630 Stainless Steel Sheet & Plate: Premium Precipitation-Hardening Alloy

Meta Description: Discover 630 stainless steel sheet and plate with exceptional strength, superior fatigue resistance, and outstanding performance in high-stress applications. Available in various thicknesses and finishes.

Introduction

630 stainless steel sheet and plate are premium precipitation-hardening alloys that offer exceptional mechanical properties, making them ideal for high-stress applications where reliability and durability are paramount. Known for their high strength, good corrosion resistance, and superior fatigue resistance, 630 stainless steel sheets are widely used in aerospace, critical industrial equipment, and precision components.

The precipitation-hardening process allows 630 stainless steel to achieve exceptional strength while maintaining good corrosion resistance and machinability. This unique combination of properties makes 630 stainless steel sheets the preferred choice for applications requiring both high mechanical strength and long-term reliability.

Product Overview & Extreme Advantages

Precipitation Hardening: 630 stainless steel sheets can be heat-treated to achieve exceptional strength levels, making them ideal for high-stress applications.
High Strength: With yield strengths up to 1100 MPa after heat treatment, 630 sheets provide superior mechanical performance.
Good Corrosion Resistance: 630 stainless steel offers excellent corrosion resistance comparable to 304 stainless steel, making it suitable for various environments.
Superior Fatigue Resistance: The precipitation-hardening structure provides excellent fatigue resistance, ensuring long-term reliability in cyclic loading applications.
Aerospace Grade Quality: 630 stainless steel sheets meet aerospace standards and are used in critical applications where failure is not an option.
Excellent Machinability: Despite its high strength, 630 stainless steel maintains good machinability in the solution-annealed condition.

Chemical Composition

Element	Percentage (%)
Chromium (Cr)	15.0–17.5
Nickel (Ni)	3.0–5.0
Copper (Cu)	3.0–5.0
Niobium (Nb)	0.15–0.45
Carbon (C)	≤ 0.07
Iron (Fe)	Balance

The 630 stainless steel sheets contain 15.0–17.5% chromium and 3.0–5.0% nickel, providing excellent corrosion resistance. The addition of copper and niobium enables the precipitation-hardening process, which significantly increases strength.

Mechanical Properties

Property	Solution Annealed	H900 Condition	H1025 Condition	H1150 Condition
Yield Strength (MPa)	450	1100	860	725
Ultimate Tensile Strength (MPa)	1035	1310	1170	1000
Elongation (%)	16	10	12	15
Hardness (HRC)	32	40	35	31

630 stainless steel sheets can achieve exceptional strength levels through heat treatment, with yield strengths up to 1100 MPa in the H900 condition. This makes them ideal for applications requiring both high strength and good corrosion resistance.

Heat Treatment

630 stainless steel sheets can be heat-treated to achieve different strength levels:

H900: Aging at 900°F (482°C) for 1 hour, achieving maximum strength
H1025: Aging at 1025°F (552°C) for 4 hours, providing balanced strength and toughness
H1150: Aging at 1150°F (621°C) for 4 hours, offering good strength with improved toughness

630 vs 304 vs 316 vs 17-4PH Comparison

Property	630 Stainless Steel	304 Stainless Steel	316 Stainless Steel	17-4PH Stainless Steel
Yield Strength (MPa)	450–1100	205	205	725–1100
Corrosion Resistance	Good	Excellent	Superior	Good
Heat Treatment	Precipitation hardening	None	None	Precipitation hardening
Fatigue Resistance	Excellent	Good	Good	Excellent
Cost	High	Medium	High	High

630 stainless steel sheets offer superior strength compared to 304 and 316, while maintaining good corrosion resistance. They are comparable to 17-4PH but offer better machinability in the solution-annealed condition.

Available Types & Specifications

Type	Sheet & Plate
Thickness	0.5mm–100mm
Width	Up to 2000mm
Length	Up to 6000mm
Standards	ASTM A564, AMS 5643, UNS S17400
Surface Finishes	2B, BA, No. 4, No. 8, Custom

630 stainless steel sheets are available in various thicknesses from 0.5mm to 100mm, with standard widths up to 2000mm and lengths up to 6000mm. We offer multiple surface finishes to meet specific requirements.

Major Applications

Aerospace components
High-stress structural applications
Critical industrial equipment
Precision components
Oil and gas equipment
Power generation components
Automotive components
Medical devices
Defense applications
Marine equipment

630 stainless steel sheets are used in industries where high strength, reliability, and durability are essential. Their exceptional mechanical properties make them ideal for critical applications where failure is not an option.

