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631 stainless steel, also known as SUS 631 or 17-7PH, is a type of stainless steel that is hardened through precipitation. It was developed from 18-8CrNi, an austenitic stainless steel, and has an unstable eat austenite structure after undergoing a solution . This makes it ductile and easy to process. After adjusting the components through precipitation and carbonization, it undergoes martensite transformation treatment to achieve a low-carbon tempered martensite structure with improved toughness. temperatures. Additionally, it has better corrosion resistance than most martensitic stainless steels.
631 stainless steel is commonly used in the manufacturing of high-strength springs, bearings, high-pressure gas cylinders, aircraft parts, and spacecraft parts, among others.
Element% | C | Si | Mn | P | S | Cr | Ni | Al |
min | - | - | - | - | - | 16 | 6.5 | 0.75 |
max | 0.09 | 1 | 1 | 0.035 | 0.03 | 18 | 7.7 | 1.5 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Hardness | |||
≥1035 MPa | ≥930 MPa | ≥10% | 30-32 HRC |
Note: These values are approximate
Property | Value |
Density | 7.85 g/cm³ |
Melting point | 1398-1446°C |
Coefficient of thermal expansion | 16.5 μm/m-K |
Thermal conductivity | 16.3 W/m-K |
Specific heat capacity | 475 J/kg-K |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
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630 stainless steel is also known as 17-4PH stainless steel, It is a precipitation hardening stainless steel.
630 stainless steel is extremely strong and tough, especially at high temperatures. It also has good corrosion resistance, especially in corrosive environments such as seawater. After proper heat treatment, 630 stainless steel can obtain a tensile strength as high as 1100MPa and a high yield strength.
Because 630 stainless steel has good mechanical properties and corrosion resistance, it is widely used in aviation, aerospace, petrochemical, pharmaceutical, food processing and other fields.
Element% | C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
min | 0.07 | - | - | - | - | 15 | 3 | 3 | - |
max | 0.15 | 1 | 1 | 0.04 | 0.03 | 17 | 5 | 5 | 0.3 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Impact toughness | |||
1100-1350 MPa | 1000-1250 MPa | 8-15% | 50-60 J |
Note: These values are approximate
Property | Value |
Density | 7.8 g/cm³ |
Melting Point | 1398℃ |
Coefficient of Thermal Expansion | 11.7×10^-6/℃ |
Thermal Conductivity | 14.6 W/(m·K) |
Specific Heat Capacity | 477 J/(kg·K) |
Electrical Resistivity | 72 μΩ·cm |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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440F stainless steel is a type of martensitic stainless steel that boasts high carbon and chromium content, resulting in exceptional strength, hardness, and resistance to wear, corrosion, and high temperatures. Due to its outstanding properties, it is a favored material for creating parts that require robust hardness and corrosion resistance, such as valves, bearings, and blades. Furthermore, this stainless steel is straightforward to machine, making it a popular choice in the manufacturing industry. With a maximum hardness of approximately 60 HRC, 440F stainless steel is considered an exceptionally hard material.
Element% | C | Si | Mn | P | S | Cr | Mo | Ni |
min | 0.95 | - | - | - | - | 16 | - | - |
max | 1.2 | 1 | 1 | 0.04 | 0.03 | 18 | 0.75 | 0.5 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Hardness | |||
1170-1310 MPa | 1050-1180 MPa | 10-20% | 57-60 HRC |
Note: These values are approximate
Property | Value |
Density | 7.7 g/cm³ |
Coefficient of thermal expansion | 10.4 x 10^-6 /K (20-100°C) |
Thermal conductivity | 24 W/(m·K) (100°C) |
Specific heat capacity | 460 J/(kg·K) (0-100°C) |
Electrical resistivity | 0.60 x 10^-6 Ω·m |
Magnetic properties | High magnetic permeability, |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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440C stainless steel is a high-grade martensitic stainless steel commonly used in the manufacture of highly wear-resistant mechanical parts such as high-quality knives and bearings. It is a member of the 400 series of stainless steels and is ideal for high-performance knives due to its high hardness, high corrosion resistance, and high toughness.
