---
type: "product_component"
title: "Hot-Rolled Carbon Steel Plate"
industry: "Manufacture of Tanks, Reservoirs and Containers of Metal"
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  index_version: "2026.Q1-Universal"
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  primary_spec:
    status: "config-dependent"
    typical_range: "Yield strength: 250-355 MPa at 20°C, operating temperature: -40°C to 400°C, thickness tolerance: ±0.5-1.5 mm depending on plate thickness (3-200 mm)"
    unit: "mm"
  secondary_spec:
    status: "config-dependent"
    typical_range: "Yield strength: 250-355 MPa at 20°C, operating temperature: -40°C to 400°C, thickness tolerance: ±0.5-1.5 mm depending on plate thickness (3-200 mm)"
    unit: "MPa"
engineering_limits:
  max_safe_operating_point:
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    unit: "MPa"
    consequence: "Microvoid coalescence at pearlite-ferrite interfaces under triaxial stress exceeding 0.577σ_y (Tresca criterion), hydrogen-induced cracking at >5 ppm diffusible hydrogen content, lamellar tearing at through-thickness strain >0.8%"
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  - node_1:
      trigger: "Sulfide stress corrosion cracking from H2S exposure >50 ppm in wet service"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Post-weld heat treatment at 620-650°C for 1 hour per 25 mm thickness, hardness control to ≤22 HRC via microalloying with 0.02-0.05% Nb"
  - node_2:
      trigger: "Lamellar tearing from through-thickness Z-direction strain >0.8% during fabrication"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Specify Z35 quality steel with through-thickness reduction area >35%, ultrasonic testing at 5 MHz frequency with 3 mm sensitivity"
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url: "https://cnfx.com/llms/industry/manufacture-tanks-reservoirs-containers-metal/product/hot-rolled-carbon-steel-plate.md"
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version: "3.3.5-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Hot-Rolled Carbon Steel Plate

## 1. Technical Definition
Semi-finished steel plate for fabricating metal tanks and pressure vessels.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Yield strength: 250-355 MPa at 20°C, operating temperature: -40°C to 400°C, thickness tolerance: ±0.5-1.5 mm depending on plate thickness (3-200 mm)**. Failure boundary: **Fracture occurs at ultimate tensile strength: 410-510 MPa, brittle-ductile transition temperature: -20°C, creep rupture threshold: 450°C at 100 MPa stress**, Mechanism: **Microvoid coalescence at pearlite-ferrite interfaces under triaxial stress exceeding 0.577σ_y (Tresca criterion), hydrogen-induced cracking at &gt;5 ppm diffusible hydrogen content, lamellar tearing at through-thickness strain &gt;0.8%**.

### 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 |
| :--- | :--- | :--- | :--- |
| Sulfide stress corrosion cracking from H2S exposure &gt;50 ppm in wet service | 8 | Intergranular fracture propagation at hardness &gt;22 HRC regions | Post-weld heat treatment at 620-650°C for 1 hour per 25 mm thickness, hardness control to ≤22 HRC via microalloying with 0.02-0.05% Nb |
| Lamellar tearing from through-thickness Z-direction strain &gt;0.8% during fabrication | 8 | Decohesion at MnS inclusion-matrix interfaces parallel to rolling plane | Specify Z35 quality steel with through-thickness reduction area &gt;35%, ultrasonic testing at 5 MHz frequency with 3 mm sensitivity |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | mm | Verified |
| secondary_spec | Config-dependent | MPa | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Plate Rolling Machine**, **Welding Equipment**, **CNC Plasma Cutting Machine**  
**Downstream Applications**: Storage Tanks, Pressure Vessels, Chemical Containers  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the typical applications for hot-rolled carbon steel plates in tank manufacturing?
**A**: Hot-rolled carbon steel plates are primarily used for fabricating industrial storage tanks, pressure vessels, reservoirs, and containment systems due to their excellent strength, weldability, and durability under pressure.

### Q: How does carbon content affect the performance of steel plates for pressure vessels?
**A**: Carbon content directly influences hardness and tensile strength. Higher carbon percentages increase strength but may reduce weldability, so specific grades are selected based on pressure requirements and fabrication methods.

### Q: What surface preparation is needed for hot-rolled steel plates before tank fabrication?
**A**: Surface scale from the hot-rolling process must be removed through descaling methods like shot blasting or pickling to ensure proper weld quality, coating adhesion, and corrosion resistance in finished tanks.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Hot-Rolled Carbon Steel Plate](https://cnfx.com/industry/manufacture-tanks-reservoirs-containers-metal/product/hot-rolled-carbon-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**: HOT_ROLLED_CARBON_STEEL_PLATE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: cf042698