SS400 Carbon Steel Plate is defined by the Japanese Industrial Standard (JIS G3101). The designation "SS" stands for "Steel Structure," and "400" indicates a minimum tensile strength of 400 MPa. As one of the most widely used mild steel grades globally, SS400 offers an optimal balance of strength, ductility, weldability, and cost-effectiveness. It is primarily supplied in hot-rolled condition and serves as a foundational material for construction, machinery manufacturing, shipbuilding, and industrial infrastructure
Chemical Composition
Equivalent to China's Q235B and ASTM A36 standards
SS400 is a low-carbon steel with strict limits on impurities to ensure good weldability and toughness.
Carbon (C): ≤ 0.30% (for thickness ≤ 40mm)
Manganese (Mn): Typically 0.50–0.80%
Phosphorus (P): ≤ 0.050%
Sulfur (S): ≤ 0.050%
Silicon (Si): Not strictly specified but generally low to maintain ductility.
Mechanical Properties
The mechanical properties of SS400 Carbon Steel Plate vary slightly based on plate thickness:
Tensile Strength: 400 – 510 MPa
Yield Strength:
≥ 245 MPa (Thickness ≤ 16 mm)
≥ 235 MPa (16 mm < Thickness ≤ 40 mm)
≥ 215 MPa (10 mm < Thickness ≤ 100 mm)
Elongation: Minimum 21–26% (depending on thickness and test direction), indicating good formability
Dimensions & Tolerances
Thickness: Commonly 1 mm – 100 mm
Width: 600 mm – 4,000 mm (Standard widths: 1,000 mm, 1,219 mm, 1,250 mm, 1,500 mm, 1,800 mm, 2,000 mm, 2,500 mm)
Length: 2,000 mm – 12,000 mm (Customizable; standard sizes include 2,438 mm, 3,000 mm, 6,000 mm)
Tolerance: ±1% to ±3% depending on precision requirements and international standards (ASTM/GB/JIS).
Advantages of sS400 carbon steel plate
Cost-Effectiveness: As a standard carbon steel, SS400 is more affordable than alloy steels or stainless steel, making it ideal for large-scale projects.
Excellent Weldability: Low carbon content minimizes the risk of cracking during welding, reducing production time and costs.
High Formability: Good ductility allows for complex bending and shaping without fracture.
Global Availability: Compliant with multiple international standards (JIS G3101, ASTM A36 equivalent, GB Q235B equivalent), ensuring easy sourcing and global project compatibility.
Reliable Strength: Provides sufficient tensile and yield strength for most structural and mechanical applications.
Quality Assurance & Certifications
To ensure reliability and safety, SS400 Carbon Steel Plates are typically supplied with:
Mill Test Certificate (MTC): Detailed chemical composition and mechanical property reports.
Third-Party Inspection: SGS, BV, or CE certification available upon request.
Standard Compliance: Meets JIS G3101, ASTM A36/A36M, GB/T 700, DIN EN 10025, and BS standards.
Contact
Kevin
Tianjin shenzhoutong steel pipe co.,ltd
kevin@tjshenzhoutong.com
Mob/whatsapp/wechat +86 15267768016
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