Extreme High Strength Steel (1100mpa)

S690QL1 steel plate is a high-strength welded structural steel that is a European standard

S690QL1 steel plate is a high-strength welded structural steel that belongs to the European standard and implements the EN10025--6 standard. The steel plate has been widely used in many industrial fields due to its excellent yield strength and tensile strength. S690QL1 steel plate plays an important role in many industrial fields with its excellent performance and high-standard production process. It is a trustworthy high-strength welded structural steel material.

Meaning of the grade

S means that the grade is in European standard.

690 means the yield strength of the steel plate is 690MPa.

Q means the delivery condition of the steel plate.

L means the impact temperature of the steel plate is -50°C1

Chemical composition

The chemical composition of S690QL1 steel plate includes a variety of elements, such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), nickel (Ni), chromium (Cr), molybdenum (Mo), copper (Cu), niobium (Nb), vanadium (V), nitrogen (N) and boron (B). The reasonable ratio of these elements gives S690QL1 steel plate excellent mechanical properties and corrosion resistance1.

Carbon (C): ≤0.20%

Silicon (Si): ≤0.80%

Nickel (Ni): ≤2.00%

Molybdenum (Mo): ≤0.70%

Manganese (Mn): ≤1.70%

Niobium (Nb): ≤0.06%

Titanium (Ti): ≤0.05%

Copper (Cu): ≤0.50%

Chromium (Cr): ≤1.50%

Boron (B): ≤0.005%

Vanadium (V): ≤0.12%3

Delivery Status

Normally, S690QL1 steel plate is delivered in a quenched and tempered state, i.e. quenched + tempered. This heat treatment state not only improves the hardness and toughness of the steel plate, but also significantly increases its load-bearing capacity3

Application fields

Due to its excellent performance, S690QL1 steel plate is widely used in many industrial fields, including but not limited to:

Coal mining machinery, engineering machinery (such as hydraulic supports, port cranes, flatbed transporters, etc.), construction, bridges, ships, vehicles, pressure vessels, electronics industry, environmental protection field

Surface quality requirements

The surface quality requirements for S690QL1 steel plates are very strict,and defects such as cracks, bubbles, scars, folds and admixtures are not allowed. If there are any of the above surface defects, they must be treated, and the treatment depth must not exceed half of the steel plate thickness tolerance to ensure the minimum thickness of the steel plate and smoothness without edges and corners.