630 Stainless Steel Round Bar

Sunning Steel’s 630 stainless steel round bar (also known as 17-4 PH stainless steel) is a precipitation-hardening martensitic stainless steel that offers an outstanding combination of high strength, excellent corrosion resistance, and superior hardness. With its ability to achieve different mechanical properties through heat treatment, 630 stainless steel is widely used in industries requiring high-performance materials, such as aerospace, marine, chemical processing, and automotive applications.

Product Parameters

Specification	Details
Material Grade	630 (17-4PH)
Standard Compliance	ASTM A564, ASME SA564, AMS 5643, DIN 1.4542
Diameter Range	6mm - 300mm
Length	1000mm - 6000mm (Customizable)
Surface Finish	Black, Bright, Polished, Peeled, Turned, Ground
Heat Treatment	H900, H1025, H1075, H1100, H1150, H1150M
Scope of Application	Aerospace, Marine, Chemical Processing, Energy, Automotive, Medical, Manufacturing

Chemical Composition

Element	Chromium (Cr)	Nickel (Ni)	Copper (Cu)	Carbon (C)	Manganese (Mn)	Silicon (Si)	Phosphorus (P)	Sulfur (S)	Iron (Fe)
Composition (%)	15.0-17.5	3.0-5.0	3.0-5.0	≤ 0.07	≤ 1.00	≤ 1.00	≤ 0.040	≤ 0.030	Balance

Physical Performance

• Density: 7.75 g/cm³
• Melting Point: 1400-1440°C
• Thermal Conductivity: 16.3 W/m·K (at 100°C)
• Electrical Resistivity: 0.80 μΩ·m (at 20°C)
• Magnetism: Magnetic in all conditions

630 Stainless Steel Bars producing Standard

ASTM A564,AMS 5643,EN 10088-3,JIS G4303
ISO 4955

Why Buy 630 Stainless Steel Round Bars from Sunning Steel?

• High-Quality Standards – Manufactured to ASTM, ASME, AMS, DIN, and ISO standards.
• Custom Processing Available – Cutting, polishing, and heat treatment options.
• Competitive Pricing – Best value for high-performance stainless steel.
• Global Supply Network – Fast and reliable worldwide shipping.
• Dedicated Customer Support – Expert advice and technical assistance.