Martensitic Stainless Steel
Wuxi xinfutian metal products co., ltd. was established in the 20th century and now is a great manufacturing enterprise that integrates research and development, production, and sales departments. we has several large warehousing bases. we mainly produce stainless steel pipes, plates, coils, rods, pipe fittings, high nickel alloy steel products, high-temperature resistant products, carbon steel, galvanizing products, and also supply OEM&ODM services.
Why Choose US
Our Factory
Our company has a plant area of 5000+ square meters and 20+ product lines. our stocked stainless steel products is about 20000 tons.We have supplied service more than ten years for customers from various regions as africa, europe, and america, etc.
Product Application
All our products are supplied in accordance with DIN/EN, ASTM/ASME, DIN, JIS standards, and our products are widely used in fields such as petrochemical, oil and gas, marine engineering, shipbuilding, boiler heat exchangers, aerospace, environmental protection equipment, mechanical processing, automobiles, hydropower, nuclear power, refrigeration, new energy equipment, etc. at present.
Quality Assurance
Our company has been certified by some internationally renowned certification bodies, and get certifications as ISO9001, TS16949, BVSGS, etc.
Excellent service
If there is a problem with the product, we will take timely measures to solve it. 24 hours online to answer any questions about the product.
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![440C Stainless Steet]()
440C Stainless Steet440C stainless steel is a high-carbon martensitic stainless steel known for its excellent hardness, wear resistance, and moderate corrosion resistance. It is commonly used in applications...read more -
![Ss 410 2mm 3mm 6mm Stainless Steel Round Bar]()
Ss 410 2mm 3mm 6mm Stainless Steel Round Bar410 stainless steel is a martensitic stainless steel alloy known for its high strength, hardness, and corrosion resistance. It offers good ductility in the annealed condition and can be hardened...read more -
![403 Stainless Steel Tube]()
403 Stainless Steel Tube403 stainless steel is a martensitic stainless steel with the Chinese national standard grade of 1Cr12. It contains 1% chromium and 0.01% carbon, and it is magnetic. Its corresponding American...read more -
![420 Stainless Steel Pipe]()
420 Stainless Steel Pipe420 stainless steel is a martensitic stainless steel alloy known for its high corrosion resistance and excellent strength, hardness, and wear resistance. It contains a higher carbon content...read more -
![440C Stainless Steel Sheet]()
440C Stainless Steel Sheet440C stainless steel plate is a martensitic stainless steel with a primary chemical composition that includes approximately 1.2% carbon (C) and 16-18% chromium (Cr), along with trace amounts of...read more -
![630 Stainless Steel Tube]()
630 Stainless Steel Tube630 stainless steel, also known as 17-4PH or S17400, is a precipitation-hardening stainless steel alloy. It offers a unique combination of high strength, excellent corrosion resistance, and good...read more -
![631 Stainless Steel]()
631 Stainless Steel631 stainless steel, also known as 17-7 PH, is a chromium-nickel-aluminum precipitation-hardening stainless steel that possesses high strength and hardness, excellent fatigue properties, good...read more
Types of Martensitic Stainless Steel
Ss 410 2mm 3mm 6mm Stainless Steel Round Bar
410 stainless steel is a martensitic stainless steel alloy known for its high strength, hardness, and corrosion resistance. It offers good ductility in the annealed condition and can be hardened by heat treatment. 410 stainless steel is often used in applications requiring moderate corrosion resistance and high mechanical properties, such as automotive components, cutlery, and industrial equipment.
403 Stainless Steel Tube
403 stainless steel is a martensitic stainless steel with the Chinese national standard grade of 1Cr12. It contains 1% chromium and 0.01% carbon, and it is magnetic. Its corresponding American AISI and ASTM standard grades are S40300 which is a grade of stainless steel produced according to the American ASTM standard.
410 Stainless Steel Sheet
410 stainless steel is a martensitic stainless steel alloy known for its high strength, hardness, and corrosion resistance. It offers good ductility in the annealed condition and can be hardened by heat treatment. 410 stainless steel is often used in applications requiring moderate corrosion resistance and high mechanical properties, such as automotive components, cutlery, and industrial equipment.
420 Stainless Steel Pipe
420 stainless steel is a martensitic stainless steel alloy known for its high corrosion resistance and excellent strength, hardness, and wear resistance. It contains a higher carbon content compared to other stainless steels in the 400 series, making it suitable for applications requiring exceptional strength and abrasion resistance, such as cutlery, surgical instruments, and industrial equipment.
