Q460 / S355J2 / A572 and Other Grades for Demanding Structural Applications

Q460 / S355J2 / A572 and Other Grades for Demanding Structural Applications

When planning large-scale construction or heavy fabrication projects, selecting the right high-strength structural steel plate is critical to ensuring safety, performance, and long-term durability. At CJM, we supply a comprehensive range of structural steel plates that combine exceptional yield strength, impact resistance, and fabrication versatility, ideal for demanding applications like bridge decks, wind towers, crane booms, and industrial frames.

As a professional exporter based in China, CJM maintains over 1 million tons of inventory and provides global buyers with fast, certified supply options.

Common Applications of High-Strength Steel Plates

1. For Mechanical Equipment & Heavy Machinery

High-strength plates like Q690 and A514 are used in cranes, excavators, and mining equipment where load-bearing performance is essential.
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2. For Wind Tower Fabrication

Grades such as S420NL and S460NL are widely used in wind turbine towers due to their excellent weldability and toughness at low temperatures.
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3. For Bridge Projects

Plates like Q460C, S355J2+N, and A709 Gr.50 are used in welded box girders, suspension bridges, and modular span sections.
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Common Steel Grades We Supply

Grade	Standard	Category	Common Uses
Q355D	GB/T 1591	Structural Steel	Construction, cranes
Q460C	GB/T 1591	High-Strength Structural	Bridges, towers, welded structures
Q690D	GB/T 16270	Ultra High Strength	Equipment booms, offshore platforms
S355J2	EN 10025-2	Fine-Grain Structural	Building frames, towers, heavy steel
S420NL	EN 10025-3	Normalized HS Steel	Wind tower, offshore, steel piles
ASTM A572 Gr.50/60	ASTM A572	HSLA Steel	Bridge & road structures in the US
ASTM A514	ASTM A514	Alloy HS Steel	Lifting equipment, armor, heavy parts

Chemical Composition

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)
Q355D	≤0.18	≤1.70	≤0.50	≤0.030	≤0.030
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	≤0.025	≤0.025
A572 Gr.50	≤0.23	≤1.35	≤0.40	≤0.040	≤0.050
A514	≤0.21	≤1.25	≤0.35	≤0.035	≤0.035

Mechanical Properties

Grade	Yield (MPa)	Tensile (MPa)	Elongation (%)
Q355D	≥355	470–630	≥21
Q460C	≥460	550–720	≥17
Q690D	≥690	770–940	≥16
S355J2	≥355	470–630	≥22
S420NL	≥420	520–680	≥19
A572 Gr.50	≥345	450–620	≥20
A514	≥690	760–895	≥18

Processing, Fabrication & Industry FAQs

• Can these plates be used for seismic design applications?
  Yes, plates like S355J2, Q460C, and S420NL are commonly used in seismic zones and comply with relevant toughness and elongation requirements.
• Are all grades available with ultrasonic testing (UT)?
  Yes, UT can be provided upon request according to EN10160 or ASTM A578, Level B/C.
• Do you offer surface treatments like primer or galvanizing prep?
  Yes. Shot blasting + shop primer is available. For galvanizing, ensure compatibility of Si content (under 0.20%).
• Is custom plate rolling possible?
  Yes. Besides stock sizes, we can roll-to-order thicknesses according to your demand.
• What welding recommendations apply for these high-strength steels?
  Use low hydrogen electrodes (e.g., E7018 or E10018) and follow controlled preheat/interpass temp as per WPS.

Available Sizes

Item	Range
Thickness	6 mm – 120 mm
Width	1500 mm – 3200 mm
Length	3000 mm – 12000 mm
Tolerance	As per EN10029 Class B or custom

About CJM

CJM is a global steel plate supplier with extensive export experience to Southeast Asia, the Middle East, Africa, Europe, and the Americas. We specialize in carbon and alloy structural steel plates, offering full processing services including cutting, drilling, welding preparation, and galvanization support.

With a full range of high-strength structural steel grades, CJM helps contractors and fabricators worldwide get high-performance steel with fast delivery and professional support.

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.

📩 Contact Us for Your High-Strength Steel Needs

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