Stainless Steel 309H Plates Manufacturer, Supplier & Exporter in India
One of the most preferred heat-resistant Stainless Steel product available on the market today, Stainless Steel 309H Plates are preferred for applications that need performance under elevated operating conditions. Produced using a high carbon percentage in comparison to Grade 309 stainless steel, these plates provide the additional benefits of exceptional strength during high temperature applications ( creep resistance) and oxidation resistance.
We offer high quality Stainless Steel 309H Plates manufactured under international quality standards and various industry specifications. SS 309H Plates are available in variety of sizes, thickness, finishes and can be cut to specific custom sizes required by various Engineering, Fabrication, Petro Chemical & Power Generation applications.
We deliver the highest quality ASTM A240 309H Plates by undertaking a multitude of quality inspections and tests on the plates for dimensional accuracy, strength of material, and long-lasting performance. We cater to the need of both hot-rolled plates, cold-rolled sheets and fabricatecustomized Stainless Steel 309H Plates as per customer’s specifications.
What is ASTM A240 309H Plate?
The ASTM A240 309H Plate is a chromium-nickel austenitic stainless steel plate for use at elevated temperatures. The increased carbon content of grade 309H provides enhanced creep strength and improved high-temperature deformation characteristics.
The alloy has an approximate composition of 22-24% chromium and 12-15% nickel. This combination of alloys gives resistance to scaling, oxidation and thermal cycling. It is well suited to the operating conditions where high temperatures are an issue when designing the equipment.
Common product forms include:
- SS 309H Plate
- ASTM A240 309H Plate
- UNS S30909 Stainless Steel Plates
- Stainless Steel 309H Cold Rolled Sheet
- ASTM A240 Gr 309H Hot Rolled Plates
- 309H Stainless Steel Plate
Key Features of Stainless Steel 309H Plates
Stainless Steel 309H Plates provide several advantages that make them suitable for severe industrial service conditions:
Excellent High-Temperature Strength
The increased carbon content enhances strength and creep resistance during prolonged exposure to elevated temperatures.
Superior Oxidation Resistance
The high chromium content forms a protective oxide layer that prevents scaling and oxidation at elevated temperatures.
Outstanding Corrosion Resistance
Grade 309H offers excellent resistance to oxidation, sulfidation, and various corrosive industrial atmospheres.
Excellent Fabricability
The material can be welded, formed, machined, and fabricated using conventional stainless steel processing techniques.
Long Service Life
Its combination of heat resistance and corrosion resistance significantly extends equipment lifespan and reduces maintenance requirements.
ASTM A240 Stainless Steel 309H Sheets/Plates Types
We offer a comprehensive range of ASTM A240 Stainless Steel 309H Sheets/Plates Types suitable for various industrial applications:
Hot Rolled 309H Plates
Manufactured for heavy-duty industrial applications requiring excellent structural strength and durability.
Cold Rolled 309H Sheets
Produced with superior dimensional accuracy, tighter tolerances, and improved surface finish.
Polished 309H Plates
Ideal for applications requiring enhanced appearance and smooth surface characteristics.
Industrial 309H Plates
Widely used in process industries, thermal plants, and engineering projects.
Custom Cut Plates
Available according to customer specifications for thickness, width, length, and finish.
ASTM A240 Gr 309H Hot Rolled Plates
Specifically designed for high-temperature service and heavy fabrication applications.
Stainless Steel 309H Cold Rolled Sheet
Suitable for precision manufacturing and fabrication projects requiring smooth finishes.
