420 Stainless Steel Sheet

Product Information

Product Introduction

Brand	Mellow
Product	420 Stainless Steel Sheet
Surface Finish	BA, 2B, 4K, 6K, 8K, NO.4, HL, Embossed, Perforated, Pickling white, Polished outside, Polished inside and outside
Technique	Hot Rolled / Cold Rolled
Standard	AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc
Width	500mm/1000mm/1219mm/1250mm/1500mm/1800mm/2000mm/2200mm/2500mm/3000mm/3500mm, or as required
Length	500mm/1000mm/2000mm/2438mm/2500mm/3000mm/6000mm/8000mm—13000mm, or as required
Thickness	0.4/0.5/0.6/0.7/0.8/0.9/1.0/1.2/1.5/2.0/2.5/3.0/4.0/5.0/6.0/8.0/10.0/12.0/14.0/16.0—250mm, or as required
Material	201, 202 301, 302, 303, 303F, 303Cu, 304, 304L, 304H, 304F, 314 321, 316, 316L, 316Ti, 316F, 316LTi 309S, 310, 310S, 904L 409, 410, 416, 420, 430, 430F, 431, 436, 439, 441 317, 317L, 347H, 329, 630, 631, 17-4PH 2205, 2507, 2304, HASTELLOYC-276, C-22, C-2000, MONEL400, 254SMO, 253MA, Inconel1600, Inconel1625 Incoloy800, Incoloy800H, Incoloy825, Incoloy800HT GH3030, GH3039, GH2747
Color	Standard RAL color: Red, Blue, White, Grey, Brick, etc.
Stock Dimension	Cold Rolled: 0.4-6.0mm10002000mm/ 12202440mm/ 12502500mm/ 15003000mm, or as your request Hot Rolled: 3.0-16.0mm12502500mm/ 15003000mm/ 15006000mm/ 18006000mm/ 20006000mm, or as your request Thick Sheet: 6.0mm-80mmwidthlength, as your request Mirror: 0.4-1.5mm10002000mm/ 12192438mm and other customize size workable Hairline: 0.4-1.5mm10002000mm/ 12192438mm and other customize size workable Color Coating: 0.4-1.5mm10002000mm/ 12192438mm and other customize size workable Sandblasting: 0.4-1.5mm10002000mm/ 1219*2438mm and other customize size workable
Service	OEM, Customized processing service, Customized fabrication by drawings
Processing Type	Cutting, Bending, Stamping, Welding, CNC machining

Basic Information
Type: 420 stainless steel is a martensitic stainless steel with hardenable properties.
Implementation standards: AISI, ASTM, etc.
Chemical Composition
Carbon (C): The content is between 0.16%-0.25%. A higher carbon content can make stainless steel obtain higher hardness and strength, but it has a certain effect on corrosion resistance.
Chromium (Cr): The chromium content is usually around 12%-14%, which can form a dense chromium oxide protective film on the steel surface, giving the steel good corrosion resistance.
Manganese (Mn): Generally around 1.00%, which helps to improve the strength of steel and improve processing performance.
Silicon (Si): The content does not exceed 1.00%, mainly acting as a deoxidizer, and can also increase the strength of steel to a certain extent.
Phosphorus (P): The content is usually controlled below 0.040%. Excessive phosphorus will reduce the toughness and corrosion resistance of steel.
Sulfur (S): The content generally does not exceed 0.030%. Sulfur will form sulfide inclusions in steel, which has a certain impact on the quality and performance of the steel.

