Alloy Steel

Alloy steel plates are engineered with a combination of alloying elements like chromium, molybdenum, nickel, manganese, vanadium, and boron, which enhance the steel’s mechanical strength, toughness, heat resistance, and corrosion resistance. These plates are widely used in boilers, pressure vessels, heat exchangers, power plants, offshore structures, oil & gas pipelines, mining machinery, and heavy engineering applications.

Available in a wide range of grades and specifications, alloy steel plates offer high performance in elevated temperature and high-pressure environments.

• Excellent high-temperature strength

• Superior corrosion and oxidation resistance

• Enhanced toughness and impact resistance

• Suitable for welding, bending, and forming

• Available in quenched & tempered, normalized, or annealed conditions

• Ultrasonic Testing (UT) – EN 10160 / ASTM A578

• Impact Testing (Charpy V-notch)

• Tensile & Bend Testing

• Chemical & Hardness Testing

• Third-party Inspection – TUV, DNV, Lloyd’s, SGS (upon request)

• Pressure vessels and boilers

• Heat exchangers and refinery tanks

• Steam lines and high-temperature pipelines

• Offshore platforms and petrochemical units

• Mining and earth-moving equipment

• Power generation and thermal plants

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Ultrasonic and Impact Test Reports

• Chemical and Mechanical Test Results

• Third-party inspection certificates

• Full traceability and QA/QC records

ASME SA 387 Gr. 11 Class 1 and Class 2 Plates are 1.25% Chromium – 0.5% Molybdenum alloy steel plates, specifically developed for use in elevated temperature and pressure applications. These plates are widely used in boiler fabrication, pressure vessels, heat exchangers, and refinery and petrochemical plant equipment.

Both Class 1 and Class 2 offer excellent creep resistance, corrosion resistance, and weldability, with Class 2 providing higher tensile strength.

• Excellent oxidation and heat resistance

• Superior mechanical performance at elevated temperatures

• Good weldability and formability

• Available in normalized + tempered condition

• Suitable for refineries, power plants, and chemical process industries

• Ultrasonic Testing – As per ASTM A578 or EN 10160

• Charpy V-Notch Impact Testing – on request

• Mechanical Testing – Tensile, Yield, Elongation

• Chemical Composition & Hardness Testing

• Third-party Inspection – TUV, DNV, Lloyd’s, SGS (optional)

• Pressure vessels and heat exchangers

• Steam boilers and superheater components

• Petrochemical processing equipment

• Power generation and refinery equipment

• High-temperature piping and reactors

• Mill Test Certificate – EN 10204 3.1 / 3.2

• UT Reports, Mechanical and Chemical Test Results

• Charpy Impact Test Reports (if required)

• Third-party inspection certificates (on request)

• Full traceability and QA/QC documentation

ASME SA 387 Grade 12 Class 1 and Class 2 Plates are 1% Chromium – 0.5% Molybdenum alloy steel plates designed for high-temperature and pressure service. These plates are primarily used in boilers, pressure vessels, heat exchangers, oil & gas processing units, and chemical plants due to their outstanding thermal resistance, mechanical strength, and oxidation resistance.

The Class 2 variant offers a higher tensile strength compared to Class 1, while maintaining the same corrosion and creep-resistant properties.

• Excellent strength and stability at elevated temperatures

• High resistance to thermal fatigue and oxidation

• Good weldability and formability

• Supplied in normalized and tempered condition

• Ideal for boiler and pressure vessel applications

• Ultrasonic Testing (UT) – EN 10160 / ASTM A578

• Charpy Impact Test – on request

• Tensile and Yield Testing

• Chemical Analysis and Hardness Testing

• Third-Party Inspection – TUV, DNV, SGS, Lloyd’s available on request

• Steam boilers and superheaters

• Pressure vessels and heat exchangers

• High-temperature piping and tanks

• Petrochemical and refinery units

• Thermal and power generation equipment

• Mill Test Certificates – EN 10204 3.1 / 3.2

• UT and Mechanical Testing Reports

• Impact Test Reports (if applicable)

• Third-party inspection reports

• Full traceability and quality assurance documentation

ASME SA 387 Grade 22 Class 1 and Class 2 Plates are chromium-molybdenum alloy steel plates designed for elevated temperature and pressure service, especially in boilers, heat exchangers, pressure vessels, oil refineries, and chemical plants. With a Cr-Mo composition (2.25% Cr, 1% Mo), these plates exhibit excellent creep resistance, oxidation resistance, and thermal stability.

