440 stainless steel sheets,440 stainless steel plates

440 Stainless Steel Sheets and Plates Supplier

  • Thickness:0.05mm – 200mm
  • Width: 600mm – 2000mm, the narrowed products pls check in Strip Products
  • Length: 500mm-12000mm
  • Finish: 2B, 2D, Black, NO.1, Anneal pickling
  • MOQ: 2MT

Product Description

440 stainless steel sheets are high hardness, wear resistance, and high strength stainless steel material with excellent corrosion resistance and mechanical properties that remain stable in extreme environments, as well as high hardness and strength that can withstand high-intensity shock and vibration. Due to its unique material properties, it is widely used to manufacture high-performance parts, tools, and mechanical components.

The surface of this stainless steel sheet undergoes various treatment processes, and different surface treatments such as 2B, 2D, black, NO.1, and annealed pickling are available to meet customers’ needs for appearance quality. In addition, this stainless steel sheet is available in a wide range of thicknesses from 0.1mm to 100mm, which can be customized according to customers’ needs.

Our 440 stainless steel sheet products are produced with high-quality raw materials and have passed several quality certifications to ensure their quality and reliability. As a professional stainless steel supplier, we have a wide range of stainless steel sheets in different specifications and sizes for our customers to choose from and can be customized to meet their special needs to ensure that they meet their requirements. Whether you need high-end tooling materials or manufacturing bearings, molds, etc., our 440 stainless steel sheet is your second choice.

Specification of 440 Stainless Steel Sheets And Plates

440 Grade Description in Different Standard

ISO NameASTMDIN / ENJISGBOther
X105CrMo17440C1.4125SUS440C9Cr18MoUNS S44004

440 Chemical Composition in Different Standard

440C %Si %Mn %P%S%Cr%Ni%Mo%
ASTM 0.95-1.20≤ 1.0≤ 1.0 ≤ 0.04 ≤ 0.03 16.0-18.0≤ 0.75 ≤ 0.75 
JIS 0.95-1.20≤ 1.0≤ 1.0 ≤ 0.04 ≤ 0.03 16.0-18.0≤ 0.60 _
EN0.95-1.20≤ 1.0≤ 1.0 ≤ 0.04 ≤ 0.03 16.0-18.0≤ 0.75 _
GB0.95-1.20≤ 1.0≤ 1.0 ≤ 0.04 ≤ 0.03 16.0-18.0≤ 0.60 ≤ 0.75 

 

440 Mechanical Properties in Different Standard

Mechanical PropertiesT.S.(MPa)Y.S.(MPa)EL.(%)HBHRBHBWHV
440 stainless steel≥ 965≥ 635≥ 12≤ 248≤ 89≤ 260≤ 270

Note: The parameters are for reference only, and the specific parameters should also be based on the data provided by the actual manufacturer.

T.S. stands for tensile strength, Y.S. stands for yield, L. stands for elongation, HB stands for Brinell hardness, HRB stands for Rockwell hardness B, HBW stands for Brinell hardness W, and HV stands for Vickers hardness.

440 Physical Properties in Different Standard

440Density (g/cm³)Melting point (℃) Thermal conductivity (W/m-K) Coefficient of thermal expansion (10^-6/K)
ASTM 7.71480-1530 24.210.4
JIS 7.71370-145024.211
EN7.71360-14302310.8
GB7.71360-14302310.8

Production Process of 440 Stainless Steel Sheets& Plates

Raw Material Preparation

Select appropriate raw materials (usually special steel or high-purity iron alloy) and pretreat them (such as heating, heat treatment, refining, etc.).

Ingot Preparation

The pretreated raw material is poured into an electric arc furnace or other melting equipment, smelted, and refined to obtain high-purity stainless steel liquid metal.

Continuous Casting

The liquid metal is poured into a continuous casting machine and formed into thin or thick plates by rapid cooling. This process usually includes steps such as cutting and surface treatment of the cast slab.

