What is the difference between Q690D and S690QL1?

Q690D is a Chinese national standard steel, while S690QL1 is a European standard steel, with the main difference being their equivalent standards and impact testing temperatures. Both are high-strength, quenched and tempered structural steels with a nominal yield strength of 690 MPa, but S690QL1 has a lower specified Charpy impact test temperature (−60∘𝐶) compared to Q690D (−20∘𝐶).

S690QL1 is a high-strength, quenched and tempered structural steel with excellent toughness, designed under the EN 10025-6 standard. Although it is most commonly supplied as rolled plate, forging can also be performed under strictly controlled thermal and mechanical conditions to achieve uniform strength and fine-grain microstructure.

S690QL1Chemical Composition

S690QL1Mechanical Property

S690QL1 steel plate characteristics:

S690QL1 adopts controlled rolling technology. From the chemical composition of the steel plate, it can be seen that the content of harmful elements S and P is relatively low, indicating that its steel quality is pure and its welding performance is good.

Application range of S690QL1 steel plate

S690QL1 steel plate is a high-strength structural steel plate, and used to manufacture plant, general construction and all kinds of construction machinery, such as drilling machines, electric shovels, electric wheel tippers, mining cars, excavators, loaders, bulldozers, all kinds of cranes, coal mine hydraulic supports and other mechanical equipment and other structural parts for mining and all kinds of engineering construction.

Q690D steel is a kind of low alloy high strength steel.Q690D steel is named because of its yield strength value.Q is the abbreviation of yield strength,that is,the yield strength of Q690D steel is 690 MPa.D indicates that the impact temperature of Q690D steel is - 20℃.

Mechnical property for GB/T 16270 Q690D steel plate:

Chemical composition for GB/T 16270 Q690D steel plate (Heat Analysis Max%)

Q690D steel plate applications:
Q690D steel plate has high strength, good plasticity and toughness, good weldability, good hot and cold properties.Q690D steel plate is mainly used for the manufacture of a variety of large-scale engineering structural components and construction machinery. Because of its high strength, good toughness, in order to ensure the strength, stiffness and reliability of the conditions, can reduce the weight of the components to meet the engineering components and equipment large-scale, lightweight requirements.

Q690 series steel grades are Q690C Q690D Q690E Q690F, and the equivalent EN standard steel grades are S690Q S690QL S690QL1.

GNEE steel's range of HSLA steels (high strength low alloy) are engineered to promote excellent high yield characteristics which in turn provide an extremely cost effective option for buyers. In many cases, the use of HSLA steel will reduce the volume of material required in a project without compromising the quality and safety of the installation because it allows the customer to reduce the material thickness.

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In addition to S690Q Steel Plate,GNEE Steel also supplies a variety of high-strength steel plates, such as A514 Grade F, A572 Grade 50, A588 Grade A, S355JR, S690Q, SS400, S690QL, Q345B, Q345E, etc. If you want to know more about other types of steel plates, you can call the consultation hotline at +8615824687445 or send an email to alloy@gneesteelgroup.com. You are welcome to consult us, and we are very willing to answer your questions.

FAQ

What is the difference between S690Q and S690QL?

S690Q: Minimum impact toughness tested at -20°C (30J average). → Typical Use: Cranes in temperate climates, quarry equipment. S690QL: Certified for -40°C and below (≥40J impact toughness). → Critical Use: Arctic pipelines, offshore platforms, mining vehicles in Siberia.

What grade is S690QL material?

S690QL is a high strength quenched and tempered steel grade that complies to steel specification EN 10025. The designation S690QL refers to a minimum yield strength of 690 MPa.

What is S690 grade steel?

S690 high yield & fine grain steel plate is a high strength, quenched and tempered fine-grain structural steel. Structural steel S690 is used in structures that must withstand very heavy loads. This grade is meant for structures where weight savings is important.

What is the equivalent of S690 steel?

Approximate equivalents
ASTM A514, EN 10149-2 Grade S700MC, AS/NZS 3579 Grade 700, AM 700, Bisalloy 80.

What is the price of S690QL material?

S690QL High Strength Steel Plates, Thickness: 5mm to 150mm at 5,600-13,500 CNY per tonne (approx. 5.6-13.5 CNY per kilogram)/440-900 USD per tonne (approx. 0.44-0.90 USD per kilogram)

What is the hardness of S690 QL steel?

S690QL steel stockholders and suppliers. S690QL is a quenched and tempered high strength steel supplied in full plates or cut pieces with delivery to the whole of the UK. With its high yield of minimum 690MPa it offers better strength than standard carbon steel grades.

What is the effective use of high strength S690 steel in construction?

The high strength S690 steels have an excellent strength-to-self-weight ratio, and they are highly efficient to be used in heavily loaded structures. Typical applications include piles and columns in buildings and supporting members in bridges.

What is the difference between S890QL and S690QL?

S690QL, S890QL, and S960QL are all water quenched and tempered steels that comply with the EN10025:6:2004 specification. These ultra high strength steels have a minimum yield strength of 690 MPa, 890 MPa, and 960 Mpa respectively, making them ideal for use in the haulage sector.

What is the difference between S700MC and S690ql?

The S700MC Steel is basically a structural steel plate developed especially for applications requiring high yield strength. They are used for several load bearing applications. The S690ql is a low alloy structural steel which is high in strength and comes with good weldability.

What is the yield strength of s690 steel?

690 MPa.

Yield strength of 690 MPa. Used in structures bearing extremely heavy loads, such as bridges, offshore drilling rigs and buildings, as well as in heavy construction equipment and cranes.