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ASTM Structural Steel Plate

ASTM A36 carbon steel structural plate for construction and infrastructure

Precision CNC flame cutting production of ASTM A572 Grade 50 steel plates

Planchas de acero estructural ASTM A36 A572 para fabricación de maquinaria

Plate Type: ASTM Structural Steel Plates,Carbon Steel Plate

Steel Grade: A36,Grade 50 / 60 / 65 etc

Width: 1220mm 1250mm 1500mm Or As Customer Required

Thickness: 2.0mm-200mm

Length: 2440mm 2500mm 3000mm Or As Required

Standard: ASTM A36,ASTM A572,ASTM A588 Weathering Steel,ASTM A709,ASTM A514,ASTM A283 Grade C

Surface: Mild Steel Plain Finish, Hot-Dip Galvanized, Color Coated, Etc.

Processing Service: Bending, Welding, Decoiling, Cutting, Punching

Application: Skyscraper & High-Rise Building Steel,Bridge Construction Plates,Heavy Machinery & Earthmoving Equipment Steel,Transmission Tower Structural Steel,Industrial Warehouse Framing,Offshore Structural Components

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Overview
Specification
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Process
FAQ

ASTM Structural Steel Plate – High-Strength Solutions for Global Infrastructure

Our ASTM Structural Steel Plates are engineered to provide the essential load-bearing strength, weldability, and durability required for modern engineering projects. From skyscrapers and bridges to heavy industrial equipment, we supply premium hot-rolled plates that meet the world’s most demanding structural codes. Our plates undergo rigorous quality control to ensure uniform thickness and superior surface quality, facilitating efficient fabrication and long-term safety.

Common Standards and Steel Grades

We provide a comprehensive inventory of carbon and low-alloy structural steels tailored to specific environmental and mechanical needs:

ASTM A36:The most widely used carbon structural steel. Excellent weldability and machinability for general construction.

ASTM A572:High-strength low-alloy (HSLA) columbium-vanadium steel.

Common Grades:Grade 42, Grade 50, Grade 60, Grade 65.

ASTM A588 (Corten Steel):High-strength low-alloy steel with enhanced atmospheric corrosion resistance (weathering steel). Perfect for bridges and outdoor structures.

ASTM A514:High-yield-strength, quenched and tempered alloy steel plate. Used in heavy-duty machinery and crane booms (GradesA, B, E, F, H, P, Q).

ASTM A283:Low and intermediate tensile strength carbon steel plates for general structural purposes.

Dimensions and Technical Specifications

We offer a vast range of sizes, from thin structural sheets to heavy-duty thick plates, with precision cutting services available:

Feature	Specification Range
Thickness (WT)	3mm to 300mm (0.118” to 11.8”)
Width	1500mm, 1800mm, 2000mm, 2200mm, 2500mm, 3000mm
Length	6000mm, 9000mm, 12000mm (Up to 18000mm for special projects)
Surface Finish	Black (Hot Rolled), Shot Blasted, Primed, or Galvanized
Processing	CNC Plasma Cutting, Laser Cutting, Bending, and Drilling

Core Application Fields

Structural steel plates are the backbone of diverse industrial and civil engineering sectors:

Civil Construction:High-rise building frames, stadium roofs, and warehouse structures.

Bridge Engineering:Plate girders, trusses, and suspension bridge components using A588 weathering steel.

Shipbuilding & Marine:Offshore platforms, deck plating, and hull structures.

Heavy Machinery:Excavator buckets, crane arms, mining equipment, and agricultural machinery.

Energy & Storage:Base plates for wind towers, storage tank floors, and transmission tower components.

Chemical Composition Comparison Table

Standard	Steel Grade	C (max)	Si (max)	Mn (max)	P (max)	S (max)	N (max)	Cu (max)	CEV (max)
Part 2	S235JR	0.17	-	1.4	0.035	0.035	0.012	0.55	0.35
(Non-alloy)	S235J0	0.17	-	1.4	0.03	0.03	0.012	0.55	0.35
	S235J2	0.17	-	1.4	0.025	0.025	-	0.55	0.35
	S275JR	0.21	-	1.5	0.035	0.035	0.012	0.55	0.4
	S275J0	0.18	-	1.5	0.03	0.03	0.012	0.55	0.4
	S275J2	0.18	-	1.5	0.025	0.025	-	0.55	0.4
	S355JR	0.24	0.55	1.6	0.035	0.035	0.012	0.55	0.45
	S355J0	0.2	0.55	1.6	0.03	0.03	0.012	0.55	0.45
	S355J2	0.2	0.55	1.6	0.025	0.025	-	0.55	0.45
	S355K2	0.2	0.55	1.6	0.025	0.025	-	0.55	0.45
Part 3/4	S420N/ML	0.2	0.5	1.7	0.025	0.02	0.015	0.35	0.48
(Fine grain)	S460N/ML	0.2	0.6	1.7	0.025	0.02	0.025	0.4	0.53

