High Tensile Strength Low Alloy Steel Plate
High Tensile Strength Low Alloy Steel Plate
Low alloy steel plates are designed for superior mechanical properties, offering increased strength, toughness, and resistance to corrosion and wear. These plates are manufactured by incorporating small amounts of alloying elements such as chromium, nickel, molybdenum, vanadium, and copper, which enhance their performance under extreme conditions.
Why Choose Low Alloy Steel Plates?
🔹 High Strength-to-Weight Ratio: Provides excellent structural integrity with reduced weight.
🔹 Enhanced Corrosion Resistance: Ideal for harsh environments, reducing maintenance costs.
🔹 Superior Toughness & Hardness: Performs well in high-impact and high-pressure applications.
🔹 Good Weldability & Machinability: Can be easily fabricated and welded for various industrial applications.
Common Standards
ASTM A572
ASTM A656
ASTM A283
EN 10025-6
EN 10149-2
JIS G3106
GOST 19281
Common Grades
- ASTM A572 (Grade 42, 50, 55, 60, 65)
- High strength with good weldability
- Used in bridges, buildings, and heavy equipment
- ASTM A573 (Grade 58, 65, 70)
- Structural quality with enhanced notch toughness
- Ideal for storage tanks and structural applications
- EN 10025-2 (S275, S355, S420, S460)
- European standard HSLA steel
- Used in construction and engineering
Chemical Composition
| S355J2 | S460ML | S460QL | S690QL | |||||
| EN 10025 Part 2 | Typical Analysis | EN 10025 Part 4 | Typical Analysis | EN 10025 Part 6 | Typical Analysis | EN 10025 Part 6 | Typical Analysis | |
| C | ≤0.22 | 0.17 | ≤0.16 | 0.08 | ≤0.20 | 0.15 | ≤ | 0.16 |
| Si | ≤0.55 | 0.45 | ≤0.60 | 0.45 | ≤0.80 | 0.45 | ≤0.80 | 0.30 |
| Mn | ≤1.60 | 1.50 | ≤1.70 | 1.65 | ≤1.70 | 1.50 | ≤1.70 | 1.30 |
| P | ≤0.025 | 0.015 | ≤0.025 | 0.011 | ≤0.020 | 0.012 | ≤0.020 | 0.012 |
| S | ≤0.025 | 0.015 | ≤0.020 | 0.002 | ≤0.010 | 0.005 | ≤0.010 | ≤0.005 |
| Nb | ≤0.05 | <0.04 | ≤0.06 | 0.017 | ≤0.06 | <0.04 | ||
| V | ≤0.12 | ≤0.12 | ≤0.12 | |||||
| Ti | ≤0.05 | ≤0.05 | ≤0.05 | |||||
| Mo | ≤0.20 | ≤0.70 | 0.115 | ≤0.70 | 0.37 | |||
| Ni | ≤0.80 | 0.19 | ≤2.0 | ≤2.0 | 0.15 | |||
| Cu | ≤0.55 | ≤0.55 | 0.17 | ≤0.50 | ≤0.50 | 0.08 | ||
| Cr | ≤0.30 | ≤1.50 | ≤1.50 | 0.40 | ||||
| B | ≤0.0050 | ≤0.0050 | ≤0.003 | |||||
| CE | 0.47 | 0.42 | 0.47 | 0.39 | 0.47 | 0.39 | 0.65 | 0.65 |
| Pcm | 0.26 | 0.19 | 0.19 | 0.29 | ||||
| CET | 0.32 | 0.26 | 0.26 | 0.35 | ||||
Mechanical Properties
| PRODUCT THICKNESS | YIELD STRENGTH MPA (MIN) | TENSILE STRENGTH MPA | ELONGATION % (MIN) |
|---|---|---|---|
| < 16mm | 450 | 570 to 730 | 17 |
| 16 to 50mm | 450 | 570 to 720 | 17 |
| > 50mm | 430 | 570 to 720 | 17 |
Application
1. Construction & Infrastructure
- Bridges, high-rise buildings, and structural frameworks
- Reinforced beams, columns, and support structures
- Road and railway bridge components
- Prefabricated building structures
2. Oil & Gas Industry
- Offshore drilling platforms and rigs
- Storage tanks and pressure vessels
- Pipeline components and processing units
- Heat exchangers and separators
3. Shipbuilding & Marine Industry
- Hull structures and deck components
- Offshore wind turbine foundations
- Port and harbor equipment
- Marine defense vessels and submarines
4. Heavy Machinery & Mining
- Earthmoving and excavation equipment
- Dump truck bodies and wear-resistant parts
- Conveyor systems and crusher plates
- Bulldozers, excavators, and loaders
5. Power Plants & Boilers
- Pressure vessels for high-temperature applications
- Steam boilers and heat recovery systems
- Reactor components in nuclear power plants
- Wind tower structures for renewable energy
6. Automotive & Transportation
- Truck chassis, trailer frames, and load-bearing parts
- Railway carriages, wagons, and tankers
- Armored vehicles and military applications
- Crash barriers and safety components
7. Aerospace & Defense
- Aircraft structural components and reinforcements
- Ballistic protection and armor plates
- Missile launchers and defense structures
- Military-grade vehicle armor
8. Manufacturing & Industrial Equipment
- Pressurized tanks and heat exchangers
- Industrial furnaces and kilns
- Agricultural equipment and plows
- Structural components in robotics and automation