440C Stainless Steel Sheet
440C stainless steel plate is a martensitic stainless steel with a primary chemical composition that includes approximately 1.2% carbon (C) and 16-18% chromium (Cr), along with trace amounts of elements like molybdenum. The high carbon content contributes to its exceptional hardness, while the chromium content provides good corrosion resistance and other desirable properties.
630 Stainless Steel Tube
630 stainless steel, also known as 17-4PH or S17400, is a precipitation-hardening stainless steel alloy. It offers a unique combination of high strength, excellent corrosion resistance, and good toughness. This alloy can be heat-treated to achieve various mechanical properties, making it suitable for a wide range of applications in industries such as aerospace, chemical processing, and oil and gas.
631 Stainless Steel
631 stainless steel, also known as 17-7 PH, is a chromium-nickel-aluminum precipitation-hardening stainless steel that possesses high strength and hardness, excellent fatigue properties, good corrosion resistance, and minimum distortion upon heat treatment.
Advantages of Martensitic Stainless Steel
High hardness and wear resistance
Martensitic stainless steel is known for its high hardness, which makes it ideal for applications that require wear resistance, such as cutlery, knives, and turbine blades.
Good strength-to-weight ratio
The high strength-to-weight ratio of hardenable stainless steel makes it suitable for applications that require strength and durability while minimizing weight.
Excellent machinability
Martensitic stainless steel is easy to machine, making it ideal for applications that require complex shapes and tight tolerances.
Magnetic properties
Unlike other types of stainless steel,hardenable stainless steel is magnetic, which makes it useful in applications that require magnetic properties.
Low cost compared to other stainless steels
Hardenable stainless steel is generally less expensive than other types of stainless steel, making it a cost-effective option for many applications.
Martensetic Stainless Steel Grades
|
Grade |
Equivalent Grade |
Description |
Application |
|
403 |
EN 1.4003 / UNS S40300 |
Martensitic stainless steel with controlled composition and 12% Chromium (Cr), designed for high-stress, high-temperature environments such as turbine components and compressors. |
Steam turbine parts, compressor components, aerospace parts, high-temp blades |
|
410 |
EN 1.4006 / UNS S41000 |
Basic martensitic stainless steel with 12% Chromium (Cr), known for moderate corrosion resistance and good hardness after heat treatment. |
Fasteners, turbine blades, cutlery, valve components |
|
416 |
EN 1.4005 / UNS S41600 |
Free-machining martensitic stainless steel with added Sulfur (S) for improved machinability, but with slightly reduced corrosion resistance and strength. |
Gears, shafts, axles, screws |
|
416Se |
AISI 416Se |
Free-machining martensitic stainless steel with Selenium (Se) for enhanced machinability, providing a smoother surface finish compared to sulfur-based counterparts. |
Screws, bolts, nuts, valve seats |
|
420 |
EN 1.4021 / UNS S42000 |
High Carbon (C) martensitic stainless steel that offers improved strength, hardness, and wear resistance after heat treatment. |
Surgical instruments, cutlery, gears, valve parts |
|
420F |
EN 1.4028 + S / UNS S42020 |
Martensitic stainless steel with added Phosphorus (P) and Sulfur (S) for enhanced machinability, commonly used in high-speed machining applications. |
Machined parts, pumps, valve components, screws |
|
431 |
EN 1.4057 / UNS S43100 |
Martensitic stainless steel with Nickel (Ni) for enhanced corrosion resistance, known for its high strength and toughness, especially in marine environments. |
Aircraft parts, marine bolts, propeller shafts, pump shafts |
|
431F |
AISI 431F |
Free-machining version of 431 with added sulfur or selenium for enhanced machinability. |
Valve components, pump shafts, parts requiring corrosion resistance and machinability. |
|
440A |
EN 1.4109 / UNS S44002 |
Martensitic stainless steel with even lower Carbon (C) than 440B, offering improved toughness and better corrosion resistance, though with reduced hardness. |
Hunting knives, surgical scalpels, ball bearings, cutting tools |
|
440B |
EN 1.4112 / UNS S44003 |
Martensitic stainless steel with slightly lower Carbon (C) than 440C, providing a balance between hardness and improved toughness. |
Knife blades, chisels, industrial valves, cutting tools |
|
440C |
EN 1.4125 / UNS S44004 |
High Carbon (C) martensitic stainless steel providing maximum hardness and wear resistance, with Chromium (Cr) for moderate corrosion resistance. |
Bearings, knives, molds, surgical tools |
|
440F |
EN 1.4104 / AISI 440F |
Free-machining version of 440A with added sulfur for improved machinability. |
Cutlery, surgical tools, knives, applications needing wear resistance and machinability. |
|
422 |
EN 1.4935 / UNS S42200 |
Martensitic stainless steel with added Molybdenum (Mo), Vanadium (V), and Tungsten (W), providing high strength and excellent heat resistance at elevated temperatures. |
Turbine blades, aerospace parts, high-temperature bolts, fasteners |
|
17-4 PH |
EN 1.4542 / UNS S17400 |
Precipitation-hardening stainless steel with a martensitic matrix offering high strength and moderate corrosion resistance. |
Aerospace components, turbine blades, high-performance equipment requiring strength and corrosion resistance. |
Martensitic stainless steels contain 12% to 18% chromium with a relatively high carbon content compared to other stainless steels. These grades of stainless steel are straight chromium with no nickel. They are characterized by high strength, have magnetic properties, acceptable corrosion resistance, and can be hardened through heat treatment. Martensitics are best suited for applications that require hardness, strength, and wear resistance. This grade is in the 400 series, including types 410, 410S, 4141, 416, 420, 431, and 440. General-purpose martensitic stainless steel is listed as grade 410. Grade 420 is used for surgical cutting tools. Martensitic stainless steels are used in cutlery, surgical and dental instruments, springs, scissors, industrial blades, aerospace components, and other general engineering components.
