Nickel Alloy 600, also called as Inconel® 600, is nickel-based. It’s a one-of-a-kind nickel-chromium alloy that’s known for its high-temperature oxidation resistance. It has a variety of uses, from cryogenics to applications with extreme temperatures of up to 2000°F (1093°C). Nickel Alloy 600 tubing has high nickel concentration (at least 72%), along with its chromium content, gives a variety of advantages to consumers, including:
4130 is an alloy steel containing chromium and molybdenum. It is popularly known as Chromoly in the commercial market. Typically, the composition includes 0.8 to 1.1% chromium and 0.15 to 0.25% molybdenum with both functioning as strengthening agents. It is considered low-carbon steel. It is exceptional welding steel, which you can weld by most common methods, and machine it at normalized or tempered conditions.
The exact chemical breakdown of 4130 tubing with its specific tolerances include:
- 28 – 0.33% Carbon
- 15 – 0.25% Molybdenum
- 7 – 0.9% Manganese
- 8 – 1.1% Chromium
- ≤ 0.035% Phosphorus
- 15 – 0.35% Silicon
- ≤ 0.04% Sulphur
Why CR And Mo?
Molybdenum has been long-used as a standard alloying element for producing creep-resistant steel that can withstand temperatures of up to 530 °C. When used in high temperatures, it can coagulate and coarsen carbides. Molybdenum is also known to increase the corrosion resistance of 4130 steel. The metallurgical effects of Mo and its ability to work at higher working temperatures with added strength make it highly valuable.
But, continually increasing Mo content can lead to a decrease in creep ductility. Moreover, graphitization takes place above 500 °C, which can cause a drawback in Mo-based steels. However, combining Molybdenum with Chromium helps to yield a valuable solution. Chromium results in exceptional oxidation enable the steel to resist corrosion effectively. It gives the steel good and uniform hardness penetration. The combined benefits of Cr and Mo make Chromoly useful across a wide range of applications.
Properties of 4130 Steel
- Any known commercial methods can be performed to weld AISI 4130 steel.
- You can heat treatment of AISI 4130 at 871°C (1600°F) and then quench it in oil. 4130 steel can be heat-treated at temperatures that range from 899 to 927°C (1650 to 1700°F).
- Hot-working of AISI 4130 steel is done at 816 to 1093°C (1500 to 2000°F).
- One can forge AISI 4130 steel at 954 to 1204°C (1750 to 2200°F).
- Using conventional methods, 4130 steel can be cold worked.
- You can annealit at 843°C (1550°F), and then subject it to air cooling at 482°C (900°F).
- Based on the desired strength level, the tempering process can be performed at 399 to 566°C (750 to 1050°F).
- Using heat treatment or cold working, you can harden AISI 4130 steel.
Why is it called 4130 Steel?
4130 steel acquires its name from specific rules outlined by the AISI and SAE. The first digit designates the steel’s class and its major alloying component (s). The second digit indicated the relative percentage of the given alloying element and any other critical secondary elements within the alloy. The last two numbers identify the carbon concentration in 0.01% increments. 4130 chromium-molybdenum steel is part of the 4xxx and 41xx series.
Uses of Chromoly
In 4130 stainless steel, the added tensile strength and extra corrosion resistance make it suitable for use in an environment with elevated temperature levels. Hence, it is ideal for equipment that operates under high temperatures. It is widely used in automotive, bicycle, and heavy equipment parts. Various industries such as the oil and gas industry, metal production and forming equipment, and others use it to optimize strength and durability. It is also used in manufacturing molds, pins, bicycle tubing, furnace equipment, crankshafts, chain links, drill collars, machine shafts, conveyors, tie rods, and miscellaneous tooling.
These are a few essential properties, compositions, and applications of 4130 steel. The alloy is suitable for high pressure and temperature use and hence is a material of choice for various applications.
Stainless steel is a term that encompasses a group of iron-based alloys containing at least 10.5% chromium by mass. Besides this, the alloy must also have a maximum of 1.2% carbon to be considered stainless. It may also contain elements in requisite amounts such as nickel, manganese, silicon, nitrogen, titanium, molybdenum, niobium, and others which ascribes valuable properties to the alloy. The addition of chromium provides the alloy with its rust-resistant quality. It forms a protective film on the surface, enabling it to prevent corrosion.
The potential uses of stainless steel are endless. It is used across a wide range of industries. Stainless steel is used extensively from the automotive industry to the architectural, medical and pharmaceutical, kitchen, food, and beverage industries. Its valuable properties such as corrosion resistance, durability, temperature resistance, high tensile strength, low maintenance, eco-friendliness, and attractive appearance contribute to its popularity.
Why Stainless Steel Has Various Grades?
In the stainless-steel smelting process, the varying alloy elements present in different quantities will contribute to the performance of this grade of steel. There are various types of stainless-steel grades based on the composition of the alloy. There are five major family groups: austenitic, martensitic, ferritic, duplex, and precipitation hardening stainless steel. Each family group is further classified by grade. 321 stainless steel tube belongs to the 300 series austenitic stainless steel, made of iron, chromium, and nickel. 321 stainless is a titanium stabilized grade that provides excellent intergranular corrosion resistance. The addition of titanium helps to stabilize it against chromium carbide formation.
Besides different grades, stainless steel also comes in varying gauges. Gauges refer to the thickness of the stainless steel metal. The higher the gauge number, the lesser will be the thickness of the material. Hence, metals with higher gauge numbers will be more-thin and vice versa. Choosing the stainless steel product of the correct gauge is crucial to a successful design. For different applications, the gauge of the metal will differ. Making the right choice is essential to ensure the durability of the material. It will also help you avoid structural problems and deformation.
The finish of stainless steel tends to vary from one product to another. Based on the intended use, selecting the right finish option is essential. In projects which emphasize design, an attractive finish is crucial for appeal. In retail products, especially kitchen appliances, stainless steel No. 4 finish is popular in the marketplace. Three more commonly used stainless steel finishing options include:
- 2B – Matte finish: It is a cold-rolled finish, which gives the surface a matte and a slightly reflective appearance. It is generally used for products in which appearance is not crucial.
- 4 – Brushed finish: It has a visible grain and slight reflection. It is suitable for use in architectural, medical, and kitchen applications.
- 8 – Mirror finish: Polishing with high abrasives results in a highly polished, mirror-like surface. It has no visible grain and is applicable in cosmetic products.
The right finish will determine the stainless steel surface’s grain, smoothness, shininess, and appearance.
Various aspects ranging from composition to gauge and surface finishes define the properties of stainless steel. Defining these aspects will help to yield a suitable product for end-use in your industry.
Planning to purchase steel tubes for your business but not sure which is the right choice? Well, 4130 steel tubes are considered one of the best in the industry, especially in aircraft manufacturing. Before you buy 4130 tubing for your business, let us have a look at its benefits.
Steel alloys are generally classified by number according to their composition and tensile strength. The 4130 steel tubes are cold-drawn and standardized with an elasticity of somewhere between 85,000 and 110,000 psi. So it’s extended at room temperature to the ideal strength and thickness inside the reach at which the grade 4130 is applied.