hex nuts

Due to the excellent physical and mechanical properties of Super Duplex, the quality of Super Duplex steel fasteners can meet the high demands of the gas, oil and marine industries.

Duplex 2205 stainless steel (ferritic and austenitic) is widely used in applications requiring good corrosion resistance and strength.

Super duplex steel fasteners have a metallurgical microstructure consisting of a mixture of ferritic and austenitic steels in equal proportions of 50-50.

Duplex UNS S32205 fasteners are widely used in construction and other industrial applications. We offer these types of fasteners in differenut thicknesses and tolerance limits for a variety of industrial applications.

Combining many of the beneficial properties of ferritic and austenitic steels, 2205 is the most widely used duplex grade. Its high chromium and molybdenum conutenut gives stainless steel excellenut corrosion resistance.

The materials used to manufacture the fasteners are of top quality and standard, thus increasing the compatibility of the final product for adverse applications.

Duplex 2205 is a nitrogen enhanced duplex stainless steel designed to solve common corrosion problems encounutered with 300 series stainless steels.

Duplex nuts S31803 also have good fatigue and corrosion resistance in most environmenutal conditions.

UNS S32750 or DIN W.Nr. 1.4410, Duplex 2507 is a super duplex stainless steel conutaining 25% chromium, 4% molybdenum and 7% nickel, designed for demanding applications requiring exceptional strength and corrosion resistance, such as chemical Process, petrochemical and seawater equipmenut.

Duplex stainless steel fasteners are available in Super Duplex, Lean Duplex and Standard Duplex grades, each with specific properties for differenut applications.

2205 is the standard duplex grade and is more economical than most other duplex grades.

Duplex 2205 alloy is composed of high chromium and low or moderate nickel conutenut.

2205 dual-phase steel fasteners have some excellenut mechanical properties, which may be due to the balanced austenitic and ferritic microstructures in the alloy.

2205 Duplex nuts are the most widely used duplex stainless steel 2205 fasteners and feature a high yield strength that is twice that of standard austenitic stainless grades.

Duplex 2205 nuts and nuts are widely used in applications requiring good corrosion resistance and strength in marine and harsh environmenuts.

Duplex 2205 fasteners are made from standard duplex materials. The material consists of carbon, manganese, silicon, phosphorus, 21% chromium, 2.5% molybdenum, 4.5% nickel and nitrogen.

UNS S2750 Super Duplex Fasteners have good weldability and can be joined to itself or other materials by shielded metal arc welding, gas tungsten arc welding, plasma arc welding, flux cored wire or submerged arc welding.

Duplex 2205 is a (two-phase) ferritic-austenitic stainless steel with high strength and excellenut corrosion resistance, with a maximum Brinell hardness of 290 (Rc31) in the annealed condition.

Preheating of UNS S32750 Super Duplex Fasteners is not necessary except to prevent condensation on cold metal.

Thread friction between the nut and bolt creates a strong, steady and even force holding the componenuts together. The most commonly used ASTM A182 UNS S32205 fastener nuts are regular hex nuts. At the same time, duplex stainless steel fasteners are strong and corrosion resistanut, combining the healthy properties of ferrite and austenite. The material also has a 90ksi minimum tensile strength and a 65ksi minimum yield strength. 2205 duplex stainless steel bolts have an elongation of 25% and a hardness of 217HBW.

These grades of super duplex stainless steel fasteners are used when applications require excellent corrosion resistance and strength. Composed of nitrogen, molybdenum and chromium, they have excellent resistance to crevice corrosion and chloride pitting.

A nut is a small metal object with a hole in the middle that has corrugated hole. These curved holes are known as threads. Nuts are used as a fastening device. It is important to note that evens though nuts are used as a fastening device, they cannot be used without bolts. To understand this, we have to understand the shape of walnuts. The outer part of its body can be shaped either way, but it is mostly hexagonal cap or circular in shape.

The nut has internal threads so that it can be tightened easily on the bolt. The size of the nut is smaller than that of the bolt. The nuts experience compression forces. It is compressive stress that leads to its failures. There are different types of nuts: Hex Nut, Nylon Insert Lock Nut, Jam Nut, Nylon Insert Jam Lock Nut, Square Nut, Cap Nut, Acorn Nut, T-Nut, Cape Nut, Castle Nut, Wingnut, Flange Nut, Slotted Nut, Coupling nut, etc. most common type of nut found today is a hexagonal nut.

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.

ASTM A194 2h nuts are available in nominal sizes ranging from ?” to 4″. These products are made with heavy duty hex nuts with different proof load stresses for regular nuts and zinc plated nuts. A194 2h coupling nut with 175ksi plain nut and 150ksi zinc plated nut. Fasteners of this grade of material also have high hardness.

Since these are heavy duty tension nuts, they are used in high vibration and high stress applications such as aircraft engine parts and automotive engine parts. ASTM A194 Class 2h material consists of all classes of carbon, manganese, phosphorus, sulfur and silicon.

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 

Standard ASTM A193 B7 fasteners typically have a common bare metal finish. However, ASTM A193 Grade B7 studs can be galvanized, hot-dip galvanized, xylan coated, teflon coated if requested by the buyer. Coating ASTM A193 B7 fasteners can help improve the corrosion resistance of fasteners. This ASTM A193 Grade B7m bolt is typically used to fasten medium high temperature service materials. These bolts are liquid quenched from 50¡ãF to 900¡ãF and they can be air quenched from -40¡ãF to 900¡ãF.

Hastelloy G30 is a combination of nickel, chromium, iron, cobalt, molybdenum, tungsten and manganese. Hastelloy G30 is primarily used to provide high resistance to chemical conditions. Hastelloy G30 is a high performance alloy with surface stability at high temperatures. In the welded form, the corrosion resistance is also carried over. Hastelloy G30 fasteners are highly ductile. Hastelloy G30 resists deformation at high temperatures. Hastelloy G30 is used in applications requiring high corrosion and deformation resistance. Using cold working, these fasteners are hardened. These fasteners have high oxidation resistance.

HASTELLOY G-30 alloy is a high-chromium nickel-based alloy that exhibits corrosion resistance superior to most other nickel- and iron-based alloys in commercial phosphoric acid and in many complex environments containing highly oxidizing acids such as nitric/hydrochloric acid, Nitric/hydrofluoric and sulfuric acid. The resistance of G-30 alloy to the formation of grain boundary precipitates in the heat affected zone makes it suitable for the as-welded condition in most chemical processing applications.