Testing Quality

The finished 440 stainless steel sheet is tested and quality controlled in terms of chemical composition, physical properties, appearance quality, etc. to ensure that the products meet customer requirements and relevant standards.

Finished Product Production

According to the customer’s needs and requirements, the stainless steel plate is cut, processed, bent, welded, drilled, polished and other processing, finally forming a product that meets the customer’s needs.

Hot or Cold Rolling

The slab is processed through a hot or cold rolling mill to form the required thickness and width, along with surface treatment and annealing to ensure the stability of material properties and excellent surface quality.

Features of 440 Stainless Steel Sheets& Plates

440 stainless steel sheets can obtain extremely high hardness after proper heat treatment, which is suitable for making mechanical parts with high strength and high wear resistance requirements.

440 stainless steel sheets contain a high percentage of chromium, which makes it excellent corrosion resistance, especially suitable for working in humid, high-temperature, acidic or alkaline environments.

440 stainless steel sheets can obtain high strength after proper heat treatment, which can be used to manufacture high-strength structural parts.

440 stainless steel sheets have good machinability and plasticity, and can be cold worked, hot worked and welded in a variety of processes.

Due to the high proportion of carbon and chromium elements, 440 stainless steel sheets have excellent wear resistance and is suitable for making high wear parts and tools, etc.

Application of 440 Stainless Steel Sheets& Plates

440 stainless steel sheets hammer

Manufacturing Industry

440 stainless steel sheets and plates can be used to manufacture mechanical parts and tools with high strength and wear resistance requirements, such as hammerheads, hammer handles, screw wrenches, hammers, files, etc.

321 stainless steel strips in chemical industry

Chemical Industry

Because 440 stainless steel sheets and plates have excellent corrosion resistance, they can be used to manufacture chemical equipment and containers, such as storage tanks, reactors, pipelines, valves, etc.

hot rollled stainless steel strips in petrochemical applications

Petroleum Industry

440 stainless steel sheets and plates have the characteristics of high-temperature resistance, corrosion resistance, and high strength, so it is suitable for the high-temperature, high-pressure, and corrosive environment in the petroleum industry, such as seawater pumps, centrifugal pumps, oil pipelines, etc. on the oil extraction platform.

316 stainless steel sheets in food processing equipment

Food Processing Industry

Because 440 stainless steel sheets and plates have high corrosion resistance and good sanitary properties, they can be used for food processing equipment and containers, such as food pressure tanks, heaters, yogurt machines, etc.

304 magnetic stainless steel in Nuclear Magnetic Resonance

Medical Equipment Manufacturing Industry

440 stainless steel sheets and plates can be used for manufacturing medical equipment and surgical tools, such as surgical forceps, scalpels, forceps, etc.

FAQ

440 and 430 stainless steel are two different materials with the following differences between them:

Chemical Composition: 440 stainless steel contains a higher percentage of carbon, chromium and molybdenum, while 430 stainless steel contains a higher percentage of chromium and iron.

Hardness and Wear Resistance: Due to its high percentage of carbon and molybdenum, 440 stainless steel is harder and more resistant to wear than 430 stainless steel.

Corrosion Resistance: Although 440 stainless steel has higher corrosion resistance than 430 stainless steel, their corrosion resistance is still influenced by environmental conditions.

Uses: Due to its higher hardness and wear resistance, 440 stainless steel is typically used to make parts that require high strength and wear resistance such as knives and bearings, while 430 stainless steel is typically used to make products that require higher corrosion resistance such as household appliances and kitchen utensils.

There are significant differences between 440 and 304 stainless steel in terms of chemical composition, physical properties, and application areas, mainly as follows:

Chemical Composition: 440 stainless steel contains higher levels of carbon, chromium, and molybdenum, while 304 stainless steel contains higher levels of chromium and nickel.

Physical Properties: 440 stainless steel is harder and more wear-resistant than 304 stainless steel, but slightly inferior to 304 stainless steel in terms of corrosion resistance and plasticity. In addition, 440 stainless steel is more magnetic, while 304 stainless steel is non-magnetic.

