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StE500 Structural Steel Plate

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StE500 is a low-alloy, high-strength, fine-grained structural steel (material number 1.8907) conforming to the German standard DIN 17102. Its core characteristics are high strength, good low-temperature toughness, and excellent weldability. It is widely used in steel structure engineering and construction machinery that require high load-bearing capacity but involve welding processes.

Standard :
DIN 17102
Grade :
StE500
Thickness :
0.8 - 30.0 mm
Width :
800 - 2500 mm
Length :
3000 - 12000 mm

Special thickness, width, and length can be negotiated separately.
We also provide customized processing services.If you have any questions, please contact us.

Overview

DIN 17102 StE500 is a fine-grained, high-strength structural steel with a yield strength greater than 500 MPa. It is widely used in engineering structures and construction machinery requiring high strength, good weldability, and low-temperature toughness.

Grade	StE500
Standard	DIN 17102 : Weldable Normalized Fine Grain Structural Steels
Material Number	1.8907
Classification	High-strength low-alloy structural steel
Delivery Conditions	Hot-rolled, Normalized, TMCP, Normalized + Tempered.
Surface Conditions	Generally provided as natural surface state, can be processed as required, such as sandblasting, pickling, etc.
Weldability	Excellent
Machinability	It has good cold formability and is suitable for processing such as rolling, bending, and stamping.
Quality Control	Provide Mill Test Certificate. If required, Ultrasonic testing (UT), Charpy V-notch impact test, Z-direction property test (Grades Z15/Z25/Z35) can be added.

Key Features and Advantages

1. High Strength: Compared to ordinary carbon structural steel (such as S235JR), StE500 has higher yield strength and tensile strength, allowing for greater loads in designs while achieving lightweight structures.

2. Fine-Grain Strengthening: Through grain refinement treatment with alloying elements, the steel combines high strength with good low-temperature toughness, weldability, and cold bending performance.

3. Good Weldability: This steel grade is specifically designed for welded structures, has a low carbon equivalent (CEV), low susceptibility to cold cracking, low requirements for welding preheating temperature, and is less prone to post-weld cracking.

Chemical Composition

Grade	StE500
Element	C	Si	Mn	P	S	N	Al (min)	Cr	Cu	Mo	Ni	Nb	Ti	V	Nb+Ti+V
Content (max, %)	0.21	0.10 - 0.60	1.00 - 1.70	0.035	0.030	0.20	0.20	0.30	0.20	0.10	1.00	0.05		0.22	0.22

Carbon Equivalent (CEV) : 0.38% – 0.43%.

* Calculate using the standard formula recommended by the International Institute of Welding (IIW): CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.

Mechanical Properties

Grade	Thickness (t) [mm]	Yield Strength (ReH) [min, MPa]	Tensile Strength (Rm) [MPa]	Elongation (A) [min, %]	Mandrel Diameter for Bend Test
StE500	t ≤ 16	500	610 - 780	18	Longitudinal: 3a Transverse: 4a
	16 < t ≤ 35	480	610 - 780
	35 < t ≤ 50	470	610 - 780
	50 < t ≤ 60	460	610 - 780
	50 < t ≤ 70	450	610 - 780
	70 < t ≤ 85	440	600 - 770
	85 < t ≤ 100	430	590 - 760
	100 < t ≤ 125	420	580 - 750
	125 < t ≤ 150	410	570 - 740

Requirements regarding impact energy for impact tests on ISO V-notch test pieces

Steel grades of the fiowing series	Test piece direction	Requirements regarding impact energy for impact tests on ISO V-notch test pieces
Steel grades of the fiowing series	Test piece direction	-60 ℃	-50 ℃	-40 ℃	-30 ℃	-20 ℃	-10 ℃	0 ℃	10 ℃	20 ℃
Basic series and high temperature	Longitudinal	-	-	-	-	39	43	47	51	55
Basic series and high temperature	Transverse	-	-	-	-	21	24	31	31	31
Low temperature series	Longitudinal	-	27	31	39	47	51	55	59	63
Low temperature series	Transverse	-	16	20	24	27	31	31	35	39
Special low temperature series	Longitudinal	25	30	40	50	65	80	90	95	100
Special low temperature series	Transverse	20	27	30	35	45	60	70	75	80

Applications

1. Steel Structure Building Engineering

StE500 structural steel plates are the core application area. Due to their significantly higher strength than ordinary carbon structural steel, cross-sectional dimensions and self-weight can be reduced under the same load.

High-rise buildings: Used for beams, columns, and load-bearing frames.

Large-span structures: Such as roof trusses in stadiums, exhibition centers, and airport terminals.

Industrial plants: Crane beams, roof trusses, and support systems for heavy-duty workshops.

2. Bridge Manufacturing

Highway and railway bridges: Especially plate girder bridges and box girder bridges requiring welding. Fine-grained steel has good toughness and fatigue resistance, can withstand dynamic loads, and has good weldability, facilitating on-site assembly.