Product Images

Hot-rolled 630 stainless steel sheets ready for shipment

Professional infographic 630 stainless steel sheet data sheet + mechanical properties chart

Real-application collage – 630 sheets used in aerospace components, high-stress structural applications, and critical industrial equipment

Why We Are the Best 630 Stainless Steel Sheet Distributor

As the leading global supplier of 630 stainless steel sheets, we provide:

Largest stock of premium 630 sheets for immediate delivery
Direct mill contracts, ensuring the best prices and availability
In-house heat treatment capabilities for custom strength requirements
100% quality testing, ensuring superior quality control
Full certification package with each shipment
Custom cutting & machining to meet your specific needs
Fastest worldwide delivery with unbeatable prices

Packaging & Quality Assurance

We ensure the safe delivery of 630 stainless steel sheets with:

Heavy wooden cases and steel cradles for protection
Protective film to prevent surface damage
Full certification package, including material traceability and test reports

FAQ Section

Q: What is the maximum strength achievable with 630 stainless steel?
A: 630 stainless steel sheets can achieve yield strengths up to 1100 MPa in the H900 condition.

Q: Is 630 stainless steel magnetic?
A: Yes, 630 stainless steel is magnetic in all heat-treated conditions.

Q: Can 630 stainless steel be welded?
A: Yes, 630 stainless steel is weldable, but it requires proper preheat and post-weld heat treatment to maintain properties.

Q: What is the difference between 630 and 17-4PH?
A: 630 and 17-4PH are essentially the same alloy (UNS S17400), with 630 being the newer designation.

Q: What heat treatment is recommended for maximum strength?
A: H900 condition (aging at 900°F for 1 hour) provides maximum strength for 630 stainless steel sheets.

Conclusion + Urgent Call-to-Action

For instant quotes on 630 stainless steel sheets, contact us 24/7 via WhatsApp, email, phone, or live chat. Trust the best supplier for your high-strength sheet needs.

630 Stainless Steel Plate: High-Strength, Corrosion-Resistant Solution for Critical Applications

Meta Description: Discover 630 stainless steel plate with superior strength, corrosion resistance, and high-fatigue resistance. Ideal for aerospace, oil & gas, and medical applications.

Introduction

630 Stainless Steel Plate is a precipitation-hardening alloy that delivers an exceptional balance of high strength (up to 1300 MPa) and corrosion resistance, making it the ideal material for demanding applications in industries such as aerospace, oil & gas, and medical devices. Known for its martensitic structure, 630 stainless steel provides excellent fatigue resistance and can achieve hardness levels up to 44 HRC in its hardened condition.

What sets 630 stainless steel plate apart is its unique ability to undergo precipitation hardening — a heat treatment process that enhances its mechanical properties without compromising its corrosion resistance. This feature makes it highly suitable for high-pressure applications, structural components, and fasteners that require a combination of strength, resistance to wear, and durability.

Compared to other commonly used grades like 304 and 316 stainless steel, 630 provides superior strength-to-weight ratios and is far more effective in high-stress environments. Whether you need plates for turbine components, high-pressure pumps, or downhole tools, 630 stainless steel plate offers the performance and durability required by the most demanding industries.

At [Your Company Name], we are the global No.1 630 stainless steel plate supplier, offering high-quality plates with rapid delivery and competitive prices.

Product Overview & Superior Advantages

High Strength (Up to 1300 MPa): The 630 stainless steel plate offers exceptional strength for high-pressure and high-stress applications.
Corrosion Resistance: Compared to grades like 17-4PH, 630 stainless steel offers superior resistance to corrosion, particularly in chloride and sour service environments.
Fatigue Resistance: Its high fatigue resistance makes it ideal for dynamic applications such as turbine casings, high-pressure pumps, and hydraulic systems.
Machinability: In its annealed condition, 630 stainless steel plate offers excellent machinability, allowing for custom cutting and fast turnaround times.
Versatile Applications: Available in various thicknesses and finishes, it is suitable for a wide range of applications, from aerospace structural components to oil & gas equipment.

Detailed Advantages:

Strength-to-Weight Ratio: 630 stainless steel plate offers an outstanding strength-to-weight ratio, making it highly effective in applications requiring a combination of strength and lightweight materials.
Weldability and Formability: In its annealed condition, 630 stainless steel plate is highly weldable and can be formed into custom shapes, allowing for a wide variety of applications.
Toughness and Durability: Even in extreme environments, 630 stainless steel plate maintains excellent toughness, ensuring long-lasting performance in industries like oil & gas and nuclear power.
Global Certifications: All our plates come with full certifications, including EN 10204 3.1/3.2, PED, and NACE MR0175, ensuring compliance with global standards for quality and performance.

Chemical Composition

Element	Percentage (%)
Chromium (Cr)	15–17.5
Nickel (Ni)	3–5
Copper (Cu)	3–5
Niobium + Tantalum (Nb + Ta)	0.15–0.45
Manganese (Mn)	≤ 1.0
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.04
Sulfur (S)	≤ 0.03

630 stainless steel plate (UNS S17400) consists primarily of chromium, nickel, and copper, with niobium and tantalum added to enhance precipitation hardening. This composition gives 630 stainless steel its impressive corrosion resistance, high strength, and durability, making it perfect for high-performance applications.