Schedule and Size Chart for 309H SS Plates
| Thickness (mm) | Width (mm) | Length (mm) |
| 3.0 – 6.0 | 1000 – 1500 | 2000 – 6000 |
| 6.1 – 12.0 | 1000 – 2000 | 2000 – 6000 |
| 12.1 – 20.0 | 1000 – 2500 | 2000 – 6000 |
| 20.1 – 50.0 | 1000 – 2500 | 2000 – 6000 |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength | 620 MPa (90 ksi) |
| Yield Strength | 275 MPa (40 ksi) |
| Elongation | 40% |
| Hardness, Rockwell B (HRB) | ≤ 95 |
| Modulus of Elasticity | 200 GPa (29,000 ksi) |
Specifications Chart
| Standard | Specification |
| ASTM | ASTM A240 / A240M |
| ASME | ASME SA240 / SA240M |
| EN | 1.4828 |
| JIS | SUS 309H |
| UNS | S30909 |
Chemical Composition Chart
| Element | Composition (%) |
| Chromium | 22.0 – 24.0 |
| Nickel | 12.0 – 15.0 |
| Carbon | 0.04 – 0.10 |
| Manganese | 2.0 max |
| Silicon | 1.0 max |
| Phosphorus | 0.045 max |
| Sulfur | 0.030 max |
Physical Properties Chart
| Property | Value |
| Density | 7.89 g/cm³ |
| Melting Point | 1400 – 1450 °C (2550 – 2650 °F) |
| Thermal Conductivity | 14.2 W/m·K at 100°C |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity | 0.94 µΩ·m at 20°C |
Plates other Grades in stainless steel :
Applications of Stainless Steel 309H Plates
Due to their exceptional heat-resistant properties, Stainless Steel 309H Plates are extensively used across various industries.
Heat Treatment Industry
Used in furnace linings, heat treatment baskets, and thermal processing equipment.
Petrochemical Industry
Suitable for reactors, heaters, reformers, and processing units exposed to elevated temperatures.
Power Generation Plants
Widely utilized in boilers, superheaters, exhaust systems, and heat recovery units.
Cement Industry
Used in kiln components and equipment exposed to high-temperature environments.
Chemical Processing Plants
Ideal for equipment requiring resistance to oxidation and corrosive process conditions.
Oil & Gas Industry
Applied in thermal processing systems, burners, and high-temperature piping assemblies.
Industrial Furnace Manufacturing
Used extensively in furnace chambers, burners, muffles, and heat shields.
Why Choose Our ASTM A240 309H Plate?
Customers choose us because we focus on quality, consistency, and customer satisfaction.
Strict Quality Control
Every batch undergoes inspection and testing to ensure compliance with ASTM standards.
Wide Size Availability
Available in multiple thicknesses, widths, and lengths.
Competitive Pricing
Cost-effective solutions without compromising material quality.
Custom Processing Services
Cutting, polishing, machining, and custom fabrication support available.
Global Export Capability
Efficient logistics and packaging ensure safe delivery worldwide.
Quality Testing of SS 309H Plate
To guarantee reliability and performance, every SS 309H Plate undergoes various quality tests, including:
- Positive Material Identification (PMI)
- Chemical Analysis Testing
- Mechanical Property Testing
- Hardness Testing
- Ultrasonic Testing
- Dimensional Inspection
- Surface Finish Inspection
- Third-Party Inspection
Frequently Asked Questions (FAQ)
What is the difference between 309 and 309H stainless steel?
309H contains higher carbon content than standard 309 stainless steel, resulting in improved creep resistance and superior high-temperature strength.
Is ASTM A240 309H Plate suitable for high-temperature applications?
Yes. ASTM A240 309H Plate is specifically designed for elevated-temperature service and provides excellent oxidation resistance up to approximately 1093°C.
What industries commonly use UNS S30909 Stainless Steel Plates?
Industries including petrochemical, power generation, furnace manufacturing, oil & gas, chemical processing, and heat treatment extensively use UNS S30909 Stainless Steel Plates.
Are Stainless Steel 309H Cold Rolled Sheets available in custom sizes?
Yes. Cold rolled sheets can be supplied in customized dimensions, thicknesses, and finishes based on project requirements.
Can 309H Stainless Steel Plate be welded?
Yes. 309H stainless steel offers good weldability and can be fabricated using standard stainless steel welding procedures.
Request a Quote for Stainless Steel 309H Plates
Need High-Quality Stainless Steel 309H Plates for your next industrial task? Our experts will help you in choosing suitable ASTM A240 309H Plate, SS 309H Plate, or UNS S30909 Stainless Steel Plates for your task.
Reach us for pricing, technical datasheets, material availability, and customized solutions.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality stainless steel 309H plates. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
