M4-M64 Alloy B7 round head bolt and washer manufacturer

Grades 7, 7M, 8 and 8M have 8-10% nickel added. Grade 8 material lacks molybdenum, but Grade 8M ASTM A194 2h material contains all the elements mentioned in the composition, making it the strongest and most expensive class of materials in this grade.

Producing Standard
ASME B18.2.2
DIN 934 

The specification for ASTM A320 Grade L7m materials covers alloy steel and stainless steel bolting materials for low temperature applications. ASTM A320 L7 Studs can also be used in applications with ambient temperatures up to -150oF. ASTM A320 grade L7m bolts and ASTM A320 bolts have a minimum Charpy impact value of 15 foot-pounds at this temperature.

ASTM A320 Class L7 fasteners are manufactured using high strength materials ideal for the manufacture of fastener product bolts, studs and bolts that can be used in a wide range of high temperatures in bolting applications.

ASTM A193 Grade B7 specification covers requirements for high tensile alloy steel bolting material for use in high temperature or high-pressure service and other special purpose applications.

El grado B7 es un acero de baja aleacion de cromo molibdeno tratado termicamente con un requisito minimo de resistencia a la traccion de 125 ksi (860 Mpa), un limite elastico de 105 ksi (720 Mpa) y una dureza maxima de 35HRC. Boltport produce pernos con cabeza y sin cabeza B7 a partir de barras de acero aleado AISI 4140 o piezas forjadas.

The material is made up of carbon, manganese, phosphorus, sulfur, silicon, chromium and molybdenum in the composition.

A320 Gr L7 studs are subject to certain mandatory mechanical tests, namely: tensile test, impact test and hardness test.

ASTM A193 Grade B7 is the standard material specification for chromium-molybdenum alloy steel fasteners for high-strength, high-temperature, and special-purpose applications. Grade B7 is a heat treated chromium molybdenum alloy steel with a minimum tensile requirement of 100 ksi, a yield strength of 75 ksi and a maximum hardness of 35 HRC. The ASTM A193 specification covers requirements for chemical composition, mechanical properties, hardness, heat treatment, and recommended nut washers for Class B7 fasteners. ASTM A193 Grade B7 is the broadest specification for fasteners, commonly found in bolts or pipes, pressure vessels, valves, flanges and fittings.

ASTM A194 Class 2h bolts are carbon base steel heavy duty hex nuts. Sa194-2h material is a common high strength nut. This specification ASTM A194 Class 2h washers are typically used in conjunction with the following fastener standards – A193 Class B7, A325, A490.

Alloy Steel AISI 4140 bar stock or forging stock to produce B7 headed and non-headed bolts. A193 Grade B7 is the most commonly used Bolt specification coupled with A194 Grade 2H Nuts for Bolting Carbon Steel pipeline. A193 B7 bolting is available in metric sizes from M6 to M180 and imperial sizes from 1/4 to 7 inches, in diameter.

ASTM A320 L7 washers are specially engineered for LOW temperature performance. These fasteners are commonly used for valves, flanges, fittings, and pressure vessels.

La especificacion ASTM A193 Grado B7 cubre los requisitos para materiales de empernado de acero aleado de alta resistencia para servicio de alta temperatura o alta presion y otras aplicaciones de proposito especial. Es una especificacion estandar que define la composicion quimica tipica, las propiedades mecanicas, los requisitos de dureza, el tratamiento termico preferencial, el marcado del producto, la certificacion y otros requisitos para las conexiones atornilladas utilizadas en el servicio de recipientes a presion, valvulas, bridas y accesorios. ASTM A193 define unidades SI (metricas) y pulgadas-libras.

ASTM A193 Grade B8 Grade 1 Bolts and Studs Made of AISI 304 Stainless Steel. Type 304 is the most commonly used stainless steel grade in the fastener industry.

It is a standard specification defining typical chemical composition, mechanical properties, hardness requirement, preferential heat treatment, product marking, certification and other requirements, suitable for bolting used in pressure vessel service, valves, flanges and fittings. ASTM A193 defines both SI (Metric) and inch-pound units.

L7 threaded studs and short head bolts are readily available in the market.

Carbide solution treatment, also known as solution annealing, is a process in which fasteners or stainless steel rods are heated and then water quenched to ensure maximum corrosion resistance. A193 Grade B8 Grade 2 bolts are strain hardened after carbide solution treatment to improve strength properties and reduce the potential for wear.

Bolts and bolts are used in many applications in almost all industrial applications.

ASTM A320 bolts are suitable for low temperature service down to -150¡ãF and have a minimum Charpy impact value of 20-ft-lbf at this temperature. ASTM A320 Hex Bolts must obtain the durability and service of high temperature or high pressure and corrosion resistant steel. ASTM A320 Stud Bolts are available in different sizes and patterns, our premium ASTM A320 Grade L7 AS Bolts are in high demand in the market due to their speculative properties and specifications.

ASTM A320 Grade L7M bolts and studs are also made from quenched and tempered alloy steel.

ASTM A193 Grade B7 bolts and studs are made from chrome molybdenum steel and are quenched and tempered (heat treated) to achieve the desired mechanical properties (strength). Grade B7 is the most commonly used A193 bolt grade in construction.

ASTM A193 B7 bolts are manufactured to meet numerous specifications and material design properties. More specifically, B7 alloy steel is a high temperature grade of A-193. B7 steel is also a chromium molybdenum steel with a minimum tensile strength of 125ksi.

ASTM A194 Grade 2H bolts are high strength bolts made from carbon steel.

The high lead content in STM A320 grade L7M AS bolts results in relatively low ductility and plasticity.

The term “bolting material” as used in this specification covers, rolled, forged or strain hardened bars, bolts, washers, screws, studs and stud bolts.

A194 2H Heavy Duty Hex bolts are designed for high strength, high temperature or high pressure applications and are usually available in a plain finish.

We offer alloy steel grade 2H washers in various specifications and ranges according to the precise needs and selection of our customers. Alloy Steel Grade 2H Star Washers can be produced in standard sizes or custom made to your specific requirements. Customers can take advantage of what we offer alloy steel grade 2H spring washers at market leading prices.

The ASTM A320 specification, originally approved in 1948, covers alloy steel and stainless steel bolting materials for low temperature service.

Grade 2H nuts are recommended for use with bolts in high-pressure and high-temperature applications. They are made from steel with the following chemical composition: Carbon: 0.4% min; Manganese: 1.0% max; Phosphorus: 0.04% max; Sulfur: 0.05% max; Silicon: 0.40% max. Grade 2H Nuts are heat-treated and have a Core Hardness of Rockwell C24-C38.

Alloy Steel Grade 2H Flat Washers are available in a variety of sizes according to market and customer needs. We play a major role in providing our customers with a high quality range of alloy steel grade 2H lock washers with some great features such as precise dimensions, custom solutions, robustness and more.

The minimum yield and tensile strength requirements for ASTM A193 Grade B7m bolts are reduced compared to Grade B7 bolts. ASTM A193 B7 heavy duty hex bolts are readily available in the market. Therefore, A193-B7 studs are used in many applications due to their easy availability. ASTM A193 B7 Studs are commonly used in pipe flange connections and construction.