Steel Grade Comparison Properties and Composition

Standard	Steel Grade	Thickness (mm)	Yield ReH (min MPa)	Tensile Rm (MPa)	Elongation A (min %)	Impact Test (Temp/Value)
EN 10025-2	S235JR	≤1 16<t≤40	235 225	360 – 510	26	20°C / 27J
	S275JR	≤1 16<t≤40	275 265	410 – 560	23	20°C / 27J
	S355J2	≤1 16<t≤40 40<t≤63	355 345 335	470 – 630	22	-20°C / 27J
ASTM A516	Grade 60	≤200	220	415 – 550	21	Per Order (e.g., -46°C)
	Grade 65	≤200	240	450 – 585	19	Per Order
	Grade 70	≤200	260	485 – 620	17	Per Order
EN 10225	S355G10+M	≤1 16<t≤40	355 345	470 – 630	22	-40°C / 50J (L)
	S420G2+M	≤1 16<t≤40	420 400	500 – 660	19	-40°C / 50J (L)
	S460G2+M	≤1 16<t≤40	460 440	530 – 710	17	-40°C / 50J (L)
API 5L	Grade B	All	245 – 450	≥415	Formula	PSL2: 0°C / 27J
	X52Q	All	360 – 530	460 – 760	Formula	PSL2: 0°C / 27J
	X65Q	All	450 – 600	535 – 760	Formula	PSL2: 0°C / 27J
	X70Q	All	485 – 635	570 – 760	Formula	PSL2: 0°C / 27J

Carbon Steel Plate Production Process

Frequently Asked Questions

1. When do buyers usually choose ASTM structural plate over other plate families?

They usually choose it when the project is clearly structural and wants a familiar approval path for fabrication and construction. The decision is often about code fit and fabrication comfort more than about raw strength alone. Typical long-tail contexts include ASTM A36 structural steel plate, ASTM A572 Grade 50 plate for bridge fabrication, and carbon steel plate for building structures.

2. Why can structural plate prices differ more than buyers expect?

Price often changes with delivery condition, cutting, testing, documentation, and whether the plate is being supplied for direct fabrication or for a more controlled project environment. Buyers often notice that the 'same grade' comparison is not enough. That is often visible when buyers compare ASTM A36 steel plate with ASTM A572 Grade 50 plate for fabrication shops and steel structure projects.

3. What is the most useful customer question when not sure whether structural plate is the right family?

A very useful question is whether the plate will go into a building or bridge fabrication route, or whether it actually belongs to a pressure, marine, or pipeline specification. That keeps the order in the right product family. This question comes up in bridge fabrication, building construction, heavy steel frames, and equipment bases.

4. What do buyers most often overlook with structural plate orders?

They often overlook processing and approval details such as cutting, UT, impact testing, or whether the fabricator needs a tighter document package. Those items often matter more than first-time buyers think. Those issues matter most in structural steel plate orders for fabrication where cutting, UT, and document level affect approval and job cost.

Chemical Composition Comparison Table

Standard	Steel Grade	C (max)	Si (max)	Mn (max)	P (max)	S (max)	N (max)	Cu (max)	CEV (max)
Part 2	S235JR	0.17	-	1.4	0.035	0.035	0.012	0.55	0.35
(Non-alloy)	S235J0	0.17	-	1.4	0.03	0.03	0.012	0.55	0.35
	S235J2	0.17	-	1.4	0.025	0.025	-	0.55	0.35
	S275JR	0.21	-	1.5	0.035	0.035	0.012	0.55	0.4
	S275J0	0.18	-	1.5	0.03	0.03	0.012	0.55	0.4
	S275J2	0.18	-	1.5	0.025	0.025	-	0.55	0.4
	S355JR	0.24	0.55	1.6	0.035	0.035	0.012	0.55	0.45
	S355J0	0.2	0.55	1.6	0.03	0.03	0.012	0.55	0.45
	S355J2	0.2	0.55	1.6	0.025	0.025	-	0.55	0.45
	S355K2	0.2	0.55	1.6	0.025	0.025	-	0.55	0.45
Part 3/4	S420N/ML	0.2	0.5	1.7	0.025	0.02	0.015	0.35	0.48
(Fine grain)	S460N/ML	0.2	0.6	1.7	0.025	0.02	0.025	0.4	0.53

Steel Grade Comparison Properties and Composition

Standard	Steel Grade	Thickness (mm)	Yield ReH (min MPa)	Tensile Rm (MPa)	Elongation A (min %)	Impact Test (Temp/Value)
EN 10025-2	S235JR	≤1 16<t≤40	235 225	360 – 510	26	20°C / 27J
	S275JR	≤1 16<t≤40	275 265	410 – 560	23	20°C / 27J
	S355J2	≤1 16<t≤40 40<t≤63	355 345 335	470 – 630	22	-20°C / 27J
ASTM A516	Grade 60	≤200	220	415 – 550	21	Per Order (e.g., -46°C)
	Grade 65	≤200	240	450 – 585	19	Per Order
	Grade 70	≤200	260	485 – 620	17	Per Order
EN 10225	S355G10+M	≤1 16<t≤40	355 345	470 – 630	22	-40°C / 50J (L)
	S420G2+M	≤1 16<t≤40	420 400	500 – 660	19	-40°C / 50J (L)
	S460G2+M	≤1 16<t≤40	460 440	530 – 710	17	-40°C / 50J (L)
API 5L	Grade B	All	245 – 450	≥415	Formula	PSL2: 0°C / 27J
	X52Q	All	360 – 530	460 – 760	Formula	PSL2: 0°C / 27J
	X65Q	All	450 – 600	535 – 760	Formula	PSL2: 0°C / 27J
	X70Q	All	485 – 635	570 – 760	Formula	PSL2: 0°C / 27J

Carbon Steel Plate Production Process

Frequently Asked Questions

1. When do buyers usually choose ASTM structural plate over other plate families?

2. Why can structural plate prices differ more than buyers expect?

3. What is the most useful customer question when not sure whether structural plate is the right family?

4. What do buyers most often overlook with structural plate orders?

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Tags : structural steel plate , ASTM A36 plate , ASTM A572 Gr , 50 , carbon steel plate , placas de acero estructural , planchas de acero , mild steel plate

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