Low Alloy High Strength Plate
Low Alloy High Strength Plate (HSLA) offers superior strength-to-weight ratio with excellent weldability and corrosion resistance. Available in yield strengths 290-655 MPa, these plates are ideal for automotive, construction, and bridge applications where weight reduction and durability are critical.
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Low Alloy High Strength Steel Plates (HSLA) represent advanced engineering materials that deliver exceptional mechanical properties and enhanced corrosion resistance compared to conventional carbon steels. These plates are specifically designed to meet precise mechanical property requirements rather than fixed chemical compositions, making them ideal for demanding structural applications where performance and reliability are paramount.
Key Characteristics & Advantages:
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Superior Strength-to-Weight Ratio: HSLA plates are 20-30% lighter than carbon steel with equivalent strength, enabling more efficient and economical structural designs
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Enhanced Mechanical Properties: Yield strengths ranging from 290 MPa to 655 MPa (42,000-95,000 psi) with excellent impact toughness and fatigue resistance
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Improved Corrosion Resistance: Alloying elements including copper, nickel, and chromium provide superior rust resistance compared to standard carbon steels
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Excellent Weldability & Formability: Controlled carbon content (0.05-0.25%) ensures good welding characteristics and formability despite higher strength
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Microstructural Advantages: Fine dispersion of alloy carbides in pure ferrite matrix eliminates toughness-reducing pearlite while maintaining strength through grain refinement
Chemical Composition & Grades:
HSLA steels feature carefully balanced alloying elements:
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Carbon: 0.05-0.25% for formability and weldability
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Manganese: Up to 2.0% for strength enhancement
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Strengthening Elements: Niobium, vanadium, titanium for grain refinement and precipitation strengthening
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Corrosion Resistance: Copper, silicon, nickel, chromium for improved environmental durability
Common SAE Grades & Mechanical Properties:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Key Applications |
|---|---|---|---|
| 945X | 310 | 414 | General construction, automotive frames |
| 950X | 345 | 448 | Building structures, equipment manufacturing |
| 965X | 448 | 552 | Heavy equipment, mining machinery |
| 980X | 552 | 655 | High-performance automotive, special structures |
International Standards Compliance:
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Chinese Standards: GB/T 1591-2018, GB/T 3274-2017
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American Standards: ASTM A572/A572M-18, ASTM A709/A709M-18, ASTM A514/A514M-18
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British Standards: BS EN 10025-2, BS EN 10025-6, BS EN 10149-2
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Japanese Standards: JIS G3101, JIS G3106, JIS G3114
Dimensional Specifications (GB/T Standards):
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Thickness: 3mm to 200mm
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Width: 900mm to 4,800mm
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Length: 3,000mm to 27,000mm
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Weight Range: 1.5 to 25 tons per plate
Primary Applications:
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Automotive Industry: Chassis components, frame rails, safety structures requiring high strength with weight reduction
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Construction & Infrastructure: Building frameworks, support structures, bridges with enhanced load-bearing capacity
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Heavy Equipment: Crane booms, mining equipment, agricultural machinery requiring durability and impact resistance
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Transportation: Truck trailers, railway cars, container manufacturing where weight savings are critical
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Special Structures: Roller coasters, transmission towers, industrial plants requiring corrosion resistance
SAE HSLA steel grade compositions
