What are common testing requirements for S690QL1?

Common testing requirements for S690QL1, a high-strength structural steel, focus on its key properties: minimum 690 MPa yield strength, 770-940 MPa tensile strength, and crucial -60°C impact toughness (QL1 designation), verified through tensile tests and longitudinal Charpy-V notch impact tests on heat-treated plates, ensuring performance in demanding, cold environments, with testing typically per EN 10025-6 standard.

S690QL1,

Despite its immense strength, S690QL1 is specifically designed for excellent weldability and cold-forming capabilities. Its chemical composition is carefully balanced to maintain a low Carbon Equivalent Value (CEV), which reduces the risk of hydrogen-induced cracking during the welding process. This allows for high-integrity joints in complex fabricated structures like crane booms and bridge sections. Additionally, the material's fine-grained structure provides consistent performance during cutting and machining, ensuring that the high-strength properties are maintained throughout the entire manufacturing lifecycle of the component.

Key Characteristics:

High Strength: Minimum yield strength of 690 MPa (megapascals).

Low-Temperature Toughness: Tested for impact energy at -60°C, preventing brittle fracture.

Heat Treatment: Quenched and Tempered (Q&T) for enhanced mechanical properties.

Weldability: Good, due to low sulfur and phosphorus content, suitable for complex fabrication.

High Strength-to-Weight Ratio: Allows for thinner sections, reducing material use and improving efficiency.

Common Applications:

Engineering Machinery: Excavators, loaders, dozers, cranes, hydraulic supports.

Construction: Bridges, high-rise buildings, heavy structures.

Transportation: Chassis and dumper bodies for heavy road vehicles, railway components.

Mining: Machinery structures, haul trucks.

EN10025-6 S690QL1, 1.8988, DIN EStE690V High Yield Strength Structural Steel Plate

Production & Delivery:

Standard: EN 10025-6.

Delivery Condition: Quenched and tempered

What is S690QL1 equivalent to?

S690QL1 (EN 10025-6) is a high-strength, quenched, and tempered structural steel with a minimum yield strength of 690 MPa, and its common equivalents include ASTM A514, ASTM A709 Grade 100, ASTM A710, German EStE690V (DIN/WNr 1.8988), French E690T, and Swedish SS 2625 (Weldox 700), though exact interchangeability requires engineering confirmation due to specific code requirements.

What are the typical application fields of S690QL1?

S690QL1, a high-yield strength, quenched, and tempered steel, is used in heavy-duty, high-stress applications where weight saving and durability are crucial, such as cranes (booms, jibs), heavy construction equipment (excavators, bulldozers), bridges, offshore structures, mining machinery, truck chassis, and pressure vessels, benefiting from its high strength-to-weight ratio, excellent toughness at low temperatures (down to -60°C), and good weldability for lighter, stronger designs.

What is the difference between S690QL1 and S690QL?

The main difference between S690QL and S690QL1 is their specified minimum impact toughness at lower temperatures: S690QL is tested at -40°C, while S690QL1 is tested at a more extreme -60°C, making S690QL1 superior for applications in exceptionally cold environments requiring higher impact energy absorption. Both are high-strength, quenched, and tempered (Q&T) structural steels with a minimum yield strength of 690 MPa, excellent weldability, and toughness, but the "L1" designation signifies enhanced low-temperature performance.

S690QL1Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	N	B	Cr
S690 QL1	0.20	0.80	1.70	0.020-0.025	0.010-0.015	0.015	0.005	1.50
	Cu	Mo	Nb	Ni	Ti	V	Zr
	0.50	0.70	0.06	2.0	0.05	0.12	0.15

Grade	S690QL1Mechanical Property
Grade	Thickness	Yield	Tensile	Elongation
S690 QL1	mm	Min Mpa	Mpa	Min %
	3	890	940-1100	11
	50	830	880-1100	11
	100	800	820-1000	11

Equivalent steel grade of S690QL1
Europe	Germany	France	Sweden
	EStE 690 V	-	-

S690QL1 Steel Plate Notch Impact Energy

Steel Grade	Position of Samples	0°C	- 20°C	- 40°C	- 60°C
S690QL1/MAXIL® 690 QL1	LongitudinalTransverse	60 J40 J	50 J35 J	40 J30 J	30 J27 J

1 What is the hardness of S690QL1 steel?

S690QL1 steel, a high-strength quenched and tempered structural steel, doesn't have a single mandatory hardness value specified in the standard, but its hardness typically falls in the range of 235-295 BHN (Brinell Hardness Number), though it can be harder depending on processing, with the focus being on its high yield strength (≥690 MPa) and excellent toughness, making it suitable for heavy-duty, lightweight structures.

2 What is the difference between S690QL1 and Weldox 700 ?

The price for S690QL1 steel plate varies significantly by supplier, volume, and thickness, generally ranging from US$400 to over $1200 per metric ton (FOB), with some Indian suppliers quoting around ₹165 per kilogram (USD ~$2/kg), though actual costs depend heavily on specific dimensions, certifications, and current market conditions,

3 What temperature is S690QL1 steel?

S690QL1 steel is designed for low-temperature service, specifically meeting impact toughness requirements at -60°C (-76°F), making it excellent for cold environments, with typical operating temperatures ranging from roughly -60°C up to 350°C, though its properties (like yield strength) decrease at higher temperatures, and it requires preheating for welding and quenching/tempering after hot forming.

4 What is S690QL1 material specification?

S690QL1 is a high-yield, fine-grained structural steel (EN 10025-6 standard) known for its high strength (minimum yield strength of 690 MPa) and excellent toughness at low temperatures, specifically tested at -60°C. Produced by quenching and tempering (Q+T), this weldable steel is used in heavy machinery, construction, and pressure vessels where high strength-to-weight ratios are crucial, with its 'L1' designation indicating superior low-temperature impact performance compared to S690QL.