Q355NH, SPA-H, Corten A/B, and ASTM A588 Weathering Steel Solutions for ISO Containers, Modular Buildings, and Cargo Units

Product Overview‌

Welcome to CJM, a steel solutions provider in supplying container steel plates designed for optimal performance and durability, supplying various corrosion-resistant weathering steels that meet the high structural and environmental demands of shipping containers, container houses, mobile storage units, and offshore containers.

We offer a complete range of grades such as Q355NH, SPA-H, Corten A/B, and ASTM A588, all of which feature excellent weldability, formability, and long-term corrosion resistance — essential properties for ISO container production and modular housing projects.

Learn more about our full range of weathering steel products on our dedicated category page:
👉 Weathering Steel Plate

Key Benefits of Weathering Steel for Containers

Steel containers are constantly exposed to salt-laden air, rain, and transport friction. Weathering steel (also called Corten steel) is specially developed to withstand outdoor conditions and minimize maintenance over years of service.

• High resistance to atmospheric corrosion
• Self-forming protective rust layer reduces painting needs
• Excellent weldability for fabrication
• Strong mechanical properties for stacking, lifting, and impact
• Ideal for shipping containers, modular buildings, equipment housing, and containerized offices

CJM’s weathering steel meets global standards and is exported for container manufacturing across Asia, Africa, South America, and Europe.

Common Grades for Container Steel Plates

Grade	Standard	Typical Use Case
SPA-H / SPA-C	JIS G3125	Widely used in Japanese and SEA container factories
Q355NH / Q295NH	GB/T 4171	Popular in China and Belt & Road markets
Corten A / B	ASTM A242/A606	Used in architectural container conversions
ASTM A588 Gr.A	ASTM A588	Ideal for corrosion-prone outdoor containers
S355J2W / S355JOW	EN 10025-5	Preferred in European container projects

Product Dimensions & Technical Data

Specification Item	Available Range
Thickness	1.6 – 12 mm
Width	1000 – 2200 mm
Length (cut-to-size)	2000 – 12000 mm
Coil Weight	5 – 25 tons
Delivery Condition	Hot rolled, pickled, mill finish
Surface Treatment	Oiled / Shot-blasted / Rust-proofed

Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
Q355NH	≥ 355	470–630	≥ 20
SPA-H	≥ 355	490–610	≥ 20
Corten B	≥ 345	470–630	≥ 20
A588 Gr.A	≥ 345	485–620	≥ 20

Chemical Composition

Grade	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Cr (%)	Cu (%)	Ni (%)
Q355NH	≤0.12	≤0.55	≤1.5	0.09–0.15	≤0.03	0.4–0.6	0.25–0.4	≤0.65
SPA-H	≤0.12	≤0.3	≤1.6	≤0.035	≤0.035	≥0.4	≥0.2	≤0.65
Corten A	≤0.12	0.25–0.75	≤0.6	≤0.04	≤0.05	0.4–0.65	0.25–0.55	≤0.65
A588 Gr.A	≤0.19	≤0.4	≤1.35	≤0.04	≤0.05	0.4–0.65	0.25–0.4	≤0.4

Common Use Cases

Our container-grade weathering steel is widely applied in:

• Standard ISO shipping containers (20ft, 40ft, HC)
• Container housing systems (modular homes, site offices)
• Tool/equipment containers for military, telecom, energy
• Reefer container frames
• Custom container-based cafés, studios, and workshops

Why Choose Us?

• Global Presence: We provide container steel plates to companies around the world, delivering both consistency and quality across borders.
• High-Quality Standards: We ensure our plates meet or exceed industry standards, with full certifications available on request.
• Customized Solutions: Tailored thicknesses, grades, and sizes to meet your unique needs.
• Technical Expertise: Our team offers expert consultation and support to help you choose the right steel for your container projects.
• Timely Delivery: With an established global network, we ensure fast and reliable delivery to meet your project timelines.

Factory & Equipment‌

Packaging & Logistics‌

• Standard Export Packaging‌: Waterproof paper + steel straps + wooden pallets.
• Flexible Options‌: OEM packaging or bulk shipments.
• Global Logistics‌: FOB, CIF, or door-to-door delivery with real-time tracking.

Request a Quote

Need a reliable source for container-grade weathering steel? CJM is ready to support your business with top-quality products and fast international service.

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