Our Products
We are leaders in the market for providing best range of EN 10025-6 S690QL Plates, ASME SA 387 Gr. 5 Cl. 1 & Cl. 2 Plates, ASME SA 387 Gr. 12 Cl. 1 & Cl. 2 Plates, ASME SA 387 Gr. 22 Cl. 1 & Cl. 2 Plates and ASME SA 387 Gr. 91 Cl. 1 & Cl. 2 Plates
EN 10025-6 S690QL is a high-strength structural steel plate with a minimum yield strength of 690 MPa, designed for heavy-load-bearing applications requiring strength, toughness, and weight efficiency. Supplied in a quenched and tempered condition, S690QL provides excellent impact resistance, formability, and weldability, even at low temperatures.
These plates are used in engineering structures, lifting equipment, bridges, cranes, mining and earthmoving machinery, and offshore platforms, where performance under stress is critical.
Key FeaturesMinimum yield strength: 690 MPa
Excellent strength-to-weight ratio
Good formability and weldability
Guaranteed toughness at -40°C
Ideal for high-load, low-weight structural components
| Grade | S690QL (Q+T) |
| Thickness | 6 mm – 150 mm |
| Width | 1000 mm – 3000 mm |
| Length | 3000 mm – 12000 mm |
| Condition | Quenched and Tempered |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| MOQ | 10 Metric Tons |
| Delivery Time | 7 – 15 Working Days |
| Yield Strength | ≥ 690 MPa |
| Tensile Strength | 770 – 940 MPa |
| Elongation (L0 = 5d) | ≥ 14% |
| Impact Energy | ≥ 27 J at -40°C (Charpy V-notch) |
| 0.20 | 1.70 | 0.80 | 0.020 | 0.010 | 0.50 | 0.70 | 2.00 | 0.005 |
(Actual values vary with plate thickness and origin)
Testing & Quality ControlUltrasonic Testing (UT) – EN 10160
Charpy Impact Test – -40°C guaranteed
Mechanical & Chemical Testing
Hardness Testing
Third-Party Inspection – TUV, DNV, Lloyds, SGS, etc. (on request)
Heavy equipment frames and booms
Mobile cranes and lifting systems
Bridges and high-rise structures
Offshore platforms and modules
Trailer manufacturing and pressure parts (upon qualification)
Mill Test Certificate – EN 10204 3.1 / 3.2
Ultrasonic & Impact Test Reports
Mechanical and Chemical Analysis
Full Traceability and QA/QC documentation
ASME SA 387 Gr. 5 Cl. 1 and Cl. 2 Plates are chrome-moly alloy steel plates designed for high-temperature, pressure vessel, and boiler applications. With a 5% chromium and 0.5% molybdenum composition, these plates offer excellent oxidation resistance, thermal stability, and high-temperature strength.
The main difference between Class 1 and Class 2 is the tensile strength, with Class 2 offering slightly higher strength. These plates are ideal for use in refineries, petrochemical plants, power stations, and heat exchangers.
Key FeaturesExcellent heat and oxidation resistance
Maintains strength at elevated temperatures
Enhanced creep and rupture resistance
Good weldability and formability
Available in normalized and tempered condition
| Grade | Gr. 5 |
| Class | 1 (Cl.1) and 2 (Cl.2) |
| Condition | Normalized and Tempered |
| Chromium Content | 5% |
| Molybdenum Content | 0.5% |
| Thickness | 6 mm – 100 mm |
| Width | 1000 mm – 3000 mm |
| Length | 3000 mm – 12000 mm |
| Surface Finish | Mill / Shot Blasted / Painted |
| Tensile Strength | 415 – 585 MPa | 515 – 690 MPa |
| Yield Strength | ≥ 205 MPa | ≥ 275 MPa |
| Elongation | ≥ 20% | ≥ 20% |
| Impact Toughness | As per ASME requirement | As per ASME requirement |
| 0.15 | 0.60 | 0.50 | 0.025 | 0.025 | 4.00–6.00 | 0.45–0.65 |
Ultrasonic Testing – As per EN 10160 or ASTM A578
Charpy Impact Testing (on request)
Tensile, Yield, and Elongation Testing
Chemical Composition and Hardness Testing
Third-party Inspection – TUV, DNV, SGS, Lloyd’s (on request)
Oil refineries and chemical plants
Pressure vessels and reactors
Heat exchangers and boilers
High-temperature piping and tanks
Power generation and thermal processing units
Mill Test Certificate – EN 10204 3.1 / 3.2
Mechanical and Chemical Test Reports
Heat Treatment Records
Third-party Inspection Reports (if required)
Full Traceability and QA/QC Documentation
Would you like to prepare this in a PDF brochure format, compare Gr.5 with Gr.9 or Gr.11, or add this to a full chrome moly steel catalog? I can assist further.
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.
Key FeaturesExcellent 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
| Grade | Grade 12 |
| Class | Class 1 and Class 2 |
| Alloy Content | Chromium 1%, Molybdenum 0.5% |
| Delivery Condition | Normalized and Tempered |
| Thickness | 6 mm – 100 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| Tensile Strength | 415 – 585 MPa | 515 – 690 MPa |
| Yield Strength | ≥ 205 MPa | ≥ 275 MPa |
| Elongation | ≥ 20% | ≥ 20% |
| Impact Toughness | As per ASME Requirement | As per ASME Requirement |
| 0.20 | 0.60 | 0.50 | 0.025 | 0.025 | 0.80–1.25 | 0.44–0.65 |
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.
