Products FAQ
Can S890QL high-strength steel plates be welded directly?
Yes, but the carbon equivalent is relatively high. Thick plates require preheating; follow an approved WPS and select compatible low-hydrogen welding consumables.
Does your S890Q high-strength steel plate come with an MTC?
Yes. All of our S890Q high-strength steel plates come with an EN 10204 3.1 factory test certificate; if an EN 10204 3.2 certificate is required, we can arrange for inspections by third-party inspection agencies such as SGS, BV, or TÜV upon request.
What is the difference between S890Q, S890QL, and S890QL1?
All three grades comply with the EN 10025-6 standard and have the same minimum yield strength of 890 MPa. The difference lies in the guaranteed temperature for an impact energy of ≥30 J in the Charpy V-notch impact test:
S890Q: -20°C
S890QL: -40°C
S890QL1: -60°C
In terms of strict control over the chemical composition—specifically phosphorus (P), sulfur (S), and other impurities—S890QL1 > S890QL > S890Q.
What are the applications of S960QL high-strength structural steel plates?
S960QL high-strength structural steel plates are primarily used in cryogenic and heavy-load applications, including the manufacture of construction machinery for high-latitude cold regions, large-span steel structure projects at -40°C, polar energy and mining equipment, and lifting and transportation facilities in cold regions. This product complies with the EN 10025-6 standard and serves as a core ultra-high-strength structural material for use in extremely cold environments.
What is the difference between S960Q and S960QL steel plates?
The key difference between the two lies in their low-temperature impact toughness:
S960Q: Minimum impact energy absorption of 30 J at -20°C; suitable for low-temperature environments above -20°C;
S960QL: Minimum impact energy absorption of 30 J at -40°C; suitable for low-temperature environments at or above -40°C, with superior resistance to extremely low temperatures.
Both grades have the same minimum yield strength (960 MPa) and basic mechanical properties; the appropriate grade can be selected based on the project’s environmental temperature requirements.
What are the applications of S960Q high-strength structural steel plates?
S960Q high-strength structural steel plates are primarily used in the manufacture of heavy-duty construction machinery, large-span, high-stiffness steel structures, heavy-duty lifting and transportation equipment, and facilities in the mining and energy industries. They are suitable for high-load, high-stress conditions at ambient and slightly lower temperatures and are a core ultra-high-strength structural material that complies with the EN 10025-6 standard.
What certifications and test reports can you provide?
We can provide official MTC factory test reports, ISO 9001 quality management system certification, and authoritative third-party inspection reports from SGS, BV, and TÜV. All documents are internationally recognized and can be used to support bidding for projects in cold regions worldwide, engineering acceptance inspections, and customs clearance for cross-border trade.
Can S550QL1 high-strength steel plate be used at -60°C?
Yes. S550QL1 has been professionally certified to possess ultra-low-temperature impact toughness at -60°C, with a minimum impact energy absorption of 27 J at that temperature. It will not experience brittle fracture or degradation of structural performance in extremely cold environments, fully meeting the construction and equipment operation requirements for ultra-low-temperature projects in high-latitude and polar regions.
What are the applications of S550QL1 high-strength steel plates?
S550QL1 high-strength steel plates are primarily used in engineering projects in extremely cold regions, polar infrastructure, heavy machinery manufacturing in high-latitude areas, and low-temperature-resistant lifting and energy equipment. They are specifically designed for extreme operating conditions as low as -60°C and serve as a core, highly reliable structural material for industrial projects in cold regions that meet the EN 10025-6 standard.
Do you offer custom processing services for S550Q steel plates?
Yes. We provide cutting services for thickness, width, and length, as well as surface treatment and further processing, and can offer customized solutions based on customers’ engineering drawings.
