Carbon Steel Plate is one of the most widely used steel materials in global industrial and construction markets. Thanks to its cost-effectiveness, stable performance, and wide applicability, carbon steel plate plays a critical role in pressure vessels, structural engineering, energy equipment, and general fabrication.
As an experienced steel supplier, GNEE Steel provides high-quality carbon steel plates that meet international standards and diverse project requirements.
What Is Carbon Steel Plate?
Carbon steel plate is a type of steel plate primarily composed of iron (Fe) and carbon (C), with carbon content typically ranging from 0.05% to 1.0%. Unlike alloy steel, carbon steel contains little or no additional alloying elements.
The mechanical properties of carbon steel plates-such as strength, hardness, ductility, and weldability-are mainly determined by carbon content and heat treatment.
Types of Carbon Steel Plate (by Carbon Content)
🔹 Low Carbon Steel Plate (≤ 0.25% C)
Features
- Excellent ductility and weldability
- Easy forming and machining
- Lower strength, higher toughness
Typical Grades
- ASTM A36
- ASTM A283 Gr. C
- EN S235 / S275
- GB Q235
Applications
- Building structures
- Bridges
- General fabrication
- Storage tanks
🔹 Medium Carbon Steel Plate (0.25%–0.60% C)
Features
- Higher strength and hardness
- Moderate weldability
- Good wear resistance
Typical Grades
- ASTM A516 Gr. 60 / 70
- ASTM A572 Gr. 50
- EN C45 / P355
- GB Q345
Applications
- Pressure vessels
- Boilers
- Heavy machinery
- Oil & gas equipment
🔹 High Carbon Steel Plate (≥ 0.60% C)
Features
- Very high strength and hardness
- Lower ductility
- Poor weldability without heat treatment
Typical Grades
- ASTM AISI 1045 / 1050
- EN C60 / C70
Applications
- Wear-resistant parts
- Cutting tools
- Springs
- Industrial knives
Common Carbon Steel Plate Standards
ASTM / ASME
| Standard | Grade | Application |
|---|---|---|
| ASTM A36 | - | Structural steel |
| ASTM A516 / ASME SA516 | Gr. 60 / 65 / 70 | Pressure vessels |
| ASTM A515 | Gr. 60 / 70 | Boilers |
| ASTM A572 | Gr. 50 | High-strength structures |
| ASTM A283 | Gr. C | Low & intermediate strength |
EN Standards
| Standard | Grade | Feature |
|---|---|---|
| EN 10025 | S235 / S275 / S355 | Structural steel |
| EN 10028-2 | P265GH / P355GH | Pressure vessel steel |
GB (China)
| Grade | Equivalent |
|---|---|
| Q235 | ASTM A36 |
| Q345 | ASTM A572 Gr.50 |
| Q245R | ASTM A515 |
| Q345R | ASTM A516 Gr.70 |
Core Advantages of GNEE Steel's Carbon Steel Plates
GNEE Steel's carbon steel plates stand out in the market due to their strict quality control and customer-centric design.
The key advantages are as follows:
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1. Excellent Cost-Effectiveness
Compared with alloy steel plates, carbon steel plates have lower raw material and production costs while meeting the performance requirements of most general and structural applications. They help customers reduce project costs significantly without compromising quality.
2. Versatile Performance & Wide Adaptability
With a complete range of grades, our carbon steel plates can be tailored to different needs: low-carbon grades for easy processing, medium-carbon grades for balanced strength and toughness, and high-carbon grades for wear resistance. They adapt to various processing methods such as welding, cutting, bending, and forging.
3. Stable Quality & Reliable Certifications
We adopt advanced production processes (such as controlled rolling and cooling) and strict quality management systems. Each batch of plates comes with a complete Material Test Certificate (MTC), and we have passed ISO 9001, CCS, ABS, DNV, and other international certifications. Customers can use them with confidence.
4. Complete Specifications & Customizable Services
Our carbon steel plates cover a wide range of specifications: thickness from 2mm to 200mm, width from 1220mm to 4200mm, and length customizable up to 18000mm. We also provide value-added services such as surface pickling, shot blasting, cutting, and drilling to meet customers' personalized needs.
Typical Applications of Carbon Steel Plates
Thanks to their versatility and cost-effectiveness, GNEE Steel's carbon steel plates are widely used in almost all industries.
The main application scenarios are as follows:
1. Construction & Infrastructure
Used in building frames, beams, columns, floors, and roof structures; bridge decks, supports, and piers; highway guardrails, culverts, and tunnel linings. Low-carbon steel plates such as Q235B and A36 are the preferred choices for these projects due to their excellent weldability and structural stability.
2. Machinery Manufacturing
Applied to the manufacturing of machine tool beds, brackets, gears, shafts, and connecting rods. Medium-carbon steel plates such as 45# and 1045 are widely used in mechanical parts due to their balanced strength and toughness; high-carbon steel plates are used in tool manufacturing such as dies and blades.
3. Shipbuilding & Marine Engineering
Used in hull structures (hull plates, bulkheads), decks, and superstructures. Shipbuilding-specific carbon steel plates (such as grade A/B/D/E) have excellent low-temperature impact toughness and corrosion resistance, adapting to the harsh marine environment.
4. Energy & Petrochemical Industry
Boiler and pressure vessel carbon steel plates (such as Q245R, SA516Gr.70) are used in boiler shells, heat exchangers, oil storage tanks, and gas pipelines. They can withstand high temperatures, high pressures, and medium corrosion.
5. Automotive & Transportation
Used in automotive chassis frames, body structures, and trailer floors; railway carriages, ship containers, and truck beds. Low-carbon steel plates are favored for their formability and cost-effectiveness, helping to reduce the weight of vehicles while ensuring safety.
6. Other Industries
In the agricultural machinery industry, used for tractor frames and harvester components; in the home appliance industry, used for washing machine inner tubs and refrigerator shells; in the hardware industry, used for fasteners and tools.
GNEE Steel Carbon Steel Plate Supply Capability
GNEE Steel supplies carbon steel plates with:
Thickness: 6–200 mm
Width: up to 4,000 mm
Delivery condition: AR / Normalized (N) / Stress Relieved (SR)
Standards: ASTM, ASME, EN, GB
Inspection: EN 10204 3.1 / 3.2
Applications: pressure vessels, heat exchangers, reactors, tanks, and towers
If you want to learn more about GNEE's products, you can send an email to alloy@gneesteelgroup.com. We are more than happy to assist you.
FAQ
Q1: Is carbon steel plate suitable for pressure vessels?
Yes. Grades such as ASTM A516 Gr.70 and ASME SA516 are widely used for pressure vessels and boilers.
Q2: What is the difference between carbon steel plate and alloy steel plate?
Carbon steel mainly relies on carbon for strength, while alloy steel contains additional alloying elements for enhanced performance at high temperatures or pressures.
Q3: Can carbon steel plate be welded?
Yes. Low and medium carbon steel plates have good weldability. Preheating may be required for higher carbon grades.
Q4: What standards does GNEE Steel follow?
GNEE Steel supplies carbon steel plates according to ASTM, ASME, EN, and GB standards, with full inspection certificates.
Q5: Does GNEE Steel support customized sizes?
Yes. Customized thickness, width, length, and inspection requirements are available upon request.
