What is the mechanical properties of s960ql ?
S960QL is an ultra-high-strength structural steel (EN 10025-6) known for its high yield strength of 960 MPa minimum, excellent toughness, and good weldability, making it ideal for heavy-duty, load-bearing structures like cranes and machinery, achieved through quenching and tempering (Q) with low-temperature notch toughness (L) testing. Key properties include tensile strength of 980-1150 MPa and good elongation (around 12% for thinner sections), allowing for lighter, more efficient designs in demanding applications.
The alloyed special steel S960QL is a quenched and tempered weldable fine grained steel with a minimum yield strength of 960 N/mm². Application: welded steel constructions of various types, e.g. bridges and load-carrying constructions as well as transport vehicles, lifting and earthmoving machines Hot forming property: allowed only for stress relieve annealing temperature (max. 580°C) Suitability for welding: Steel is weldable according to the common welding methods (EURONORM-INFORMATION No. 2 has to be considered) Surface treatment: hot dip coating suitability is arrangeable on order (suitability classes see DIN EN 10025-6)
S960QL is a European standard (EN 10025-6) designation for a very high-strength structural steel with a minimum yield strength of 960 MPa, known for excellent strength, toughness, weldability, and bendability, making it ideal for demanding load-bearing structures in cranes, heavy machinery, and infrastructure where weight reduction is crucial, processed through quenching and tempering (the 'QL' part) for superior mechanical properties.
Key Characteristics
S: Denotes structural steel.
960: Indicates a minimum yield strength of 960 N/mm² (or MPa).
Q: Means it's produced by quenching and tempering.
L: Specifies impact energy toughness at low temperatures (e.g., -40°C).
Properties & Advantages
High Strength-to-Weight Ratio: Allows for lighter structures without compromising strength.
Excellent Toughness: Good resistance to fracture, even at low temperatures.
Superior Weldability: Can be welded using conventional methods (like MAG) with good HAZ (Heat Affected Zone) strength.
Good Formability: Offers predictable bending and forming with standard equipment.
Common Applications
Cranes and Lifting Equipment
Heavy Machinery & Earthmoving Equipment
Bridges and Structural Components
Offshore & Wind Energy Components
What is the hardness of S960QL?
The hardness of S960QL steel is typically around 414 HBW (Brinell Hardness), though it's a high-strength structural steel defined by its yield strength of at least 960 MPa (depending on thickness) and delivered in a quenched and tempered (Q&T) condition, making it strong but requiring careful welding due to cold cracking risks.
What temperature is S960QL?
S960QL is a high-strength structural steel known for excellent performance at low temperatures, specifically tested for minimum impact energy at -40°C (-40°F), but it also handles moderate to high temperatures, with research studying its properties up to 900°C or more for applications like heavy machinery, though it's processed with high heat (e.g., 1350°C for austenitizing) and quenched for strength. Its "QL" designation confirms it's quenched and tempered for low-temperature toughness.
What is S960QL material?
S960QL is a very high-strength structural steel conforming to the European standard EN 10025-6, known for its minimum yield strength of 960 MPa, excellent toughness, and superior abrasion resistance, achieved through a quenching and tempering (Q&T) process, making it ideal for heavy-duty applications like mobile cranes, mining equipment, and heavy transport where weight savings and high load capacity are crucial.
