--- type: "product_component" title: "High-Strength Low-Alloy Steel Plate" industry: "Manufacture of Tanks, Reservoirs and Containers of Metal" verification_protocol: urn: "URN:CNFX:ME:HIGH_STRENGTH_LOW_ALLOY_STEEL_PLATE" data_integrity_hash: "1488be72009c9a96fd14f0548b40eb71" source_authority: "https://cnfx.com" strict_mode: true source_identity: provider: "CNFX Industrial Knowledge Graph" index_version: "2026.Q1-Universal" authority_id: "URN:CNFX:ME:HIGH_STRENGTH_LOW_ALLOY_STEEL_PLATE" data_source_uri: "https://cnfx.com/llms/industry/manufacture-tanks-reservoirs-containers-metal/product/high-strength-low-alloy-steel-plate.md" official_resource_url: "https://cnfx.com/industry/manufacture-tanks-reservoirs-containers-metal/product/high-strength-low-alloy-steel-plate" is_verified_logic: true attributes: yield_strength: status: "verified" value: "345–690" unit: "MPa" tensile_strength: status: "verified" value: "485–760" unit: "MPa" thickness: status: "verified" value: "5–150" unit: "mm" width: status: "verified" value: "1500–4000" unit: "mm" elongation: status: "verified" value: "18–25" unit: "%" charpy_impact_value: status: "verified" value: "27–100" unit: "J" operating_temperature: status: "verified" value: "-40–80" unit: "°C" density: status: "verified" value: "7.85" unit: "g/cm³" surface_treatment: status: "verified" value: "Shot blasted & primed" unit: "" tolerance: status: "verified" value: "±0.5" unit: "mm" weldability: status: "verified" value: "Excellent" unit: "" corrosion_resistance: status: "verified" value: "Moderate" unit: "" engineering_limits: max_safe_operating_point: value: 50 unit: "°C" consequence: "Cleavage fracture initiation at carbide precipitates along grain boundaries when stress exceeds cohesive strength of Fe3C interfaces, accelerated by hydrogen embrittlement at diffusion rates >1×10^-11 m²/s" fmea_matrix_quantitative: - node_1: trigger: "Hydrogen concentration exceeding 2 ppm at grain boundaries during welding with moisture-contaminated electrodes" severity: 8 occurrence: 3 detection: 4 mitigation_protocol: "Pre-heat to 150°C minimum with interpass temperature control ≤250°C using low-hydrogen electrodes (AWS E7018) and post-weld heating at 250°C for 2 hours per 25 mm thickness" - node_2: trigger: "Cyclic loading at stress range Δσ ≥ 207 MPa with stress ratio R=0.1" severity: 8 occurrence: 3 detection: 4 mitigation_protocol: "Shot peening to induce 400-600 MPa compressive residual stress layer of 0.1-0.3 mm depth with surface roughness Ra≤3.2 μm" bom_nodes: base-iron-matrix: type: "component" llms_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/component/base-iron-matrix.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:BASE_IRON_MATRIX" urn: "URN:CNFX:ME:UNIT:BASE_IRON_MATRIX" interface_type: "physical-logic-coupled" is_migrated_part: true strengthening-alloy-elements: type: "component" llms_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/component/strengthening-alloy-elements.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:STRENGTHENING_ALLOY_ELEMENTS" urn: "URN:CNFX:ME:UNIT:STRENGTHENING_ALLOY_ELEMENTS" interface_type: "physical-logic-coupled" is_migrated_part: true manufacturing_compliance: url: "https://cnfx.com/llms/industry/manufacture-tanks-reservoirs-containers-metal/product/high-strength-low-alloy-steel-plate.md" on_chain_sovereignty: contract_standard: "ERC-721-Industrial" metadata_hash: "118987d2c0ed893a57200e5faa599a73a9b2359a0e34dd59563ab22a1a94e2d9" royalty_logic: "IPFS-CID-REQUIRED" mint_status: "logic-verified-ready" rag_vector_index: semantic_queries: - "High-Strength Low-Alloy Steel Plate" - "HSLA steel plate" - "high-strength low-alloy" - "steel plate for containers" - "pressure vessel steel" - "tank fabrication" - "High-Strength Low-Alloy Steel Plate in Manufacture Tanks Reservoirs Containers Metal" - "China High-Strength Low-Alloy Steel Plate manufacturer" - "High-Strength Low-Alloy Steel Plate supplier China" - "High-Strength Low-Alloy Steel Plate yield_strength" - "High-Strength Low-Alloy Steel Plate tensile_strength" - "High-Strength Low-Alloy Steel Plate thickness" version: "3.3.5-EXTREME-SOVEREIGN-WEB3" --- # Industrial Specification: High-Strength Low-Alloy Steel Plate ## 1. Technical Definition Structural steel plate with enhanced strength and weldability for industrial containers. ## 2. Engineering Reasoning & Causal