SUS420J2 is a high-grade mirror plastic mold steel, also known as stainless mirror steel. It has the following main properties and characteristics: Excellent Polishing: SUS420J2 has good polishing properties and can achieve a high quality surface finish. This makes it widely used in mold manufacturing, plastic injection and other fields to ensure the aesthetics and fineness of product appearance.
SUS420J2 chemical composition:
Carbon C: 0.26~ 0.35
Silicon Si: ≤ 1.00
Mn: ≤ 1.50
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.040
Chromium Cr: 12.00~ 14.00
Mechanical properties of SUS420J2:
Tensile strength (MPa): quenching and tempering, ≥ 800~ 1000
Conditional yield strength of 0.2 (MPa): quenched and tempered, ≥ 600
Elongation delta 5: quenching and tempering, ≥ 10
Corrosion resistance: SUS420J2 has excellent corrosion resistance and good resistance to some common corrosive media and gases. This makes it suitable for applications that work in harsh environments or require contact with chemicals.
Wear resistance: SUS420J2 is a stainless steel material with good wear resistance, which can maintain good performance in the case of friction, wear and scratch. Therefore, it is often used to make molds and tools that require wear resistance.
Heat treatment stability: SUS420J2 has good heat treatment stability, and its hardness and strength can be improved by appropriate heat treatment processes. This allows it to achieve higher performance requirements in the fields of mold manufacturing and industrial cutting tools.
Machinability: SUS420J2 has good machinability in annealed state and is easy to perform machining operations such as cutting, forging, grinding and stamping. This makes it widely used in die making and tooling.
We also provide forging blanks and CNC precision machining services for our clients, covering industries such as energy, petrochemicals, steel, engineering machinery, plastics, prevention and control, hydraulics, healthcare, and food. Please feel free to send us drawings for inquiries.
Metalworking Services
CNC Machining
Sheet Metal Fabrication
Metal Welding
Metal Cutting
Metal Bending
Metal Punching
Metal Forging
Metal Sheet Rolling
Tube and Plate Drilling
Our heavy-duty forging presses support open-die forging and deformation of large-section forgings, including discs, shafts, blocks, and custom components. This capability enables us to meet the demanding forming requirements of heavy industrial applications.
Heat treatment is a critical step in achieving the mechanical properties required for heavy-duty forgings. Our process capabilities meet the strength, toughness, and structural stability requirements for forged components used under demanding operating conditions.
We offer machining capabilities for large forged shafts and long cylindrical components, supporting both rough and finish machining. This capacity is suitable for stepped shafts, rotor shafts, rollers, and other heavy-duty forged shaft components.
Our machining facilities are capable of handling large ring-shaped forgings and circular parts that require precise turning, face machining, boring, and contour control. This capability is suitable for industrial ring blanks, heavy-duty circular parts, and machined ring forgings.
We offer machining solutions for heavy-duty cylindrical, hollow, and tubular forgings. This capability supports the machining of sleeves, cylinders, and other thick-walled forged components used in pressure vessels, rotating systems, and general industrial applications.
Quality control is integrated into our production process through the inspection and testing of forged and machined parts. Our capabilities help verify the dimensional accuracy, condition, and quality consistency of industrial forgings prior to delivery.
Finished forgings are properly protected and packaged to minimize the risk of damage during storage and transportation. Our packaging methods ensure the safe domestic delivery and export shipment of machined and high-value forged components.
