Q960E High Strength QT Steel Plate

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional Q960E High Strength QT Steel Plate manufacturers and suppliers in China. Welcome to wholesale customized Q960E High Strength QT Steel Plate at competitive price from our factory. Good service and quality products are available.

 

Q960E high strength QT steel plate

 

‌Q960E high strength steel plate is a low alloy high strength structural steel plate with high strength, high toughness and excellent welding performance. It is widely used in machinery manufacturing, construction engineering, electricity, automobile manufacturing, metal products and other fields.

 

• Q: Quenched and tempered steel (Yield strength).
• 690: Minimum yield strength of 690 MPa (for thickness ≤16 mm).
• E: Indicates impact toughness at -40°C (V-notch, ≥27 J).

 

 

 

• Optimized Weldability – Low‑carbon microalloyed design: CEV 0.45–0.55% (~15% lower than conventional 960 MPa). For plates ≤50 mm at ≥0°C: preheat 100–150°C, heat input 15–25 kJ/cm; weld joint strength coefficient ≥0.9 and –40°C impact toughness qualified.

 

• Wear Margin & Weather Resistance – Corrosion rate ~0.1–0.2 mm/year (similar to structural steel); shot blasting/painting/galvanizing extends life 3–8×. Yield strength 960 MPa gives >2× deformation resistance of Q355; no hardfacing needed for fretting/low‑speed sliding wear, reducing processing costs.

 

• Controllable Cold Forming – Elongation 12–15% (min. 10%). Cold bend: mandrel = 3× thickness for ≤16 mm, 5× thickness for 16–50 mm, no cracks. Lower cold‑working barriers than cast/high‑alloy steels of equivalent strength, enabling flexible forming solutions.

 

 

GNEE Steel's Q960E high-strength steel plate, S690QL1 steel sheet, S355J2 alloy steel and ASTM A709 Grade 50 plate meet the highest quality and performance standards and can meet all your product needs.

 

In addition, the hot-rolled steel plates we provide are available in a variety of sizes and can be customized according to specific requirements. At the same time, we can also provide EN 10204 3.1/3.2 Original Mill Test Certificate and accept third-party testing.

 

 

Our Q960E steel plates are produced via a full-process controlled production line to ensure consistent batch performance:

 

• Smelting: Hot metal pretreatment → BOF smelting → LF refining → VD vacuum degassing, strictly controlling harmful elements such as P and S, and reducing gas content to improve steel purity.
• Rolling & Heat Treatment: TMCP controlled rolling and cooling combined with offline quenching and high-temperature tempering, ensuring uniform through-thickness properties with an intra-plate strength difference controlled within 5%.
• Inspection: Full-range dimensional inspection, batch mechanical property testing, spectral composition analysis, and optional ultrasonic flaw detection for each plate.

 

 

Product Name	High Strength Low Alloy Steel Plates (HSLA)
Length	1m-12m or as required
Width	1m-3m or as required
Thickness	8mm-150mm or as required
Standard	ASME,ASTM,DIN,JIS,GB,EN,etc.
Technique	Hot rolled
Surface Treatment	Clean, blasting and painting according to customer requirement
Thickness tolerance	±0.5~±1.5mm
Material	Q960E
MOQ	1tons.We also can accept sample order.
Shipment time	Within 7-15 workdays after receiving deposit or L/C
Export packing	Waterproof paper, and steel strip packed. Standard Export Seaworthy Package.Suit for all kinds of transport,or as required

 

 

Element	C	Si	Mn	P	S	Cr	Ni	Mo	V	Nb	Ti	B
Standard Limit (≤, %)	0.20	0.80	2.00	0.020	0.010	1.50	2.00	0.70	0.12	0.06	0.05	0.0050
Typical Production Value (%)	0.15~0.18	0.20~0.40	1.20~1.50	≤0.015	≤0.005	0.30~0.60	0.20~0.50	0.20~0.40	0.04~0.08	0.02~0.04	0.01~0.02	≤0.0030

 

 

Thickness (mm)	Yield Strength (≥, MPa)	Tensile Strength (MPa)	Elongation A (≥, %)	-40℃ Charpy V Impact (≥, J)
t ≤ 50	960	980 – 1150	10	27
50 < t ≤ 100	940	980 – 1150	10	27
100 < t ≤ 150	900	980 – 1150	9	27