Heat Treatment and How Does Martensitic Structure Form in Stainless Steel
The martensitic structure in stainless steel is formed by heating the steel to form austenite and then rapidly cooling (quenching) it, causing a diffusionless transformation of austenite into hard, brittle martensite.
Here's how it happens:
Heat the steel to a high temperature, typically between 925°C - 1070°C (1700°F - 1950°F). At this temperature:
The steel's structure becomes austenitic, meaning the iron atoms arrange themselves in a face-centered cubic (FCC) lattice.
Carbon atoms dissolve uniformly within this lattice.
After reaching the desired temperature, the steel is rapidly cooled, or quenched, usually in:
Oil
Air
Water
The choice of quenching medium depends on the specific alloy and desired properties.
During quenching:
The rapid cooling prevents carbon atoms from diffusing out of the iron lattice.
As the temperature drops below the martensite start temperature (Ms), typically around 300°C to 400°C (570°F to 750°F), the austenitic FCC structure begins to transform into a body-centered tetragonal (BCT) structure, known as martensite.
The transformation continues as the temperature decreases toward the martensite finish temperature (Mf), which can be below room temperature, sometimes as low as 150°C to 200°C (300°F to 390°F) below the Ms temperature.
This transformation is a diffusionless process, meaning atoms shift positions without long-range diffusion.
To mitigate brittleness:
The steel undergoes tempering, which involves reheating to a lower temperature (typically between 200°C - 600°C).
Tempering allows some lattice stresses to relax and precipitate carbides, enhancing toughness without significantly reducing hardness.
Hardening of Martensitic Stainless Steel
The hardening process consists of two steps. First, the metal undergoes a heat treatment with high temperature. The goal is to achieve an austenitic structure with carbon in a solid solution. The structure changes at a temperature range between 925 and 1070 °C. One of the main influencing factors for the reached strength and hardness is the composition of the material and varies vastly with the carbon content. In particular, it should be noted that the time at the austenitizing temperature has an influence on the hardness of the material. The hardness increases to a maximum and then starts to decrease slowly.
The heat treatment is followed by quenching, while the quenching medium depends on the material and is usually performed with air, oil or water. When the material is cooled below the temperature where martensite begins to transform, the so called MS-temperature, the austenite transforms to martensite. The transformation finishes at around 150 to 200 °C below the MS-temperature, which ranges between 300 and 700 °C.
The MS-temperature depends on the composition of the alloy in metal. While all alloying elements lower the MS-temperature, carbon has the most significant effect. Thus, due to the low temperature which is needed to finish the transformation, highly alloyed martensitic grades contain retained austenite.
Customized Service
We can meet the needs of you with diversified products which can be customized according to your needs.
Pre-Sales Service
● We will answer your questions online 24 hours a day with fast response time to help you choose products.
● We can meet the needs of you with diversified products which can be customized according to your needs.
● Samples are available.
● Certificates of quality are available.
● If you want to visit our factory, we will certainly accompany you and answer your questions.
After-Sale Service
● If there is a problem with the product, we will take timely measures to solve it.
● If there is something wrong with the goods, we will take the way of refund or compensation.
● 24 hours online to answer any questions about the product.
● We will always keep in touch with you and make regular return visits.
FAQ
We're professional martensitic stainless steel manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale bulk martensitic stainless steel in stock here and get free sample from our factory. For price consultation, contact us.
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