Class 2 provides higher tensile strength than Class 1 while both offer excellent weldability and durability under harsh working conditions.

• Superior mechanical strength at high temperatures

• Excellent creep and rupture resistance

• Good resistance to oxidation, corrosion, and hydrogen attack

• Available in normalized and tempered condition

• Compatible with welding and forming processes

• Ultrasonic Testing (UT) – As per EN 10160 / ASTM A578

• Charpy Impact Testing – Optional or as per order

• Tensile and Elongation Testing

• Chemical Composition and Hardness Testing

• Third-party Inspection – TUV, SGS, Lloyd’s, DNV (if required)

• High-temperature pressure vessels and reactors

• Steam boilers, economizers, and superheater components

• Heat exchangers and thermal process tanks

• Oil & gas refinery and petrochemical infrastructure

• Power generation and energy sector equipment

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Mechanical & Chemical Test Reports

• Ultrasonic Test Reports

• Heat Treatment Charts and Dimensional Records

• Third-party inspection reports (upon request)

ASME SA 387 Gr. 9 Cl. 1 / Cl. 2 Plates are 9% chromium and 1% molybdenum alloy steel plates designed for elevated temperature and pressure service, especially in power plants, refineries, and petrochemical units. They are known for their superior creep resistance, oxidation resistance, and mechanical strength in high-temperature environments.

The difference between Class 1 and Class 2 lies in tensile strength, with Cl.2 offering higher strength values while retaining similar chemical composition and service characteristics.

• High-temperature oxidation and corrosion resistance

• Excellent thermal stability and creep strength

• Good fabrication, formability, and weldability

• Suitable for boilers, heat exchangers, and pressure vessels

• Delivered in normalized and tempered condition

• Ultrasonic Testing – As per ASTM A578 or EN 10160

• Charpy V-Notch Impact Testing – Available on request

• Tensile, Yield, Elongation Testing

• Chemical Analysis & Hardness Testing

• Third-party Inspection – TUV, DNV, Lloyd’s, SGS (if required)

• High-temperature pressure vessels and reactors

• Steam pipelines and boiler components

• Heat exchangers and refinery equipment

• Thermal power plants and oil & gas plants

• Petrochemical and chemical processing units

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Chemical & Mechanical Property Reports

• Heat Treatment Records

• Ultrasonic Test Report

• Third-party Inspection Certificates (upon request)

ASME SA 387 Grade 91 Class 1 / Class 2 Plates are advanced 9Cr-1Mo-V (chromium-molybdenum-vanadium) alloy steel plates, engineered for elevated temperature and high-pressure applications. These plates are widely used in thermal power plants, nuclear plants, heat recovery steam generators, pressure vessels, and boilers.

Grade 91 is known for its exceptional creep strength, thermal stability, and oxidation resistance, even at temperatures exceeding 600°C. Class 2 offers higher mechanical strength than Class 1, suitable for highly demanding service conditions.

• Exceptional creep and stress rupture resistance

• Outstanding oxidation and corrosion resistance at high temperatures

• High mechanical strength and thermal stability

• Improved microstructure with tempered martensitic properties

• Supplied in normalized, tempered, and tempered-martensitic condition

• Ultrasonic Testing – ASTM A578 / EN 10160

• Charpy Impact Testing – at -20°C or lower on request

• Hardness Testing – Controlled for creep service

• Creep Rupture & Tensile Testing

• Third-party Inspection – TUV, Lloyd 's, DNV, SGS (if required)

• Supercritical and ultra-supercritical boiler components

• High-pressure steam piping systems

• Heat recovery steam generators (HRSG)

• Power plant pressure vessels and headers

• Thermal and nuclear power projects

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Chemical and Mechanical Testing Reports

• Impact, Hardness & UT Test Reports

• Creep data and microstructure evaluation (on request)

• Third-party inspection documentation (if required)