 

 

Standard System	Grade	Delivery Condition	Low Temperature Impact	Typical Application
GB/T 16270	Q960E	Quenched + Tempered	-40℃	Construction machinery booms, mining hydraulic supports
EN 10025-6	S960QL	Quenched + Tempered	-40℃	Lifting equipment, heavy steel structures
EN 10025-6	S960QL1	Quenched + Tempered	-60℃	Extreme cold environment structures
ASTM	A514 Grade B	Quenched + Tempered	-40℃ (typical)	Pressure vessels, heavy machinery frames

 

 

 

Q960E ultra-high strength steel is designed for heavy-load and lightweight structures that require a high strength-to-weight ratio:

• Construction Machinery: telescopic booms, chassis frames and outriggers of truck cranes and large excavators
• Mining Equipment: hydraulic roof supports, mining truck frames, shearer structural components
• Lifting & Transportation: port machinery girders, heavy lifting beams, container spreaders
• Special Pressure Equipment: high-pressure gas cylinders, core structural parts of special pressure vessels
• Heavy Steel Structures: key stress components of large-span space trusses and heavy-duty bridges

 

 

 

• Quenching and tempering (QT) heat treatment in full accordance with GB/T 16270
• -40℃ Charpy V-notch low temperature impact test as standard requirement
• Customized stricter control on specific chemical elements available upon request
• Original mill test certificate issued in EN 10204 3.1 / 3.2 format with full traceable data
• Optional ultrasonic flaw detection complying with GB/T 2970, NB/T 47013, EN 10160, ASTM A435 / A577 / A578 standards
• Custom cutting, beveling and surface treatment services available
• Third-party inspection by SGS, BV, TÜV and other authoritative agencies is fully accepted

 

 

To reduce your secondary processing cost and on-site construction period, we provide full-range customized processing services:

• Precision Cutting: CNC flame / plasma cutting for irregular shapes, with cutting surface roughness ≤ Ra25
• Bevel Preparation: V-type, X-type, K-type bevel processing to match on-site welding requirements
• Surface Pretreatment: Shot blasting up to Sa2.5 grade, epoxy zinc-rich primer or anti-rust painting to extend outdoor storage life
• Forming Support: Cold bending and rolling within the allowable bending radius, with professional process parameter guidance provided

 

 

GNEE steel offers a wide range of grades to meet various strength and performance requirements.

 

• ASTM:A573 Grade 70,A709 Grade 50,A514 Grade B,etc.
• ASME:SA573 Grade 70,SA709 Grade 50,SA514 Grade B,etc.
• EN:S355JR,S355J0,S355K2,S355N,S355J2,S420N,S460N,S460Q,S460QL,S500Q,S500QL,S550Q,S500QL,S690Q,S690QL,S690QL1,S890Q,S890QL,S890QL1,S960Q,S960QL,etc.
• DIN:ST52-3,etc.
• JIS:SS490,SS540,SM490,etc.
• GB:Q355B,Q355D,Q390B,Q390D,Q420B,Q420D,Q460D,Q460E,Q500D,Q500E,Q550D,Q550E,Q620D,Q620E,Q690D,Q690E,Q890D,Q890E,Q960D,Q960E

 

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What is the difference between Q960D and Q960E?

The core difference lies in low temperature impact performance: Q960D guarantees impact toughness at -20℃, while Q960E guarantees impact performance at -40℃, which is more suitable for cold regions and low-temperature service scenarios.

 

Does Q960E steel require preheating before welding?

Yes. For plates with thickness ≥ 20mm, preheating at 100–150℃ is recommended, matched with low-hydrogen welding consumables and controlled heat input of 15–25 kJ/cm to avoid cold cracking.

 

What is the maximum available thickness of Q960E steel plate?

Conventional supply thickness ranges from 8mm to 150mm, and customized thickness beyond the range can be negotiated by order.

 

What is the equivalent EN grade for Q960E?

Q960E has equivalent performance to S960QL under EN 10025-6 standard, both are 960MPa grade quenched and tempered high strength steel with -40℃ low temperature toughness guarantee.

 

 

 

 

 

 

 

We support multi-specification, multi-brand weather resistant steel plate customization, if you have Q960E high strength quenched and tempered steel plate or other corten steel plate product customization needs, please contact us!

 

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