Corten Steel Plate
Atmospheric corrosion resistant plate that builds its own protective rust instead of paint
Specifications
Alloy Steel Sheet
S690 Q690 High Strength Structural Steel Plate
Quenched and tempered 690 MPa plate for boom arms lifting frames and welded structures
S690 is a high strength structural steel plate with a minimum yield strength of 690 MPa, where the S stands for structural and the 690 states the yield figure. Machine builders working on loaders, bulldozers, excavators and lifting equipment specify it when a welded structure has to carry more load without growing heavier. Designing at 690 MPa instead of a mild structural grade lets the section come down, which cuts plate weight, welding volume and counterweight on the finished machine. Plate is supplied in 0-100mm thickness in the Q+T, hot rolled or normalized condition and cut to the size on your drawing.
- Product Name — S690 High Strength Steel Plate
- Minimum Yield Strength — 690 MPa
- Grade — S690 Q690 E690 1.8931
- Standards — BS EN GB AiSi ASTM DIN JIS
- Sheet Thickness — 0.1mm-10mm or customized as required
Why It Is Specified
Key Benefits of S690 High Strength Structural Steel
690 MPa Minimum Yield in a Weldable Plate
The minimum yield strength of 690 MPa is the whole reason to buy this grade. It lets a structural member carry the design load at a smaller section than a conventional structural plate.
Lighter Welded Structures
A thinner section means less plate to buy, less weld metal to deposit and less mass for the machine to carry around. On mobile equipment that weight comes straight back as payload or fuel.
Four Grade Designations Covered by One Line
The European Chinese and material number designations for this strength level are supplied from the same material line, so a mixed drawing pack can be filled without splitting the purchase order.
Delivery Condition To Suit the Fabrication
Q+T, hot rolled and normalized conditions are available so the plate arrives in the state your welding and forming procedures were written for.
Cut and Formed Before It Reaches You
Bending, welding, decoiling, cutting and punching are done in house, so a boom side plate can arrive profiled and punched instead of as a rectangle you have to nest and burn.
Documented Grade on Arrival
Each shipment carries a mill test certificate against the ordered grade, which is what a structural inspector asks for when the plate goes into a load bearing weldment.
Problems It Solves
What This Material Removes From Your Process
Structures Getting Heavier To Get Stronger
Adding thickness in a conventional grade adds mass everywhere it is added. A 690 MPa minimum yield lets the designer hold the load at a smaller section instead.
Welding Hours Driven by Plate Thickness
Thick plate means big weld preparations and many passes. Thinner high strength sections cut the deposited weld volume and the labor that goes with it.
Grade Names That Do Not Match Across Drawings
One drawing writes S690, the next Q690, the next 1.8931. All four designations are supplied from one line so nothing has to be re sourced per project.
Nesting and Burning Every Profile In House
Cutting punching and bending are available before shipment, so plate arrives closer to the finished part and your burning table is freed up.
Inspectors Asking For Grade Evidence
The mill test certificate ships with the plate so the structural file is complete when the weldment is signed off.
Application Scenarios
Where It Is Used
Loader and Excavator Boom Structures
Boom and arm side plates, bosses and dipper bodies where the section has to carry digging loads without becoming heavier.
Bulldozer Frames and Push Arms
Track frames, push arms and blade backing structures taking high bending loads in a compact envelope.
Lifting Machinery and Crane Booms
Telescopic sections and lattice members where reducing dead weight directly increases what the machine can lift.
Mining Machinery Weldments
Chassis, frames and support structures on mining equipment that are welded heavy and loaded hard.
Large Ships and Bridge Members
Large welded structural components in shipbuilding and bridge work where high strength plate lets spans and sections be optimized.
Power Station and Pressure Equipment Structures
Power station equipment, medium and high pressure boilers and high pressure vessels along with locomotive and vehicle structures.
