Product Description
SS400 Mid-Thickness Steel Plates are general-purpose structural carbon steel plates widely used in construction, machinery manufacturing, shipbuilding, and industrial fabrication. Produced according to JIS G3101 standard, SS400 steel offers excellent weldability, good mechanical strength, and reliable performance for load-bearing applications.
Mid-thickness steel plates typically refer to steel sheets with thickness ranging from 6mm to 50mm, offering a balance between strength, machinability, and cost efficiency.
SS400 is a mild carbon steel grade commonly used for structural purposes where high strength is not required but good forming and welding performance are essential.
Key advantages include:
● Excellent weldability and machinability
● Stable mechanical performance
● Good ductility and formability
● Cost-effective structural steel solution
● Wide availability for industrial use
|
Material |
Specification |
||
|
SS400 |
Length (mm) |
Width (mm) |
Thickness(mm) |
|
Regular (medium plate) |
6000 - 12000 (can be customized according to customer needs) |
2000-2500 (can be customized according to customer needs) |
14-20 /25 (can be customized according to customer needs) |
|
sheet |
6000 - 12000 (can be customized according to customer needs) |
1000-1800 (can be customized according to customer needs) |
5-12 (can be customized according to customer needs) |
|
thick plate |
6000 - 12000 (can be customized according to customer needs) |
2800-5500 (can be customized according to customer needs) |
25-100 (can be customized according to customer needs) |
|
Extra thick plate |
6000 - 12000 (can be customized according to customer needs) |
2800-5500 (can be customized according to customer needs) |
100-300 (can be customized according to customer needs) |
Characteristics of SS400 medium and thick plates: Yield strength is not less than 245MPa when the thickness is less than 16mm, not less than 235MPa when the thickness is 16-40mm, not less than 215MPa when the thickness is greater than 40mm, tensile strength is between 400-510MPa, elongation is not less than 21%, good processing performance, easy to cut, drill, form, good weldability;
Application: machinery manufacturing, construction field, petrochemical equipment, boilers, pressure vessels, small and medium-sized bridge manufacturing, automobile longitudinal beam and cross beam manufacturing
Our company's advantages: direct sales price from steel mills, stable product quality, strong supply capacity, focus on external standard product materials and specifications, flexible payment methods, and professional foreign trade team.
● Reliable Structural Strength – Suitable for general load-bearing structures and fabrication projects.
● Easy to Process – Can be cut, drilled, welded, and formed using standard industrial methods.
● Cost-Effective Material – Ideal balance between performance and affordability.
● Wide Application Range – Used across construction, machinery, and shipbuilding industries.
● Stable Material Quality – Manufactured under JIS G3101 standards for consistent performance.
| Parameter | Specification |
| Material Grade | SS400 (JIS G3101) |
| Type | Mid-Thickness Carbon Steel Plate |
| Thickness Range | 6mm – 50mm |
| Width | 1000mm – 2500mm |
| Length | 2000mm – 12000mm (customizable) |
| Surface Condition | Hot rolled / pickled / oiled / black surface |
| Tensile Strength | 400–510 MPa |
| Yield Strength | ≥245 MPa |
| Elongation | ≥20% |
| Standard | JIS G3101 |
● Construction Industry – building structures, steel frameworks, bridges
● Machinery Manufacturing – machine bases, frames, structural parts
● Shipbuilding – hull structures, decks, internal supports
● Pressure Equipment – tanks, containers, support plates
● Infrastructure Projects – industrial platforms, support beams
● Thickness: 6mm – 50mm or custom cut
● Surface Treatment: black, pickled, oiled, galvanized (optional)
● Cutting Service: laser cutting / plasma cutting / CNC cutting
● Edge Processing: mill edge / slit edge / custom machining
● OEM Supply: available for bulk orders
● Factory direct steel plate supplier
● Stable bulk inventory and fast delivery
● Strict quality inspection system
● Custom cutting and fabrication support
● Competitive wholesale pricing
● Export packaging for global shipping
Q1: What is SS400 steel used for?
SS400 is widely used for structural applications such as buildings, machinery frames, and general fabrication due to its good weldability and cost efficiency.
Q2: Is SS400 suitable for welding?
Yes, SS400 has excellent weldability using standard welding methods without preheating in most cases.
Q3: Can SS400 steel be customized in size?
Yes, we provide custom cutting, thickness selection, and length adjustment based on project requirements.
● Steel plate bundled with waterproof protection
● Standard sizes: 5–10 days delivery
● Custom orders: 2–4 weeks production time
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