3. Lifting and Transportation Machinery

Crane booms: Require high strength to reduce self-weight and sufficient lifting capacity.

Gantry cranes and bridge cranes: Main beam structures.

Conveying equipment: Supports for heavy-duty conveyor belts, etc.

4. Pressure Vessels and Storage Tanks

Low- and Medium-Pressure Vessels: Tanks used for storing gases or liquids, especially large welded oil and gas storage tanks. Fine-grained steel can reduce wall thickness while maintaining strength, thus lowering material costs and welding workload.

Boiler Components: This type of steel is commonly used for pressure-bearing components operating at normal or medium temperatures.

5. Vehicles and Construction Machinery

Commercial Vehicle Chassis: Truck beams, semi-trailer frames.

Construction Machinery Structural Components: Excavator booms and sticks, loader frames, dump truck floor plates, etc. It is wear-resistant, impact-resistant, and easy to weld and repair.

6. Offshore Structures

Offshore Platforms: Jacket frames, deck modules, etc. Fine-grained steel plates are characterized by high notch toughness at low temperatures.

Port Machinery: Quay cranes (container cranes), etc.

7. Power Transmission and Transformation Facilities

Transmission Towers: Especially high-voltage, long-span transmission towers require high-strength steel to reduce tower weight and wind resistance.

Wind Turbine Towers: The towers of wind turbines are constructed from thick rolled and welded plates, requiring high material strength and weldability.

Other Information

Equivalent material of DIN 17102 StE500

Parameter	StE500 (DIN 17102)	Q500 (GB/T 1591, Grade D typical)	S500QL (EN 10025-6, Quenched and Tempered)
Standard & Type	German former standard, fine-grained high-strength structural steel, primarily controlled-rolled/normalized	Chinese national standard low-alloy high-strength steel, Q500C/D/E, controlled-rolled/normalized; Q500E can meet low-temperature requirements	European standard quenched and tempered (Q+T) high-strength steel, 'L' indicates -40°C low-temperature impact guarantee
Delivery Condition	Hot-rolled, controlled-rolled (TMCP), normalized, normalized + tempered	Hot-rolled, controlled-rolled, normalized; thicker plates can be quenched and tempered as required	Must be quenched and tempered (Q+T)
Yield Strength Re (MPa, typical ≤50mm)	520–670 (typically ≥500, decreases with plate thickness)	≤16mm: ≥500; 16–40mm: ≥480; 40–63mm: ≥470	≤50mm: ≥500; 50–100mm: ≥480; 100–150mm: ≥440
Tensile Strength Rm (MPa)	630–780	610–770 (thin); 590–750 (thick)	590–770 (≤100mm); 540–720 (>100mm)
Elongation A (%)	≥18 (thin) ~ 20 (thick)	≥17	≥17
Impact Energy (Akv)	By agreement: -20°C ≥34J; default: room temperature	Q500D: -20°C ≥34J; Q500E: -40°C ≥34J	Mandatory: -40°C, longitudinal ≥30J, transverse ≥27J
Carbon Equivalent Ceq	Low, ≤0.42, good weldability	Low, ≤0.42, good weldability	Slightly higher, requires controlled welding procedures and low-hydrogen consumables
Typical Chemical Comp. (C max)	≤0.21%	≤0.18%	≤0.22%
Applicable Temperature Range	General conditions, -20°C requires agreement	Q500D: -20°C; Q500E: -40°C	-40°C guaranteed, suitable for cold regions / low-temperature equipment
Application Scenarios	Automotive frames, construction machinery structures, general steel structures	Industrial buildings, bridges, equipment structures, vehicles; Q500E used for wind power, low-temperature vessels	Offshore platforms, wind turbine towers, low-temperature bridges, pressure vessels, high-stress structures
Weldability	Excellent, low preheating temperature required (100–150°C for thick plates)	Excellent, standard low-hydrogen consumables, preheating for thick plates	Good, but thick plates must be preheated (120–180°C) and cooled slowly after welding to avoid cracks

FAQ

Q1:

What are the weldability characteristics of high-strength low-alloy steel plates?

High-strength low-alloy steel plates offer excellent weldability. As their carbon content is typically low (below 0.2%), they present a lower risk of cracking during welding compared to standard high-strength steel plates and generally do not require complex preheating treatments.

Q2:

Why are high-strength low-alloy steels the preferred choice in construction and automotive manufacturing?

The key advantage of high-strength low-alloy steels is weight reduction. As they offer greater strength, thinner sheets can be used to withstand the same loads, thereby reducing the overall weight of the structure; in the automotive sector, this leads to improved fuel efficiency.

Q3:

What is high-strength low-alloy steel (HSLA)?

High-strength low-alloy steel (HSLA) is a type of steel in which small amounts of alloying elements (such as niobium, vanadium, titanium or copper) are added to enhance its mechanical properties. Compared to traditional carbon steel, it offers higher yield strength and better corrosion resistance whilst maintaining good weldability and formability.