630 precipitation-hardening stainless steel bar (05Cr17Ni4Cu4Nb) is a martensitic PH stainless steel alloyed with Cu and Nb.
| Element | Content (%) |
|---|---|
| C | ≤0.07 |
| Si | ≤1.00 |
| Mn | ≤1.00 |
| P | ≤0.040 |
| S | ≤0.030 |
| Cr | 15.0–17.5 |
| Ni | 3.0–5.0 |
| Cu | 3.0–5.0 |
| Nb | 0.15–0.45 |
Physical Properties
Density: 7.78 g/cm³
Melting Point: 1400–1440℃, stable at high temperature
Magnetism: Strong magnetic
Mechanical Properties (H900 Condition)
Tensile Strength: ≥1310MPa
Yield Strength: ≥1180MPa
Elongation: ≥10%
Hardness: HRC 40–44
Chemical Properties
Pitting Resistance: In 3.5% NaCl, pitting potential ≥ +200mV
Intergranular Corrosion Resistance: Excellent after solution + aging treatment
Diameter: Cold-drawn 5–80mm (±0.05mm), Hot-rolled 80–200mm (±0.15mm)
Length: Standard 6m (customizable)
Surface Finish: Hot-rolled black (NO.1), cold-drawn bright (Ra≤1.6μm), optional polishing and passivation
Stainless Steel Bar Inventory Racking System
Spectrometer for Alloy Composition Analysis
Finished Stainless Steel Bars on Storage Racks
Palletized Stainless Steel Bars on Workshop Floor
Secured Stainless Steel Bar Bundles for Shipment
Forklift Loading Bundled Stainless Steel Bars into Freight Truck
Engine blades, landing gear components requiring high strength and light weight
Orthopedic implants, surgical tools with excellent biocompatibility and corrosion resistance
Injection mold ejector pins, cores requiring strength and wear resistance
Solution treatment at 1020–1060℃ (water quench), followed by aging (e.g. H900: 470–490℃ air cooling).
Recommended TIG welding with ERNiCrMo-3 filler, clean surfaces, control heat input, interpass temperature <150℃.
Stock: Standard sizes 10–100mm available in stock, 24h delivery
Customization: 7–15 days with mill test certificates and third-party inspection.
Walmay will help match the right stainless product form and specification for your application, confirm quantities and packing needs, and provide requested documents based on order requirements.