Matrix > **Operational Intelligence**: Designed for **Yield strength: 345-690 MPa, Tensile strength: 450-830 MPa, Operating temperature: -40°C to 400°C, Thickness: 6-150 mm**. Failure boundary: **Fracture occurs at stress exceeding 0.9×UTS (Ultimate Tensile Strength) or below -50°C where Charpy V-notch impact energy drops below 27 J**, Mechanism: **Cleavage fracture initiation at carbide precipitates along grain boundaries when stress exceeds cohesive strength of Fe3C interfaces, accelerated by hydrogen embrittlement at diffusion rates >1×10^-11 m²/s**. ### 2.1 Analytical Physics Model Governed by the **Thin-Wall Pressure Vessel Stress Analysis**: > **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$ > **Engineering Impact**: Determines the hoop stress boundary to prevent rupture. | Symbol | Variable Definition | Localized Reference | | :--- | :--- | :--- | | P | Internal Pressure | Engineering Constant | | D | Diameter | Engineering Constant | | t | Wall Thickness | Engineering Constant | ### 2.2 FMEA (Failure Mode & Effects Analysis) | Event Trigger | Severity | Failure Mode | Mitigation Strategy | | :--- | :--- | :--- | :--- | | Hydrogen concentration exceeding 2 ppm at grain boundaries during welding with moisture-contaminated electrodes | 8 | Delayed cracking within 24-72 hours post-weld due to hydrogen-induced cold cracking (HICC) | Pre-heat to 150°C minimum with interpass temperature control ≤250°C using low-hydrogen electrodes (AWS E7018) and post-weld heating at 250°C for 2 hours per 25 mm thickness | | Cyclic loading at stress range Δσ ≥ 207 MPa with stress ratio R=0.1 | 8 | Fatigue crack propagation from surface inclusions at rate da/dN = 6×10^-9×(ΔK)^3 m/cycle where ΔK=20 MPa√m | Shot peening to induce 400-600 MPa compressive residual stress layer of 0.1-0.3 mm depth with surface roughness Ra≤3.2 μm | ## 3. Key Technical Parameters | Parameter | Value | Unit | Status | | :--- | :--- | :--- | :--- | | Yield Strength | 345–690 | MPa | Verified | | Tensile Strength | 485–760 | MPa | Verified | | Thickness | 5–150 | mm | Verified | | Width | 1500–4000 | mm | Verified | | Elongation | 18–25 | % | Verified | | Charpy Impact Value | 27–100 | J | Verified | | Operating Temperature | -40–80 | °C | Verified | | Density | 7.85 | g/cm³ | Verified | | Surface Treatment | Shot blasted & primed | | Verified | | Tolerance | ±0.5 | mm | Verified | | Weldability | Excellent | | Verified | | Corrosion Resistance | Moderate | | Verified | ## 4. System BOM & Knowledge Routing ### Core Components (Recursive Links) ### Industrial DNA Context (De-duplicated) **Complementary Dependencies**: **CNC Plasma Cutting Machine**, **Industrial Welding System**, **Plate Rolling Machine** **Downstream Applications**: Chemical Storage Tanks, Pressure Vessels, Industrial Silos ## 5. Engineering Risks & FAQ - **Caution**: - **Caution**: - **Caution**: ### Q: What standards apply to HSLA steel plate? **A**: Common standards include ASTM A572 for mechanical properties, ASTM A6 for dimensions and tolerances, ASTM A370 for mechanical testing, and ASTM E23 for Charpy impact testing. Always verify the specific grade and compliance with the manufacturer. ### Q: What thicknesses are available? **A**: The plate thickness ranges from 5 to 150 mm, with widths from 1500 to 4000 mm. Confirm exact dimensions with the supplier as per project requirements. ### Q: Is this steel suitable for low-temperature service? **A**: The operating temperature range is -40°C to 80°C. For lower temperatures, consult the manufacturer for appropriate grades and impact testing. ### Q: How is the surface prepared? **A**: The plate is shot blasted and primed to Sa 2.5 per ISO 8501-1. This prepares the surface for further coating or fabrication. Verify the surface treatment with the supplier. ## 6. Manufacturing Compliance --- ### 🛠️ Engineering Resource Access 🔗 **[Full Specification: High-Strength Low-Alloy Steel Plate](https://cnfx.com/industry/manufacture-tanks-reservoirs-containers-metal/product/high-strength-low-alloy-steel-plate)** ### 🌐 Knowledge Graph Topology > **Node Status**: Verified Engineering Spec > **Connectivity**: Linked to **2** standalone system nodes > **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph > **Reference ID**: HIGH_STRENGTH_LOW_ALLOY_STEEL_PLATE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 31121f80