| Grade | % Carbon (max) | % Manganese (max) | % Phosphorus (max) | % Sulfur (max) | % Silicon (max) | Notes |
|---|---|---|---|---|---|---|
| 942X | 0.21 | 1.35 | 0.04 | 0.05 | 0.90 | Niobium or vanadium treated |
| 945A | 0.15 | 1.00 | 0.04 | 0.05 | 0.90 | |
| 945C | 0.23 | 1.40 | 0.04 | 0.05 | 0.90 | |
| 945X | 0.22 | 1.35 | 0.04 | 0.05 | 0.90 | Niobium or vanadium treated |
| 950A | 0.15 | 1.30 | 0.04 | 0.05 | 0.90 | |
| 950B | 0.22 | 1.30 | 0.04 | 0.05 | 0.90 | |
| 950C | 0.25 | 1.60 | 0.04 | 0.05 | 0.90 | |
| 950D | 0.15 | 1.00 | 0.15 | 0.05 | 0.90 | |
| 950X | 0.23 | 1.35 | 0.04 | 0.05 | 0.90 | Niobium or vanadium treated |
| 955X | 0.25 | 1.35 | 0.04 | 0.05 | 0.90 | Niobium, vanadium, or nitrogen treated |
| 960X | 0.26 | 1.45 | 0.04 | 0.05 | 0.90 | Niobium, vanadium, or nitrogen treated |
| 965X | 0.26 | 1.45 | 0.04 | 0.05 | 0.90 | Niobium, vanadium, or nitrogen treated |
| 970X | 0.26 | 1.65 | 0.04 | 0.05 | 0.90 | Niobium, vanadium, or nitrogen treated |
| 980X | 0.26 | 1.65 | 0.04 | 0.05 | 0.90 | Niobium, vanadium, or nitrogen treated |
SAE HSLA sleel grade mechanical properties
| Grade | Form | Yield strength (min) [psi (MPa)] | Ultimate tensile strength (min) [psi (MPa)] |
|---|---|---|---|
| 942X | Plates, shapes & bars up to 4 in. | 42,000 (290) | 60,000 (414) |
| Sheet & strip | 45,000 (310) | 60,000 (414) | |
| 945A, C | Plates, shapes & bars: 0–0.5 in. | 45,000 (310) | 65,000 (448) |
| Plates, shapes & bars: 0.5–1.5 in. | 42,000 (290) | 62,000 (427) | |
| Plates, shapes & bars: 1.5–3 in. | 40,000 (276) | 62,000 (427) | |
| 945X | Sheet, strip, plates, shapes & bars up to 1.5 in. | 45,000 (310) | 60,000 (414) |
| Sheet & strip | 50,000 (345) | 70,000 (483) | |
| 950A, B, C, D | Sheet & strip | 50,000 (345) | 70,000 (483) |
| Plates, shapes & bars: 0–0.5 in. | 50,000 (345) | 70,000 (483) | |
| Plates, shapes & bars: 0.5–1.5 in. | 45,000 (310) | 67,000 (462) | |
| Plates, shapes & bars: 1.5–3 in. | 42,000 (290) | 63,000 (434) | |
| 950X | Sheet, strip, plates, shapes & bars up to 1.5 in. | 50,000 (345) | 65,000 (448) |
| 955X | Sheet, strip, plates, shapes & bars up to 1.5 in. | 55,000 (379) | 70,000 (483) |
| 960X | Sheet, strip, plates, shapes & bars up to 1.5 in. | 60,000 (414) | 75,000 (517) |
| 965X | Sheet, strip, plates, shapes & bars up to 0.75 in. | 65,000 (448) | 80,000 (552) |
| 970X | Sheet, strip, plates, shapes & bars up to 0.75 in. | 70,000 (483) | 85,000 (586) |
| 980X | Sheet, strip & plates up to 0.375 in. | 80,000 (552) | 95,000 (655) |
Manufacturing & Fabrication:
HSLA steel plates typically require 25-30% more forming power compared to carbon steels but offer excellent welding characteristics with proper procedures. The materials exhibit minimal directional properties when treated for sulfide inclusion shape control, ensuring consistent performance in multi-axial loading conditions.
Our Low Alloy High Strength Plates undergo rigorous quality control including chemical analysis, mechanical testing, and dimensional verification to ensure compliance with international standards and customer specifications.
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1.Q: What products do you offer for purchase?
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A: Our packaging methods are determined based on customer needs and product characteristics. Generally speaking, we will customize the packaging according to the customer’s requirements to meet the customer’s needs. At the same time, we will also choose suitable packaging methods based on the characteristics of the product and transportation requirements to ensure that the product will not be damaged or deformed during transportation. Our packaging materials and methods comply with international standards to ensure product quality and safety.
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Our company can provide you with the following services:
Product selection and consulting: We can provide professional steel selection and consulting services based on your needs and project requirements to ensure that you choose the right steel product.
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Inventory management: We have a large inventory of steel products to meet your immediate needs, and we also provide inventory management services to ensure that your inventory can be replenished and adjusted in a timely manner.
Fast delivery: We cooperate with multiple logistics companies to ensure that steel products are delivered to your designated location in a timely and safe manner, helping you complete your project on time.
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