Q390 Carbon Sheet low alloy high strength structural steel plate.
Q390B
Q390C
Q390D
Q390E
The JBL brand Q390 steel has excellent comprehensive mechanical properties, as well as good welding performance, cold and hot processing performance, and corrosion resistance. Grades C, D, and E of this steel exhibit excellent low-temperature toughness. It is mainly used in ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery, and other welding structural components with higher loads.
| mark | Impact test temperature | Impact energy requirements (longitudinal) | (P)/ (S) upper limit | Metallurgical/Process characteristics | Typical application scenarios |
|---|---|---|---|---|---|
| Q390B | 20℃ (normal temperature) | ≥34J | ≤0.035% / ≤0.035% | Basic level, no forced microalloy refinement | Normal temperature factory buildings, light machinery, non-critical load-bearing parts |
| Q390C | 0℃ | ≥34J | ≤0.035% / ≤0.035% | Impurity control is slightly strict and a certain degree of grain refinement is required | Winter construction in the Yangtze River Basin, ordinary pressure vessels, and heavy-duty bases |
| Q390D | -20℃ | ≥34J | ≤0.030% / ≤0.030% | Forced microalloying (V/Nb/Ti), controlled rolling or normalizing | Cold region Bridges, wind power towers, offshore platforms, and mining machinery |
| Q390E | -40℃ | ≥27J (Message Transfer Part ≥34J) | ≤0.025% / ≤0.025% | High purity, strict normalizing treatment, strong resistance to layered tearing | LNG storage tanks, nuclear power facilities, and critical structures at extremely cold/high altitudes |
Q390 high-strength steel plate has a yield strength of 390 MPa, and it also possesses excellent welding properties and low-temperature toughness. This material can maintain high strength even in low-temperature environments, is less prone to brittle fracture, and is suitable for use in harsh conditions.
Q390 high-strength plate – How much is its price?
The price of Carbon Sheet ASTM Q390 High-Strength Steel Plate Cold Rolled is not fixed but is influenced by various factors such as market supply and demand, as well as the cost of raw materials.
Q390 What are the differences between high-strength plates and ordinary plates?
The yield strength of FusionSally Custom Size High Strength Low Alloy Steel Plate Q390 is 3 to 4 times that of ordinary steel. Q390 low alloy high strength structural steel plate has a higher strength. It is suitable for scenarios with high loads. Due to the cost of alloys and complex manufacturing processes, the price of Q390 High Strength Steel Plate is usually 30% to 50% higher than that of ordinary steel.
Q390 High Yield Strength Steel – How to identify the quality?
The surface of the Q390 Carbon Steel Plates and High-Strength Steel Plate is free of cracks and delamination. It can be verified through the material certification documents.
What are the available specifications for Q390D steel plates?
According to the load-bearing requirements, the thickness range of High Strength Steel Plate Q390 is usually 3 to 100 mm, and the width is 1200 to 2000 mm.
Q390 High-Strength Plate Welding Process?
It is necessary to use low-hydrogen type welding rods. Preheat the weld area to 100-150℃ before welding to prevent cold cracks.
Q390 Steel Plate chemical composition?
High Strength Normalizing Q390 Alloy Steel Plate Mechanical Properties？
What is the production process for Q390 high-strength steel plates?
High Strength Normalizing Q390 Alloy Steel Plate involves processes such as steelmaking, rolling dan heat treatment.
How does the Q390 high-strength plate compare with high-strength steels such as Q420 and Q460?
Q390 Structural Steel Plate has lower processing costs and better process compatibility.
Which specification is the most commonly used in the Q390 (B/C/D/E) market?
Q390D
Q390 Low Alloy High Strength Steel Plate Market Quality Acceptance Specifications?
GB/T 1591-2018
Q390 High-Strength Plate （Laser precision cutting）
Q390 Steel Plate （plasma cutting）
High Strength Normalizing Q390 Alloy Steel Plate（flame cutting）
（cold bending processing）
（hot bending processing）
Q390 Structural Steel Plate（roll forming）
Q390 Low Alloy High Strength Steel Plate（stamping processing）
Q390 High Strength Low Alloy Structural Steels（drilling）
Q390 High Strength Low Carbon Steel Plate（groove processing）
Q390 B/C/D/E low alloy high strength structural steel plate（precision welding）
（sandblasting for rust removal）
0.15mm-300mm Q390 High Carbon Steel Plate For Heavy Machine（painting）
（galvanizing）
Kontrol penuh atas produk memungkinkan kami untuk memastikan pelanggan kami menerima harga dan layanan dengan kualitas terbaik. Hubungi kami untuk penawaran gratis, JBLSTEEL akan memberikan solusi yang tepat untuk proyek Anda.
English English Русский Deutsch Español 简体中文 Português Italiano 日本語 Bahasa Indonesia 한국어 Français Nederlands العربية Tiếng Việt ไทย Tagalog Bahasa Melayu Polski Türkçe Português do Brasil हिन्दी Қазақ тілі বাংলা 
Hausa Kiswahili አማርኛ فارسی Ελληνικά Română Українська 
