 Gr L7 Shoulder Bolts

ASTM A320 Grade L7 Fasteners Price List

  • A320 Grade L7 Fasteners
    US $1000-2500 / Ton
  • ASTM A320 Gr L7 Square Bolts
    US $2000-3000 / Ton
  • ASTM A320 Gr L7 Heavy Hex Bolts Exporter
    US $1.5-4.5 / Kilogram
  • ASTM A320 Gr L7 Hex Headed Bolts
    US $1800-2300 / Ton
  • ASTM A320 Grade L7 Structural Bolts
    US $1550-2400 / Ton
  • ASTM A320 Grade L7 U-Bolts Stockist
    US $1800-2300 / Ton
  • A320 Grade L7 Alloy Steel Carriage Bolts
    US $1300-2600 / Metric Ton


We Sumit Impex Metal Ensure the best quality of Packing , because its play important role especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put extraordinary concern regarding packaging.

We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,

  • Boxes and Crates
  • Shrink-wrapped
  • Carton boxes
  • Wooden pallets
  • Wooden boxes
  • Wooden crates

Testings (Destructive, Non Destructive)

  • Mechanical Testing Such as Tensile, Elongation, Reduction of Area
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Positive Material Identification – PMI Testing
  • Chemical Analysis – Spectro Analysis
  • Intergranular Corrosion (IGC) Test
  • Pitting Resistance Test
  • Dye Penetrant Test (DP Test)
  • Micro Test
  • Macro Test
  • Hardness Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Radiography Test
  • Ultra Sonic Test (UT)
  • Eddy Current Testing
  • Impact Test
  • Bend Test

Application Industries

These material are not a single material but the name for a family of corrosion resistant steels. Like many scientific breakthrough the origins of stainless steel lies in a lucky accident. From the smallest part of zipper to the largest building skyscraper, stainless steel is an essential part of modern life.Stainless steel’s strength, resistance to corrosion and low maintenance make it the ideal material for a wide range of applications. It is also has a long life cycle and is 100% recyclable.

  • Construction
  • Bridges
  • Petrochemical Industry
  • Ship Building
  • Engineering
  • General Structural Purposes
  • Offshore and Onshore Services

Stainless Steel Sheet Manufacturers

Country we serve / City we deliver

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