JIS G4303 SUS630, also known as 17-4PH stainless steel, is a precipitation-hardening stainless steel alloy renowned for its excellent combination of high strength, corrosion resistance, and toughness. It offers outstanding mechanical properties and is widely used in various industries requiring robust performance in challenging environments.

Physical Properties:

JIS G4303 SUS630 / 17-4PH stainless steel round bar exhibits a density of approximately 7.8 g/cm³, providing exceptional strength while maintaining a relatively lightweight profile. It has a melting point of around 1390-1440°C and a thermal conductivity of approximately 15.0 W/m·K.

Size Range:

Available in a comprehensive range of sizes, JIS G4303 SUS630 / 17-4PH stainless steel round bar typically spans from 5 mm to 300 mm in diameter, catering to diverse application requirements.

Chemical Composition:

The typical chemical composition of JIS G4303 SUS630 / 17-4PH stainless steel round bar includes:

- Chromium (Cr): 15.0-17.5%

- Nickel (Ni): 3.0-5.0%

- Copper (Cu): 3.0-5.0%

- Manganese (Mn): ≤1.0%

- Silicon (Si): ≤1.0%

- Phosphorus (P): ≤0.040%

- Sulfur (S): ≤0.030%

- Carbon (C): ≤0.07%

- Niobium (Nb) + Tantalum (Ta): 0.15-0.45%

- Iron (Fe): Balance

Mechanical Properties:

- Tensile Strength: ≥1035 MPa

- Yield Strength: ≥930 MPa

- Elongation: ≥16%

These robust mechanical properties ensure excellent performance in demanding applications.

Hardness:

JIS G4303 SUS630 / 17-4PH stainless steel round bar typically exhibits a Rockwell hardness of approximately HRC 36.

Standard Compliance (ASTM A240, JIS G4304):

JIS G4303 SUS630 / 17-4PH stainless steel round bar complies with international standards such as ASTM A240 and JIS G4304, ensuring quality and consistency in production.

Non-Destructive Testing Standard:

Standard non-destructive testing methods, including ultrasonic inspection, are employed to ensure the quality and integrity of JIS G4303 SUS630 / 17-4PH stainless steel round bars.

Corrosion Resistance:

JIS G4303 SUS630 / 17-4PH stainless steel offers excellent corrosion resistance, particularly in harsh environments containing corrosive chemicals and high humidity. It demonstrates high resistance to both general and localized corrosion.

Heat Treatment Condition:

JIS G4303 SUS630 / 17-4PH stainless steel round bar undergoes precipitation hardening treatment to achieve its high strength and hardness characteristics.

Main Applications:

- Aerospace: Used in aircraft components, landing gear, and structural parts.

- Oil and Gas Industry: Employed in drilling equipment, valves, and wellhead components.

- Chemical Processing: Found in pumps, valves, and fittings for handling corrosive fluids.

- Medical Devices: Utilized in surgical instruments, orthopedic implants, and medical tools.

- Marine Engineering: Used in propeller shafts, shafts, and marine hardware.

TJC Steel Supply Case:

TJC Steel (TJC Iron & Steel(Group) Co., Limited) is a leading supplier of JIS G4303 SUS630 / 17-4PH stainless steel round bars, adhering strictly to international standards like ASTM A240 and JIS G4304. They provide reliable solutions for various industries, ensuring the highest quality standards are met.