Mechanical Properties

Condition	Yield Strength (MPa)	Ultimate Tensile Strength (MPa)	Elongation (%)	Hardness (HRC)
Solution Annealed	850	1050	25	30–35
H900	900	1150	20	35–40
H925	925	1200	15	38–42
H1025	1025	1250	12	40–44
H1150	1150	1300	8	42–46

The 630 stainless steel plate exhibits impressive mechanical properties, including yield strengths up to 1300 MPa in its hardened state. This makes it ideal for demanding applications where strength and toughness are essential.

Physical Properties

Property	Value
Density (g/cm³)	7.75
Thermal Conductivity (W/m·K)	16.3
Magnetic (after hardening)	Yes

With a density of 7.75 g/cm³, 630 stainless steel plate has a thermal conductivity of 16.3 W/m·K, suitable for applications that require thermal management. Additionally, it remains magnetic after hardening, making it suitable for specific magnetic applications.

630 vs 17-4PH vs 304 vs 316 vs 410 Plate Comparison

Property	630 Stainless Steel Plate	17-4PH Stainless Steel Plate	304 Stainless Steel Plate	316 Stainless Steel Plate	410 Stainless Steel Plate
Yield Strength (MPa)	1300	1300	250	290	550
Corrosion Resistance	Excellent	Excellent	Good	Excellent	Moderate
Hardness (HRC)	28–44	38–44	20–30	25–35	30–40
Heat Treatment	H900, H925, H1025, H1150	H900, H925	Annealed	Annealed	Annealed
Cost	Moderate	Moderate	Low	High	Low

630 stainless steel plate outperforms 304 and 316 in terms of strength and corrosion resistance while offering comparable performance to 17-4PH but at a more competitive price point.

Available Specifications

Thickness (mm)	Width (mm)	Length (mm)	Finish
3–100	1000–3000	Up to 12000	No.1 Hot-Rolled, Pickled, 2B, Polished, Brushed

630 stainless steel plate is available in a wide range of thicknesses and finishes to suit various industrial applications, including hot-rolled, pickled, polished, and brushed finishes.

Heat Treatment & Precipitation Hardening Guide

The precipitation hardening process for 630 stainless steel plate involves solution annealing at 1038°C, followed by aging at H900, H925, H1025, and H1150, achieving hardness levels ranging from 28–44 HRC.

Major Applications

Oil & Gas: Wellhead plates, downhole tool plates, pump & valve bodies
Aerospace: Structural plates, aircraft components
Medical: Surgical tools, medical instrument components
High-Pressure Systems: Pressure vessel shells, hydraulic fittings
Nuclear: Reactor components, turbine casings

Exactly THREE Image Placeholders with Strong SEO Alt Text

Image 1: Polished 630 stainless steel plate in H900 condition stacked in warehouse
Image 2: Professional infographic 630 stainless steel plate data sheet + strength vs aging temperature curve
Image 3: Real-installation collage – 630 plates used in oil & gas Christmas trees, pump shafts, aerospace brackets, and high-pressure valve bodies

Why We Are the Best 630 Stainless Steel Plate Distributor

Largest Stock: We carry the largest inventory of 630 stainless steel plates in



all conditions and sizes.

* **Direct Mill Relationships**: Benefit from our **direct relationships** with **top manufacturers**, ensuring **quick delivery** and **competitive pricing**.
* **Custom Solutions**: **Precision cutting**, **beveling**, and **custom machining** available.
* **Quality Assurance**: 100% **PMI**, **ultrasonic**, and **hardness testing** for all plates.

## Packaging & Quality Standards

All **630 stainless steel plates** are securely packaged in **export-grade wooden crates**, with **plastic wrapping** to protect the surface. Each order comes with a **full certification package**.

## FAQ Section

1. **What is the maximum hardness of 630 stainless steel plate?**
2. **Is 630 stainless steel plate magnetic after hardening?**
3. **630 vs 17-4PH differences (they are the same grade)**
4. **Can 630 plate be welded and what filler?**
5. **Recommended condition for maximum strength (H900)**
6. **Corrosion resistance in chloride or sour service environments**
7. **NACE MR0175 / ISO 15156 compliance**
8. **Minimum order quantity**
9. **Lead time for H900 condition 630 plate**
10. **Can 630 plate be polished to mirror finish?**
11. **Is 630 plate suitable for cryogenic applications?**
12. **Typical applications in oil & gas**

## Conclusion + Urgent Call-to-Action

For premium **630 stainless steel plates** with **superior performance** and **unmatched quality**, contact us now. Get an **instant quote** within **1 hour**. **24/7 customer support** via **WhatsApp**, **WeChat**, **email**, **phone**, or **live chat**.

**Request your quote today** and experience the **best in stainless steel plate solutions**.