Who It Is For
Buyers Who Specify This Product
- Construction machinery design engineers specifying boom and frame plate at 690 MPa
- Heavy fabrication shops buying profiled high strength plate for welded machine structures
- Crane and lifting equipment builders reducing boom dead weight to raise rated capacity
- Mining equipment manufacturers ordering chassis and frame plate to a cutting list
- Shipyard and bridge fabricators sourcing high strength plate for large welded components
- Purchasing managers consolidating S690 Q690 E690 and 1.8931 requirements into one order
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | S690 High Strength Steel Plate |
|---|---|
| Minimum Yield Strength | 690 MPa |
| Grade | S690 Q690 E690 1.8931 |
| Standards | BS EN GB AiSi ASTM DIN JIS |
| Sheet Thickness | 0.1mm-10mm or customized as required |
| Plate Thickness | 0-100mm |
| Width | 0-1000m or customized as required |
| Size | Customized Size |
| Technique | Q+T hot rolled normalized |
| Surface | Natural or painted |
| Application | Loader bulldozer excavator |
| Processing Service | Bending welding decoiling cutting punching |
| Certificate | Mill Test Certificate |
| Place of Origin | China |
Technical Features
- Minimum yield strength 690 MPa
- Grades S690 Q690 E690 and 1.8931
- Standards BS EN GB AiSi ASTM DIN and JIS
- Plate thickness 0-100mm and sheet 0.1mm-10mm
- Width 0-1000m or customized as required
- Delivery condition Q+T hot rolled or normalized
- Surface natural or painted
- Processing covers bending welding decoiling cutting and punching
Materials
- High strength low alloy structural steel with a minimum yield strength of 690 MPa
- Grade equivalents S690 Q690 E690 and material number 1.8931
- Supplied quenched and tempered hot rolled or normalized
Certification
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Hot rolling to the ordered plate thickness
Quenching and tempering or normalizing to reach the 690 MPa yield level
Leveling and surface finishing natural or painted
Cutting to the ordered plate or profile size
Punching and bending to the drawing
Welded sub assembly where requested
Marking packing and loading for export
Quality Control
Checks Before It Ships
- Mill test certificate covering the ordered grade and yield strength
- Grade and delivery condition checked against the purchase order before cutting
- Thickness verified across the ordered range before processing
- Profile and hole positions checked against the drawing after cutting and punching
- Surface condition inspected for the ordered natural or painted finish
- Packing and edge protection checked before container loading
Customization
What We Can Change on Your Order
- Plate cut to profile against your nesting or cutting list
- Grade supplied as S690 Q690 E690 or 1.8931 to match the drawing
- Delivery condition selected as Q+T hot rolled or normalized
- Bending to the boom or frame profile before shipment
- Hole punching to your drilling drawing
- Natural or painted surface on request
Comparison
S690 High Strength Structural Steel Against the Alternatives
| Ordinary structural carbon steel plate | A minimum yield of 690 MPa allows a thinner section for the same load, so the finished weldment is lighter and uses less weld metal. |
|---|---|
| Thicker plate in a conventional structural grade | Adding thickness adds mass and weld preparation everywhere it is added, while the higher yield grade holds the load in a smaller section. |
| Abrasion resistant wear plate | S690 is bought for structural yield strength rather than surface hardness, so it belongs in the load bearing frame while wear plate goes on the contact face. |
| Stiffened built up sections in mild steel | A single high strength plate member replaces a stiffened mild steel build up, cutting the number of parts and welds in the assembly. |
Use Guide
Specifying Handling and Welding Notes
- Design to the 690 MPa minimum yield rather than to a nominal figure taken from a general catalog
- Follow a welding procedure written for quenched and tempered high strength steel including preheat on heavier sections
- Control heat input so the properties in the heat affected zone are not lost
- Allow a larger bend radius than mild steel and bend across the rolling direction where the part permits
- State the delivery condition you need as Q+T hot rolled or normalized when you enquire
- Order the mill test certificate with the plate so the structural record is complete at handover
Questions Buyers Ask
S690 High Strength Structural Steel FAQ
What is the yield strength of S690 plate?
The minimum yield strength is 690 MPa. The S denotes structural and the 690 is the yield figure in megapascals.
Which grades do you supply against an S690 enquiry?
S690 Q690 E690 and 1.8931 all come from the same material line. Send the designation on your drawing and it will be matched.
How thick can you go?
Plate is supplied in 0-100mm and thinner sheet runs from 0.1mm-10mm. Size is customized, so parts can be cut rather than shipped as full plates.
Is the plate supplied quenched and tempered?
Q+T, hot rolled and normalized conditions are all available. Tell us which one your welding and forming procedures were qualified for.
Can you cut and punch the boom plates for us?
Yes. Bending, welding, decoiling, cutting and punching are offered, so plate can arrive profiled and punched to your drawing.
Do you issue a mill test certificate?
A mill test certificate is issued against the ordered grade and ships with the material. Ask for the mill test certificate when you place the order.
Can we test a sample before committing to a production quantity?
Samples are available. Confirm the grade, thickness and piece size you want to evaluate and we will tell you what can be released.
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