Key FeaturesSuperior 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
| Grade | Grade 22 |
| Class | Class 1 and Class 2 |
| Alloy Content | Chromium 2.00–2.50%, Molybdenum 0.87–1.13% |
| Delivery Condition | Normalized and Tempered |
| Thickness | 6 mm – 120 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| Tensile Strength | 415 – 585 MPa | 515 – 690 MPa |
| Yield Strength | ≥ 205 MPa | ≥ 275 MPa |
| Elongation | ≥ 20% | ≥ 20% |
| Impact Toughness | As per ASME Requirement | As per ASME Requirement |
| 0.15 | 0.60 | 0.50 | 0.025 | 0.025 | 1.90–2.60 | 0.87–1.13 |
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 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.
Key FeaturesExceptional 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
| Grade | Grade 91 |
| Class | Class 1 and Class 2 |
| Delivery Condition | Normalized and Tempered (Tempered Martensitic) |
| Thickness | 6 mm – 100 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| Tensile Strength | 585 – 760 MPa | 620 – 795 MPa |
| Yield Strength | ≥ 415 MPa | ≥ 450 MPa |
| Elongation | ≥ 18% | ≥ 18% |
| Impact Toughness | As per ASME Requirement | As per ASME Requirement |
| 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | ≤0.02 | ≤0.01 | 8.0–9.5 | 0.85–1.05 | 0.18–0.25 | 0.06–0.10 | 0.030–0.070 |
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)
Product Overview
BHN 400 Plates, also known as AR 400 (Abrasion Resistant 400) Plates, are wear-resistant steel plates with a nominal Brinell Hardness Number (BHN) of 400. These plates are specifically designed to resist sliding wear, impact, and abrasion in demanding industrial environments.
Ideal for industries such as mining, cement, quarrying, construction, earthmoving, and material handling, BHN 400 plates extend equipment life, reduce maintenance downtime, and improve overall performance in abrasive environments.
Key Features
Nominal hardness: 400 BHN (370–430 BHN range)
High resistance to wear, gouging, and impact
Excellent strength-to-weight ratio
Good formability and weldability (with proper techniques)
Supplied in quenched and tempered condition
Specifications
| Hardness | 370 – 430 BHN |
| Thickness Range | 6 mm – 100 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| Delivery Condition | Quenched and Tempered (Q&T) |
Typical Mechanical Properties
| Yield Strength | ≥ 1000 MPa |
| Tensile Strength | 1250 – 1450 MPa |
| Elongation | 10–12% |
| Impact Toughness | Excellent at -40°C (on request) |
| Hardness | 400 BHN nominal |
Typical Chemical Composition (% Max)
| 0.20 | 1.50 | 0.60 | 1.00 | 0.25 | 0.005 | 0.020 | 0.010 |
Values may vary slightly based on manufacturer
Applications
Earthmoving and mining equipment (buckets, blades, liners)
Dump truck beds and hoppers
Crushers, chutes, and feeders
Construction machinery wear parts
Cement plant equipment and conveyor systems
Screens, shredders, and recycling units
Weldability & Fabrication
Can be welded using standard low-hydrogen electrodes
Preheat and interpass temperature control is advised
Cold forming possible with large radii and slow forming speeds
Cutting via plasma, laser, or waterjet recommended
Certifications & Documentation
Mill Test Certificate – EN 10204 3.1 / 3.2
Hardness and Chemical Analysis Report
Dimensional Tolerance Report
Third-party inspection certificates (optional)
BHN 450 plates are wear-resistant steel plates known for their superior hardness, strength, and impact toughness. Designed for high-abrasion applications in mining, earthmoving, cement, recycling, and material handling industries.
Sizes & DeliveryThickness: 3 mm – 200 mm
Width: up to 4500 mm
Length: up to 18000 mm
Condition: Quenched & Tempered (Q+T)
Edge Finish: Mill edge or custom cut
| Hardness (BHN) | 425 – 475 HBW |
| Yield Strength | 1100 – 1300 MPa |
| Tensile Strength | 1250 – 1450 MPa |
| Elongation (A5) | 10 – 12% |
| Impact Toughness | ≥ 27 J at –40°C |
C: 0.20 – 0.26
Mn: up to 1.6
Si: up to 0.70
Cr / Ni / Mo / B: Present in small controlled amounts
CEV: 0.41 – 0.72 (varies with thickness)
Hardox 450
Raex 450
Quard 450
Sumihard K400 / Brinar 400 / Dillidur 450
Good weldability with proper preheating for thick plates
Suitable for bending, drilling, and cutting using plasma, laser, or oxy-fuel
Use low-hydrogen electrodes for SMAW welding
Supplied with EN 10204 3.1 / 3.2 certificates
Hardness, tensile, impact, and ultrasonic testing as per application
Mining equipment (buckets, dump bodies)
Cement hoppers and chutes
Crushers, screens, and liners
Recyclers and shot-blasting machines
Security and structural wear applications
Product Description:
ROCKHARD 400 Plates are premium-quality abrasion-resistant steel plates manufactured by Jindal India. These plates are designed to offer exceptional hardness, strength, and wear resistance, making them ideal for industries facing extreme mechanical wear conditions.
Key Features:
Specifications:
Applications:
Country of Origin:
India – Manufactured by JINDAL
Mr. Naresh Patel (Diamond Alloys Inc)
1st Floor, Shop No.105,plot No.2879,2881& 2883, Annapurna Sadan, Vitthalbhai Patel Road, C.p.tank Circle,, Girgaon, Mumbai, Maharashtra - 400004, India
https://www.diamondalloysinc.in
Share us via
GST : 27AQCPC2714K1Z4
