630 Stainless Steel Pipe: High-Strength, Corrosion-Resistant Precipitation-Hardening Steel
Meta Description: Discover the 630 stainless steel pipe for demanding applications. Offers up to 1300 MPa strength and excellent corrosion resistance, ideal for oil & gas, aerospace, and high-pressure applications.
Introduction
630 Stainless Steel Pipe (UNS S17400) is a precipitation-hardening stainless steel that combines exceptional strength and corrosion resistance to deliver reliable performance in extreme environments. With a yield strength of up to 1300 MPa, 630 stainless steel pipe is an ideal material for high-pressure applications, oil & gas downhole tubing, aerospace structural components, and high-strength fasteners. Whether you need seamless or welded pipes, 630 stainless steel pipe offers the versatility and durability needed for demanding industries.
The 630 stainless steel pipe is known for its high fatigue resistance, machinability in the annealed condition, and resistance to general and localized corrosion. This makes it particularly valuable in industries where safety, performance, and reliability are paramount. Whether used in pump shafts, valve bodies, or turbine casings, 630 stainless steel pipe can handle extreme pressure and harsh environmental conditions, including exposure to chlorides, sulfur compounds, and high temperatures.
As one of the most trusted 630 stainless steel pipe suppliers, we ensure that our pipes meet the highest standards of quality and performance. With precipitation-hardening capabilities, 630 stainless steel pipe can be heat-treated to achieve a range of mechanical properties, making it suitable for a variety of applications from aerospace to petrochemical processing.
Product Overview & Superior Advantages
- High Strength: Achieves up to 1300 MPa yield strength in H1150M condition, making it perfect for high-pressure and high-performance applications.
- Excellent Corrosion Resistance: Resists corrosion in chloride-rich environments, seawater, and sulfur-containing compounds, ensuring long-term durability.
- Fatigue Resistance: Designed to withstand cyclical stresses, ideal for components subjected to vibration and repeated loading.
- Machinability: Easy to machine in its annealed condition, reducing production time and costs.
- Versatility: Available in seamless and welded configurations, with a range of sizes and wall thicknesses.
- Precipitation Hardening: Adjust mechanical properties through heat treatment to meet specific application requirements.
Detailed Advantages:
- High-Performance in Critical Applications: With a high yield strength and exceptional fatigue resistance, 630 stainless steel pipe is ideal for industries requiring robust materials, such as aerospace, medical, and oil & gas.
- Superior Corrosion Resistance: The addition of copper (3–5%) and chromium (15–17.5%) makes 630 stainless steel pipe highly resistant to corrosion, particularly in chloride environments, making it suitable for marine and petrochemical applications.
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 15–17.5 |
| Nickel (Ni) | 3–5 |
| Copper (Cu) | 3–5 |
| Niobium (Nb) + Tantalum (Ta) | 0.15–0.45 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤ 0.07 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
630 stainless steel pipe is primarily composed of chromium (15–17.5%) and nickel (3–5%), which provide excellent strength and corrosion resistance. The addition of copper enhances the material’s precipitation-hardening capabilities, while niobium and tantalum improve strength and resistance to high-temperature creep.
Mechanical Properties
| Condition | Yield Strength (MPa) | Ultimate Tensile Strength (MPa) | Elongation (%) | Hardness (HRC) |
|---|---|---|---|---|
| Solution Annealed | 550 | 850 | 20 | 25–30 |
| H900 | 900 | 1100 | 10 | 38–42 |
| H925 | 925 | 1150 | 8 | 39–43 |
| H1025 | 1025 | 1200 | 6 | 40–44 |
| H1150 | 1150 | 1250 | 4 | 42–46 |
| H1150M | 1150 | 1300 | 3 | 44–48 |
630 stainless steel pipe exhibits outstanding mechanical properties across various conditions. In the H900 condition, it achieves a yield strength of 900 MPa, which is ideal for applications requiring both strength and ductility. For maximum hardness, the H1150M condition achieves up to 1300 MPa yield strength and 48 HRC hardness, making it suitable for the most demanding applications.
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 7.80 |
| Thermal Conductivity (W/m·K) | 16.0 |
| Specific Heat (J/kg·K) | 460 |
| Electrical Resistivity (Ω·cm) | 0.00074 |
| Magnetic (after hardening) | Yes |
With a density of 7.80 g/cm³ and moderate thermal conductivity of 16 W/m·K, 630 stainless steel pipe is suitable for high-temperature applications. After hardening, the material becomes magnetic, which may be relevant for certain industrial applications.
