Compared with 436 stainless steel, 444 stainless steel has an increased molybdenum content, thereby improving corrosion resistance.
444 stainless steel is a high-alloy ferritic stainless steel. Compared with the commonly used steel SUS430: 1. The chromium content is about 1.0% higher, and the alloying element molybdenum (Mo) is added, so this steel has good resistance to pitting corrosion and cracks. Corrosion and stress corrosion capabilities, its corrosion resistance is even better than SUS304 and SUS316 in some fields.
Specifications | In stock, can be customized according to customer requirements |
Form | Plate, rod, roll, tube, strip, wire |
Classification | Ferritic and martensitic steels |
Grades | Density (20℃) | Specific heat capacity (0~100℃) | Thermal conductivity (100℃) | Resistivity (20℃) | Longitudinal elastic modulus (20℃) | Magnetism |
420 | 7.75 kg/dm³ | 0.46 kg/(kg·K) | 36.9 W/(m·K) | 0.6 Ω·mm²/m | 200 GPa | Yes |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
444 | ≤0.025 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 17.5~19.5 | 1.75~2.5 | ≤1.00 | ≤0.035 |
Grade | Tensile strength (RM/MPa) | Tensile strength (Rp0.2/MPa) | Area shrinkage (Z/%) | Elongation (A/%) | Annealed hardness (HBW) | Hardness HRB | Heating temperature | Heating method |
444 | 410 MPa | 245 MPa | 45% | 20% | ≤ 217, | ≤ 96 | 800~1050℃ | quick cooling |
444 stainless steelis widely used in many fields due to its improved corrosion resistance and other superior material properties, including:
Storage tanks: Due to its excellent corrosion resistance,444 stainless steelis often used to manufacture storage tanks to ensure the safety of stored water quality.
Solar water heater: The heat exchanger in a solar water heater is usually made of 444 stainless steel to withstand the requirements of high temperature and corrosive properties.
Heat exchangers: Heat exchangers require materials that can withstand high temperatures and corrosion, and444 stainless steel provides a reliable solution.
Food Machinery: In the field of food processing and packaging, 444 stainless steel is used to manufacture equipment that comes in contact with food as it is critical to food safety.
The manufacturing process of stainless steel and alloys involves multiple steps to transform raw materials into flat,rectangular sheets or plates made of stainless steel and alloys. Here are a few key steps for stainless steel and alloys:
Molten stainless steel and alloys are cast into large ingots or billets through a casting process.
During the hot rolling process,the thickness of the steel ingot is gradually reduced and elongated to form long strips or coils.
Annealing involves heating stainless steel and alloys to a specific temperature and then slowly cooling it.
Cold rolling is carried out through rolling mills to reduce thickness to meet customer specifications.
Wuxi Walmay Metal Co,Ltd is a comprehensive processing group of Alloy Steel、Forged Parts Fitting、Titanium Alloy、Stainless Steel、Special Welding Wireseries， and more than 800 specifications.
Our group has been engaged in the domestic and global market for more than ten years with rich steel experience and can offer professional advice for customers inapplications with different materials.
Machine cutting
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laser cutting
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Heat treatment and annealing: Wuxi Walmay Metal can heat treat certain 400 series stainless steels.
Material Reliability Identification (PMI): Wuxi Walmay Metal can complete this testing in-house.
Ut Testing: Ultrasonic testing (UT) uses high-frequency sound energy to inspect and measure stainless steel products.
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