Specifically, 440C stainless steel is mainly composed of elements such as carbon, chromium and molybdenum, among which the carbon content is as high as 0.95%, which makes it have extremely high hardness and wear resistance. At the same time, the chromium element makes it extremely resistant to corrosion and can be used in various harsh environments. Molybdenum contributes to the corrosion resistance and toughness of the alloy.
Element% | C | Si | Mn | P | S | Cr | Mo |
min | 0.95 | - | - | - | - | 16 | - |
max | 1.2 | 1 | 1 | 0.04 | 0.03 | 18 | 0.75 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Hardness | |||
1700-1900 MPa | 1300-1500 MPa | 2-10% | 58-62HRC |
Note: These values are approximate
Property | Value |
Density | 7.75 g/cm³ |
Melting Point | 1480-1530°C |
Coefficient of Thermal Expansion | 10.4×10⁻⁶/°C |
Thermal Conductivity | 24 W/(m·K) |
Electrical Resistivity | 60-70 nΩ·m |
Magnetic Permeability | 1.25×10⁻⁶ H/m |
Specific Heat Capacity | 460 J/(kg·K) |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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440B stainless steel is a type of martensitic stainless steel that is often used in various applications that require high hardness, toughness, and corrosion resistance.
440B stainless steel is also commonly used in the manufacture of bearings, valves, and other components that require excellent resistance to wear, fatigue, and corrosion.
Compared to SUS440A steel, 440B stainless steel has a higher hardness. On the other hand, 440B stainless steel has a higher toughness than SUS440C steel.
Element% | C | Si | Mn | P | S | Cr | Mo |
min | 0.75 | - | - | - | - | 16 | - |
max | 0.95 | 1 | 1 | 0.04 | 0.03 | 18 | 0.75 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Hardness | |||
1310-1450 MPa | 1140-1240 MPa | 8-14% | 58-60 HRC |
Note: These values are approximate
Property | Value |
Density | 7.7 g/cm³ |
Thermal Expansion Coefficient | 10.4 x 10^-6 /K (20-100 °C) |
Thermal Conductivity | 24 W/(m·K) |
Specific Heat Capacity | 460 J/(kg·K) |
Electrical Resistivity | 0.60 x 10^-6 Ω·m |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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440A stainless steel is a martensitic stainless steel that is known for its high chromium content, which gives it excellent corrosion resistance in harsh environments. It is often used in the manufacture of bearing parts that are exposed to corrosive environments and do not require lubrication.
In addition to its excellent corrosion resistance and hardness, 440A stainless steel also has good high-temperature dimensional stability. This means that it can maintain its shape and size even when exposed to high temperatures, which makes it suitable for use in high-temperature applications such as furnace parts and cutting tools.
Element% | C | Si | Mn | P | S | Cr | Mo |
min | 0.6 | - | - | - | - | 16 | - |
max | 0.75 | 1 | 1 | 0.04 | 0.03 | 18 | 0.75 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | Hardness | |||
760-1310 MPa | 590-1140 MPa | 10-25% | 55-57 HRC |
Note: These values are approximate
Property | Value |
Density | 7.75 g/cm³ |
Melting Point | 1371-1508 ℃ |
Coefficient of Thermal Expansion | 10.4 × 10^-6/K |
Thermal Conductivity | 24.2 W/mK |
Specific Heat Capacity (0-100℃) | 0.16 J/(g·K) |
Magnetism | Can be magnetized |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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431 stainless steel is a high hardness, high strength martensitic stainless steel. The corrosion resistance and mechanical strength of 431 stainless steel can be improved by adding molybdenum and chromium. This stainless steel has excellent mechanical properties, grinding and wear resistance, and has good corrosion resistance and heat treatment performance. Therefore, it is often used in the manufacture of high-strength, high wear-resistant parts, such as bearings, valves, threads, bolts and connections. In addition, 431 stainless steel is also suitable for the manufacture of high wear-resistant knives, molds and clamps. It should be noted that the welding performance of 431 stainless steel is poor, so it is necessary to handle it carefully and choose suitable welding materials when welding.