EN S960QL steel equivalent grades:
| EU | Germany | France |
| EN | DIN,WNr | AFNOR |
| S960QL | TStE960V | E960T |
| S960T |
Chemical composition % of steel S960QL (1.8933): EN 10025-6-2004
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Cu | Zr | B | CEV |
| max 0.2 | max 0.8 | max 1.7 | max 2 | max 0.02 | max 0.01 | max 1.5 | max 0.7 | max 0.12 | max 0.015 | max 0.06 | max 0.05 | max 0.5 | max 0.15 | max 0.005 | max 0.82 |
Mechanical Properties of S960QL
| Designation | Mechanical Properties (ambient temperature) | |||||||
|---|---|---|---|---|---|---|---|---|
| Steel Name | Steel Number | Min. Yield Strength ReH MPa | Tensile Strength Rm MPa | Min. & elongation after fracture | ||||
| Nominal thickness (mm) | Nominal thickness (mm) | |||||||
| >3 <50 | >50 <100 | >100 <150 | >3 <50 | >50 <100 | >100 <150 | |||
| S960QL | 1.8933 | 960 | -- | -- | 980/1150 | -- | -- | 10 |
S960QL Steel Plate V Notch Impact Testing
|
Grade |
Sample Orientation |
@ 0°C |
@-20°C |
@-40°C |
@-60°C |
|
S960QL |
Longitudinal |
50 J |
40 J |
30 J |
–– |
|
Traverse |
35 J |
30 J |
27 J |
–– |
1What is S960QL material?
S960QL is a very high-strength structural steel conforming to the European standard EN 10025-6, known for its minimum yield strength of 960 MPa, excellent toughness, and superior abrasion resistance, achieved through a quenching and tempering (Q&T) process, making it ideal for heavy-duty applications like mobile cranes, mining equipment, and heavy transport where weight savings and high load capacity are crucial. The "S" denotes structural steel, "960" its minimum yield strength in MPa, "Q" signifies quenching, and "L" indicates specified impact energy at low temperatures (e.g., -40°C).
2What is the P number of S960QL?
The P-number for S960QL steel isn't a simple single digit like P1 or P2; instead, S960QL (a high-strength, quenched & tempered steel) typically falls into P-Group 1 (P1) in ASME Section IX for welding, as it's a low-alloy steel with limited alloying elements, though its high strength and specific composition often require referencing its EN designation (1.8933) and manufacturer data for precise welding procedures, generally grouping it with other low-alloy steels for basic classification.
3What is S960QL standard?
The S960QL standard refers to a European high-strength structural steel (EN 10025-6) known for its exceptional minimum yield strength of 960 MPa (megapascals), achieved through quenching and tempering (the 'Q' and 'L' denote quenching/tempering and low-temperature impact toughness, respectively). This steel allows for significant weight reduction in heavy-duty applications like construction machinery, cranes, and mining equipment, offering superior load-bearing capacity, excellent toughness, good weldability, and resistance to abrasion, making it ideal for safety-critical, high-stress structures.
4How heavy is S960QL?
S960QL is a high-strength structural steel, so its "weight" depends on its dimensions (thickness, width, length), but its density is around 7.84 g/cm³ (490 lbs/ft³), meaning a 1-inch thick plate weighs approximately 40.8 lbs per square foot (658 kg/m²), with specific weights varying by thickness and product form (plate, tube).
5Is S960QL carbon steel?
Yes, S960QL is a type of high-strength low-alloy (HSLA) carbon steel, specifically a quenched and tempered (Q+T) structural steel known for its exceptional yield strength (960 MPa), making it suitable for heavy-duty engineering applications like cranes, bridges, and mining equipment, balancing high strength with good toughness and weldability.
6What precautions should be taken when welding S960QL?
When welding S960QL high-strength steel, precautions focus on preventing hydrogen cracking and maintaining toughness, requiring thorough cleaning, using low-hydrogen consumables, strict heat input control (low interpass temps < 250°C), preheating (if needed), and slow, controlled cooling post-weld, alongside standard welding safety (PPE, ventilation) for hazardous fumes from primers or coatings.
7What is S960QL equivalent to?
S960QL is a European standard (EN 10025-6) very high strength structural steel, equivalent to German TStE960V, French E960T/S960T, and sometimes linked to ASTM standards like Q345 (though Q345 is lower strength) or A514, with its strength coming from quenching and tempering, offering excellent weldability and toughness for heavy-duty applications like cranes and mining equipment.
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