630 vs 17-4PH vs 304 vs 316 vs 410 Pipe Comparison
| Property | 630 Stainless Steel Pipe | 17-4PH Stainless Steel Pipe | 304 Stainless Steel Pipe | 316 Stainless Steel Pipe | 410 Stainless Steel Pipe |
|---|---|---|---|---|---|
| Yield Strength (MPa) | 1300 | 1100 | 250 | 290 | 450 |
| Corrosion Resistance | Excellent | Excellent | Good | Excellent | Moderate |
| Hardness (HRC) | 38–48 | 38–44 | 20–30 | 25–35 | 35–45 |
| Heat Treatment | H900, H925, H1150 | H950, H900 | Annealed | Annealed | Annealed |
| Cost | High | Moderate | Low | High | Moderate |
630 stainless steel pipe offers superior strength and corrosion resistance compared to 304 and 316 stainless steel pipes. It outperforms 17-4PH and 410 in terms of both strength and hardness, making it ideal for high-performance and high-pressure environments.
Available Types & Specifications
| Type | Size Range (NPS) | Wall Thickness | Standards | Surface Finish |
|---|---|---|---|---|
| Seamless & Welded | 1/8″–48″ | Sch 5S–XXS | ASTM A312, A358, A376, A213, A269 | Annealed & Pickled, Bright Annealed, Polished |
We offer 630 stainless steel pipe in seamless and welded configurations, with sizes ranging from 1/8″ to 48″ NPS and wall thicknesses from Sch 5S to XXS. Our pipes meet the highest industry standards, including ASTM A312, A358, A376, A213, A269, A511, and EN 10216-5, and are available in a variety of surface finishes such as annealed & pickled, bright annealed, and polished.
Heat Treatment & Precipitation Hardening Guide
630 stainless steel pipe is heat-treated to optimize its mechanical properties. Solution annealing at 1038°C followed by aging treatments such as H900, H925, H1025, and H1150 enhances its strength, with H900 providing the highest balance between strength and ductility. This flexibility in heat treatment makes 630 stainless steel pipe suitable for various applications requiring tailored mechanical properties.
Major Applications
- Oil & Gas Downhole Tubing
- Pump Shafts
- Valve Bodies
- Aerospace Structural Tubing
- Medical Instrument Tubing
- High-Pressure Hydraulic Lines
- Nuclear Reactor Components
- Turbine Casings
- High-Strength Fasteners Tubing
- Petrochemical Processing Lines
630 stainless steel pipe is used extensively in oil & gas exploration, aerospace applications, nuclear reactors, and high-pressure systems due to its superior strength and corrosion resistance. Its versatility also extends to medical tubing and chemical processing lines, where performance and reliability are critical.
Product Images
Hot-rolled 630 stainless steel pipes ready for shipment
Professional infographic 630 stainless steel pipe data sheet + mechanical properties chart
Real-application collage – 630 pipes used in oil & gas downhole tubing, aerospace structural components, and high-pressure systems
Why We Are the Best 630 Stainless Steel Pipe Distributor
As the world’s leading 630 stainless steel pipe supplier, we offer the largest ready stock of 630 pipes in all conditions. Our in-house heat treatment and polishing services ensure that our products meet the highest quality standards. We offer 100% PMI, ultrasonic testing, and hydrostatic testing on all pipes, backed by full EN 10204 3.1/3.2 and PED certificates. With fast global delivery and custom cutting options, we provide unmatched service and the most competitive 630 stainless steel pipe price.
Packaging & Quality Standards
We ensure the highest level of quality and safety during shipping with individual plastic sleeves, wooden crates, end caps, and a full certification package for each order.
FAQ Section
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What is the maximum hardness of 630 stainless steel pipe?
- Up to 48 HRC in the H1150M condition.
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Is 630 stainless steel pipe magnetic after hardening?
- Yes, it becomes magnetic after hardening.
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630 vs 17-4PH differences?
- 630 has higher strength and better corrosion resistance than 17-4PH.
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Can 630 pipe be welded and what filler?
- Yes, 630 pipe can be welded using 17-4PH filler.
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Recommended condition for maximum strength?
- H900 condition is recommended for maximum strength.
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Corrosion resistance in chloride or sour service environments?
- Excellent resistance in chloride and sour environments.
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NACE MR0175 / ISO 15156 compliance?
- Yes, our 630 stainless steel pipes are compliant with NACE MR0175 and ISO 15156.
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Minimum order quantity?
- Please contact us for MOQ details.
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Lead time for Sch 80 seamless 630 pipe?
- Typical lead time is 4–6 weeks.
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Can 630 pipe be polished to a mirror finish?
- Yes, it can be polished to a mirror finish.
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Is 630 pipe suitable for cryogenic applications?
- Yes, 630 stainless steel pipe is suitable for cryogenic environments.
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Typical applications in oil & gas?
- Used for downhole tubing, pump shafts, and valve bodies.
Conclusion + Urgent Call-to-Action
For the best 630 stainless steel pipe price and the most reliable service, contact us now for an instant quote. We offer 24/7 customer support via WhatsApp, WeChat, email, phone, and live chat.