Durable Steel Plates for Transmission Towers | Q460 / S355J2 / A572 and Other Grades for Power & Telecom Tower Projects

Product Overview‌

---

Transmission towers require structural steel plates with high mechanical strength, excellent weldability, and weather resistance. CJM supplies a comprehensive range of steel plates designed for the fabrication of overhead power transmission towers, telecom towers, and radio broadcast masts. These include carbon structural steel, high strength low alloy (HSLA) steel, and fine-grain structural steel, all suitable for outdoor tower applications.

Whether you need Q460 for power towers, S355J2 for telecom structures, or A572 Gr.50 steel for electric masts, CJM delivers professional-grade solutions tailored to international grid construction standards.

---

Structural Types & Applications

• 110kV–1000kV high-voltage transmission towers
• Telecommunication towers (self-supporting & guyed)
• Substation gantries and switchyard support arms
• Steel lattice towers for wind and weather resistance

These towers require steels that provide a balance between strength, ductility, corrosion resistance, and ease of fabrication.

---

Grades & Standards Covered

Grade	Standard	Category	Common Use
Q345B / Q345C	GB/T 1591	Low alloy steel	Light-duty transmission towers
Q420B / Q460C	GB/T 1591	High strength low alloy (HSLA)	Heavy-load high-rise towers
S355J2 / S355JR	EN 10025-2	Fine-grain structural steel	Telecom towers, bracing arms
S420NL / S460NL	EN 10025-3	Normalized fine-grain steel	Projects in cold or seismic zones
ASTM A572 Gr.50/Gr.60	ASTM A572	HSLA steel	Export towers in Americas
ASTM A36	ASTM A36	Carbon structural steel	Base plates and brackets

---

Chemical Composition

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)
Q345C	≤0.20	≤1.70	≤0.50	≤0.035	≤0.035
Q460C	≤0.20	≤1.70	≤0.50	≤0.030	≤0.030
S355J2	≤0.20	≤1.60	≤0.55	≤0.030	≤0.030
S420NL	≤0.20	≤1.60	≤0.50	≤0.030	≤0.030
A572 Gr.50	≤0.23	≤1.35	≤0.40	≤0.040	≤0.050

---

Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
Q345C	≥345	470–630	≥21
Q460C	≥460	550–720	≥16
S355J2	≥355	470–630	≥22
S420NL	≥420	520–680	≥19
A572 Gr.50	≥345	450–620	≥20

---

Welding & Processing

All tower-grade plates are weldable using low hydrogen consumables. We support:

• Pre-beveled plate supply
• CNC cutting, punching, and flattening
• Custom drilling for bolt holes

All grades are compatible with welding standards used in tower fabrication.

---

Galvanizing Compatibility

All transmission tower steel plates can be supplied in hot-dip galvanized condition, or with suitable surface preparation for galvanization. Zinc coating supports long-term corrosion resistance for outdoor installations.

---

Available Sizes

Parameter	Range
Thickness	6 mm – 50 mm
Width	1500 mm – 3200 mm
Length	3000 mm – 12000 mm
Surface	Mill, pickled, oiled, galvanized

---

Typical Buyer Concerns

Do you offer tower steel plates cut to drawing?
✅ Yes, including drilled, chamfered, and pre-weld prep edges.

Can the plates be hot-dip galvanized after processing?
✅ Yes, all grades are zinc-friendly and free from surface defects.

Do you supply for EPC projects?
✅ We serve EPC contractors, tower fabricators, and grid bidders globally.

---

Why Choose CJM?

• Global Presence: We provide container steel plates to companies around the world, delivering both consistency and quality across borders.
• Top-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.

---

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.

Get a Quotation

Need steel plates for your transmission tower project? Send us your required grades, specs, or drawings. Our engineers will support your project from inquiry to shipment.

🌐 WhatsApp: +8618191906640

📧 Email: info@cjmstainlesssteel.com

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