SUS440A stainless steel is a martensitic stainless steel with higher hardness than SUS420J2 steel. Its other properties are similar to SUS420J2 steel, but its weldability is poor. SUS 440A stainless steel has high hardness after quenching and good corrosion resistance (magnetic). High hardness and good wear resistance Performance, when sanding, its disadvantages are that it is more sticky and heats up quickly, but it is easier to sand than any carbon steel, and it is much easier to cut materials with a hand saw. The annealing temperature of SUS440A is very low, the hardness usually reaches HRC56-58, and the corrosion resistance and toughness are very strong. It is now more widely used in hand-made knives and factory-made knives.
Specifications | In stock, can be customized according to customer requirements |
Form | Plate, rod, roll, tube, strip, wire |
Classification | Ferritic and martensitic steels |
Type | 440A Stainless Steel Round Bar |
Grade | 201 202,302, 304, 304, 304L, 316, 316L, etc. |
Surface Finish | polish bright black |
Technique | Cold Rolled; Hot Rolled |
Diameter | 3-480mm |
Length | 3000mm, 4000mm,5800mm,6000mm,12000mm, or as required. |
Standard | JIS/SUS/GB/DIN/ASTM/AISI/EN |
MOQ | 1 ton, We can accept sample orders. |
Delivery port: | Shanghai, Tianjin, Qingdao, Ningbo, Guangzhou, etc. |
Packaging Detail | Standard export packaging, various transportation, according to customer needs |
Grade | C | Si | Mo | Cr | Nn | P | S |
440A | 0.60～0.75% | ≤1.00 | ≤0.75% | 16.00～18.00% | ≤1.00% | ≤0.040% | ≤0.030% |
Grade | internal strength N/mm2 | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | HB | ||
| Annealing | Quenching and tempering | ||||
440A | 250 | ≥560 | ≥18 | 255 | ≤259HB | ≥54HRC |
SUS440A stainless steelis usually not used as a welding material and is used to manufacture surgical medical tools.
SUS440A stainless steelis used to manufacture bearing parts that work in corrosive environments and non-lubricated strong oxidation. SUS 440A stainless steel has high hardness after quenching and good corrosion resistance (magnetic).
SUS440A stainless steelis widely used in stainless bearings, tableware (knives), turbine blades, blades, nozzles, valves, rulers, tableware (scissors), etc.
SUS440A stainless steelalso has good high-temperature dimensional stability and can be used to manufacture corrosion-resistant high-temperature bearings and cutting tools whose temperature does not exceed 250°C.
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
Sheet cutting
plasma cutting
Dynamic waterjet cutting
sawing
Plank leveling
polishing
laser cutting
laser cutting
production cutting
Long product cutting
Bar and structural cutting
polishing
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.
Our professional sales team answers your questions within 24 hours.
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