Performance characteristics
Mechanical properties
High strength and high hardness: After quenching and tempering, the tensile strength can reach more than 600MPa, and the hardness can reach about HRC40-50, which is suitable for manufacturing parts that require high hardness and high strength.
Certain toughness: While having high strength and hardness, it also has certain toughness and can withstand a certain degree of impact load, but the toughness is relatively poor compared to austenitic stainless steel.
Corrosion resistance: It has good corrosion resistance in atmospheric environment, can resist general oxidation and mild corrosion, and has good resistance to water, steam, fresh water, mine water, carbonic acid, etc. However, in some highly corrosive media such as strong acid, strong alkali, seawater and other environments, the corrosion resistance is relatively weak.
Magnetism: As a martensitic stainless steel, 420 has a ferromagnetic crystal structure, can be magnetized in the annealed and hardened state, and is suitable for magnetic clamping.
Hot working performance: good hot working performance, wide forging and rolling temperature range, but slow cooling is required after hot working to avoid stress cracks.
Cold working performance: obvious tendency of cold working hardening, appropriate intermediate annealing is required during cold deformation to eliminate work hardening and restore the plasticity and toughness of steel.
Welding performance: relatively poor welding performance, heat affected zone is prone to hardening and cracking during welding, special welding process measures are required, such as preheating, control of welding parameters, post-weld heat treatment, etc., to ensure the quality of welded joints.
Application field
Tool field: due to its high hardness and wear resistance, it is widely used in the manufacture of various knives, such as kitchen knives, scissors, razors, scalpels, etc.
Mechanical field: suitable for various precision machinery, bearings, bolts, nuts and other parts, can withstand greater pressure and wear.
Automobile field: can be used to manufacture automobile engine parts, bearings, gears, etc., to meet the requirements of automobile parts to withstand greater pressure and wear during operation.
Medical field: It is also widely used in medical devices, such as pliers and needles in surgical instruments. Its good corrosion resistance and biocompatibility ensure the hygiene and safety of medical devices.
Other fields: It can also be used to manufacture electrical, equipment, instruments, meters and other components, as well as some hand tools that require high hardness and certain corrosion resistance.
420 stainless steel has the following main advantages:

Good mechanical properties
High hardness: 420 stainless steel can obtain higher hardness after proper heat treatment. For example, when making knives, its hardness can reach about HRC50. This high hardness makes it perform well in application scenarios such as cutting and puncture, and can maintain the sharpness of the blade for a long time to meet the needs of frequent use.
High strength: It has high tensile strength and can withstand large external forces. Taking mechanical parts as an example, bearings, bolts and other parts made of 420 stainless steel can still maintain their shape and function under high pressure, and will not easily deform or damage, providing guarantee for the stable operation of the machinery.
Certain toughness: Although 420 stainless steel has high hardness and strength, it still has certain toughness. This means that when subjected to impact loads, it will not break immediately like some brittle materials. For example, in some tools or equipment parts that need to withstand occasional collisions, this toughness can prevent the parts from breaking suddenly, thereby extending their service life.

Good corrosion resistance
Corrosion resistance in general environments: In atmospheric environments, fresh water environments, and many weakly corrosive media, 420 stainless steel can form a dense chromium oxide protective film to prevent further corrosion. This makes it widely used in many products in daily life, such as kitchen knives, which can effectively resist corrosion and maintain good appearance and performance when in contact with water, food and other substances.
Tolerance to certain chemicals: It also has a certain resistance to some specific chemicals, such as carbonic acid. In the manufacture of some industrial equipment or containers, if the contact medium is mainly a solution containing carbonic acid, 420 stainless steel can maintain its integrity for a certain period of time, reducing equipment damage and safety hazards caused by corrosion.

Good hot working performance
Wide temperature range processing: The hot working temperature range of 420 stainless steel is relatively wide, which provides convenience for hot working processes such as forging and rolling. Within the appropriate temperature range, the shape of the steel can be effectively changed to meet various complex shape requirements. For example, when manufacturing large mechanical parts, 420 stainless steel blanks can be processed into the required shapes of shafts, gears, etc. through hot processing.
Stable performance after hot processing: After proper cooling treatment, 420 stainless steel after hot processing can obtain stable organizational structure and performance. This helps to ensure that the product will not experience performance degradation or deformation during subsequent use due to problems such as internal stress generated during hot processing.

Advantages of magnetic properties
Convenient magnetic processing and detection: 420 stainless steel is magnetic, which has great advantages in certain processing processes. For example, in mechanical processing, it can be fixed with a magnetic fixture to facilitate drilling, grinding and other operations; in terms of quality inspection, the magnetic detection method can quickly and effectively detect possible defects in the material and ensure product quality.

Wide applicability

Application potential in multiple industries: Due to its various advantages mentioned above, 420 stainless steel has a wide range of applications in tools, machinery, automobiles, medical and other fields. Whether it is manufacturing precision medical equipment, high-load automotive parts, or various knives used in daily life, 420 stainless steel can play its advantages and meet the different needs of different industries.

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