Element% | C | Si | Mn | P | S | Cr | Ni |
min | - | - | - | - | - | 15 | 1.25 |
max | 0.2 | 1 | 1 | 0.04 | 0.03 | 17 | 2.5 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | |||
≥690 MPa | ≥345 MPa | ≥20% |
Note: These values are approximate
Property | Value |
Density | 7.8 g/cm³ |
Elastic modulus | 200 GPa |
Thermal expansion coefficient | 10.4 × 10^-6/K |
Thermal conductivity | 24 W/(m·K) |
Magnetic | Yes, can be magnetic depending on processing |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
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SUS420F is a kind of stainless steel, also known as 420F stainless steel, which is a kind of martensitic stainless steel. It is a steel alloyed by elements such as chromium and molybdenum, which has high hardness and strength, and also has certain corrosion resistance.
SUS420F stainless steel is mainly used in the manufacture of knives, instruments, valves, bearings, pumps and pneumatic components. It has good processing performance, easy to cut and shape, and can be processed into various shapes. In addition, SUS420F stainless steel also has high magnetic permeability, which can be applied to the manufacture of electronic equipment and motors.
It should be noted that the welding performance of SUS420F stainless steel is poor, and appropriate welding processes and measures should be taken. In addition, it is not suitable for use in high temperature or strong corrosive environment.
Element% | C | Si | Mn | P | S | Cr | Ni | Mo |
min | 0.26 | - | - | - | 0.15 | 12 | - | - |
max | 0.4 | 1 | 1.25 | 0.06 | - | 14 | 0.6 | 0.6 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | |||
≥700 MPa | ≥460 MPa | ≥15% |
Note: These values are approximate
Property | Value |
Density | 7.7 g/cm³ |
Melting Point | 1450-1520℃ |
Coefficient of Thermal Expansion | 11.5 × 10^-6 / ℃ |
Thermal Conductivity | 24.9 W/(m·K) |
Electrical Conductivity | 25.2 × 10^6 / (Ω·m) |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
Looking forward to your inquiry!
SUS420J2 is a stainless steel material, which is a type of martensitic stainless steel. Has high hardness and wear resistance. This material is often used in the manufacture of high hardness, high strength and corrosion-resistant mechanical parts such as knives, molds, bearings and valves.
The heat treatment of SUS420J2 stainless steel can be achieved by quenching and tempering to obtain the best properties and hardness. When the material is tempered at 150-370 degrees Celsius, it can obtain excellent corrosion resistance and toughness. However, when processing SUS420J2 at high temperature, care should be taken to avoid overheating and rapid cooling to avoid oxidation and deformation of the material. Its corrosion resistance is not as good as other stainless steel materials such as AISI 304 or 316.
Element% | C | Si | Mn | P | S | Cr | Ni |
min | 0.26 | - | - | - | - | 12 | - |
max | 0.4 | 1 | 1 | 0.04 | 0.03 | 14 | 1 |
Note: These values are approximate
Tensile strength | Yield strength | Elongation | |||
≥650 MPa | ≥440 MPa | ≥18% |
Note: These values are approximate
Property | Value |
Density | 7.75 g/cm³ |
Melting Point | 1450-1510℃ |
Coefficient of Thermal Expansion | 11.2 x 10^-6/K (20-100℃) |
Thermal Conductivity | 24.9 W/(m·K) (100℃) |
Electrical Resistivity | 0.60 μΩ·m (20℃) |
Note: These values are approximate
Our company: Hengqiao(Shanghai) International Trading Limited
As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Coil/Tube/Pipe/Sheet/Strip/wire/Bar/Channel
Austenitic type
Ferritic type
Martensitic type
Looking forward to your inquiry!