Description

Technical Parameters

Product Overview

S690Q S690QL High Strength Steel Sheet is a quenched and tempered structural steel manufactured to EN 10025-6. It offers a minimum yield strength of 690 MPa, excellent strength-to-weight ratio, and reliable impact toughness. Widely used in cranes, mining equipment, heavy vehicles, bridges, and offshore engineering.

China high strength low alloy Distributors

CTL&SL

Grinding Polishing

Cutting

Beveling

Forming

Maching

Auto Welding

Heat treatment

Painting

Engineering Services

Technical Specifications

Item	Specification
Product Grade	S690Q, S690QL
Standard	EN 10025-6
Steel Number	S690Q: 1.8931; S690QL: 1.8928
Thickness	3-200 mm
Width	1,000-3,500 mm
Length	3,000-18,000 mm or as required
Thickness Tolerance	±1%
Delivery Condition	Quenched and Tempered (Q+T)
Edge Type	Mill Edge (ME), Trimmed Edge (TE)
Surface Condition	Hot Rolled, Shot Blasted, Painted, or Natural Surface

S690Q Chemical Composition

CEV

Max 0.2

Max 0.8

Max 1.7

Max 2

Max 0.025

Max 0.015

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 0.83

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V-type, Y-type, X-type and U-type grooves

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S690Q Mechanical Properties

Grade	Thickness	Min Yield	Tensile	Elongation	Min Impact Energy
S690Q	8mm-50mm	Min 690Mpa	770-940Mpa	14%	-20	Min 30J
	51mm-100mm	Min 650Mpa	760-930Mpa	14%	-20	Min 30J
	101mm-150mm	Min 630Mpa	710-900Mpa	14%	-20	Min 30J

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S690QL Mechanical Properties

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
S690QL	1.8931	690	650	630	770/940	760/930	710/900	14

Typical Applications

Mobile crane booms

Truck-mounted crane structures

Mining dump truck bodies

Excavator arms and booms

Heavy lifting equipment

Wind tower components

Bridge structural members

Offshore platform structures

Construction machinery frames

Material handling equipment

CTL & SL SERVICE

Steel Plate Leveling Machine

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Processing Services

Processing Service	Description
CNC Flame Cutting	Precision cutting for large structural components.
Plasma Cutting	Suitable for medium and thin sections with clean edges.
Laser Cutting	High-accuracy cutting for complex profiles.
Bevel Cutting	Edge preparation for welding applications.
Drilling	CNC hole processing according to drawings.
Bending	Cold forming within recommended bending radius.
Welding Preparation	Surface cleaning and groove machining before fabrication.
Shot Blasting	Removes scale and prepares the surface for coating.
Primer Painting	Temporary corrosion protection during transportation.

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Steel plate rolling

steel plate rolling services

Press Brake Forming

Quality Assurance

Inspection Process

Raw material chemical composition analysis (Spectrometer)
Steelmaking process verification
Plate dimension inspection
Thickness tolerance inspection
Surface defect inspection
Tensile strength testing
Yield strength testing
Elongation testing
Charpy V-notch impact testing (-20°C / -40°C)
Ultrasonic Testing (UT)
Hardness testing
Flatness inspection
Identification and traceability verification

China hsla steel sheet Distributors

China hsla structural steel Manufacturers

China high strength steel sheet Suppliers

Certifications

Certification	Meaning
ISO 9001:2015	Quality Management System
ISO 14001:2015	Environmental Management System
EN 10204 3.1	Mill Test Certificate issued by manufacturer
EN 10204 3.2	Third-party witnessed inspection certificate
CE Marking	Compliance with applicable European regulations where required

Packaging & Shipping

Export Packing: Steel strips bundling with waterproof paper and seaworthy packing.

Rust Protection: Anti-rust oil or protective coating available upon request.

Identification: Heat number, grade, size, and bundle markings for full traceability.

Loading Method: Container loading for standard sizes; bulk vessel for oversized plates.

Shipping Method: FCL, LCL, break bulk vessel, or air freight for samples.

Documents: Commercial Invoice, Packing List, MTC EN 10204 3.1/3.2, Certificate of Origin, Bill of Lading, and inspection reports when required.

Press Brake Forming

Steel Plate Rolling

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Groove cutting robot

groove cutting machine

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FAQ

Q: What is the difference between S690Q and S690QL?

A: S690Q is impact tested at -20°C, while S690QL is tested at -40°C, making S690QL suitable for colder operating environments.

Q: Can third-party inspection be arranged before shipment?

A: Yes. SGS, BV, TUV, DNV, LR, and other designated inspection agencies are available upon request.

Q: Can different grades and sizes be loaded into one container?

A: Yes. Mixed loading of different grades, thicknesses, and dimensions is supported to optimize freight costs.

Q: Do you keep S690Q and S690QL in stock?

A: Common dimensions are regularly stocked, while special sizes can be produced according to order requirements.

Q: Are samples available?

A: Yes. Small stock samples are available. Customers typically cover courier charges.

Q: What are the equivalent grades of S690Q and S690QL?

A: Common equivalents include Q690D, Q690E, ASTM A514 Grade Q, and SNCM490H, although chemical composition and technical requirements vary by standard.

Q: What welding recommendations do you provide?

A: Low-hydrogen consumables, controlled heat input, and appropriate preheating based on plate thickness are recommended for optimal weld quality.

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