Application Areas: 440 stainless steel is mainly used to make highly wear-resistant, high-strength, and high-rigidity parts, such as tools, bearings, valves, etc.. While 304 stainless steel is widely used to make decorative items, kitchenware, medical equipment, chemical equipment, and other fields.

440 and 316 stainless steel are two different materials with different chemical compositions and physical properties, so there are the following differences between them:

Chemical Composition: 440 stainless steel contains mainly carbon, chromium, molybdenum and steel, while 316 stainless steel contains mainly chromium, nickel, molybdenum and steel.

Corrosion Resistance: 316 stainless steel has better corrosion resistance in chloride environments, while 440 stainless steel is suitable for some applications requiring high strength and hardness, but not high corrosion requirements.

Magnetism: 440 stainless steel is a magnetic stainless steel, while 316 stainless steel is a non-magnetic stainless steel.

Applicable Occasions: 440 stainless steel is suitable for the manufacture of parts and tools requiring high strength and hardness, such as blades and bearings, while 316 stainless steel is suitable for the manufacture of parts and equipment in highly corrosive environments, such as marine equipment and chemical processing equipment.

440 stainless steel is generally not recommended for food contact equipment and utensils because it contains a high percentage of chromium and other alloying elements in its chemical composition that may have a negative impact on food. In contrast, food-compliant types of stainless steel, such as AISI 304 or 316 stainless steel, are widely used in the manufacture of food-contact equipment and utensils.

440 stainless steel sheet has high hardness and strength, making it relatively difficult to machine. Its strength and hardness may lead to faster tool wear, thus requiring the use of more durable cutting tools and stronger machines for machining. In addition, the requirement for high precision and high surface finish requires the use of higher level machines and techniques for processing. In conclusion, 440 stainless steel sheet is difficult to machine and requires special attention to machining parameters and process control.

The service life of 440 stainless steel plate can be affected by a variety of factors, such as the use of the environment, working conditions, maintenance and so on. Generally speaking, if 440 stainless steel plate is properly maintained and cared for, and under normal conditions of use, it can last for decades or even longer. But if the use of extremely harsh environment, such as long-term exposure to strong acids, strong alkalis and other corrosive media, or suffer from severe mechanical shock, etc., the service life will be greatly shortened. Therefore, how to care and maintenance of 440 stainless steel plate is very important to extend its service life.

The following are some suggestions that can extend the life of 440 stainless steel sheets:

Keep it Clean: Cleaning the surface regularly will help prevent corrosion and dirt build-up.

Avoid Scratching Surfaces: Avoid tools and cleaners that can cause surface scratches and damage whenever possible.

Regular Maintenance: Inspect and regularly maintain equipment and piping, and repair or replace worn or damaged parts.

Select the Correct Environment: When using 440 stainless steel sheets, select the proper environment and avoid excessive exposure to high temperatures, high humidity or corrosive environments.

Store Correctly: Proper storage of 440 stainless steel sheets will prevent damage and corrosion. During storage, long-term exposure to moisture and chemicals should be avoided.

Compared to other stainless steel sheets, 440 stainless steel sheet has the following characteristics:

High Hardness: 440 stainless steel sheet has a higher hardness than other stainless steel sheets, so it is more suitable than other stainless steel sheets for applications that require a high degree of wear resistance and corrosion resistance, such as tools and bearings.

Corrosion Resistance: Although 440 stainless steel plate is not as corrosion resistant as 304 and 316 stainless steel plate, it still has good corrosion resistance, especially in dry, low humidity, and low chloride ion environments.

Magnetism: 440 stainless steel sheet is magnetic stainless steel, unlike other stainless steel sheets, which makes it more suitable for applications that require magnetic materials, such as power tools and motors.

Processability: Compared to other stainless steel sheets, 440 stainless steel sheet is more difficult to machine and form, requiring higher processing capabilities and more complex processes.