Premium SPA-H / SPA-C Weathering Steel Plates for Long-Lasting Durability

Introduction to SPA-H / SPA-C Weathering Steel Plates

SPA-H and SPA-C steel plates are high-performance weathering steels widely recognized for their excellent atmospheric corrosion resistance. These plates form a protective rust layer when exposed to air, significantly reducing the need for painting and maintenance, which makes them ideal for harsh outdoor environments.

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Typical Applications:

SPA-H and SPA-C plates are widely used in industries requiring high corrosion resistance and structural strength, including:

• Container manufacturing
• Bridge and infrastructure construction
• Automotive and railway vehicles
• Architectural cladding and facades
• Outdoor storage tanks and equipment

Their ability to withstand harsh weather conditions without frequent repainting reduces lifecycle costs and environmental impact.

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Specifications and Standards

Standard	Grade	Thickness (mm)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
JIS G3125	SPA-H	3-50	345	470-630	≥21
JIS G3125	SPA-C	3-50	295	470-590	≥23

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Chemical Composition (%)

Element	C	Si	Mn	P	S	Cu	Ni	Cr	Nb
SPA-H	≤0.15	0.30	1.00	≤0.030	≤0.030	0.25-0.55	0.30-0.60	0.40-0.70	≤0.10
SPA-C	≤0.20	0.30	1.00	≤0.035	≤0.035	0.15-0.40	0.10-0.30	0.30-0.60	≤0.10

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Mechanical Properties

Grade	Thickness (mm)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Impact Energy (J) at -20℃
SPA-H	≤16	≥355	490-630	≥20	≥27
SPA-H	>16	≥345	470-630	≥20	≥27
SPA-C	≤16	≥275	410-560	≥22	≥27
SPA-C	>16	≥265	390-560	≥22	≥27

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Key Features of SPA-H / SPA-C Steel Plates

• Superior resistance to atmospheric corrosion
• Excellent mechanical strength and toughness
• Reduced maintenance cost due to self-protective rust layer
• Good weldability and formability
• Available in various thicknesses and sizes to meet customer needs

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Packaging & Shipment

• Packing Type: Standard seaworthy packaging
• Delivery Time: 7–15 working days after order confirmation
• Customized Sizes: Available based on project needs
• Port: Tianjin / Qingdao / Shanghai
• MOQ: 1 tons

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Why Choose CJM Steel for Corten Products?

🏭 Direct Factory Supply with full certification
🌐 Export Experience in 40+ Countries
⚙️ Custom Processing: cutting, bending, beveling
📦 In-Stock Grades: Fast dispatch from warehouse

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Request a Quote

For more information or to request a quote for SPA-H / SPA-C Weathering Steel Plates, please contact our sales team. We are committed to providing you with premium quality steel and professional service worldwide.

📧 Email: info@cjmstainlesssteel.com
🌍 WhatsApp: +8618191906640

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment