Q500q STEEL – STRUCTURAL STEEL

Q500q STEEL – STRUCTURAL STEEL

Q500q is a high-strength structural steel commonly used in heavy-duty construction projects like bridges and high-rise buildings. The “Q” in its name stands for “Quenching,” a heat treatment process that enhances the steel’s strength and toughness. The number “500” represents its minimum yield strength of 500 MPa, ensuring it can handle significant loads. This steel is known for its excellent mechanical properties, including high tensile strength, good toughness, and resistance to impact and fatigue.

Описание

What is Q500q

Q500q steel is composed of approximately 97-99% iron and 1-3% alloying elements such as carbon, manganese, silicon, and chromium. It is typically available in solid, flat, or plate forms and is commonly used in a greyish metallic color. Q500q is known for its high strength, good toughness, and excellent fatigue resistance. It is primarily used in fields like bridge construction, high-rise buildings, and heavy machinery. The steel is processed through hot rolling, which enhances its mechanical properties. Q500q steel can be further classified into subgrades based on thickness and mechanical requirements, such as Q500qC, Q500qD, and Q500qE.

Characteristics of Q500q Steel

Q500q steel is highly valued for its exceptional load-bearing capacity, making it ideal for heavy-duty structures like bridges and skyscrapers. It offers superior corrosion resistance, especially in harsh environments such as offshore platforms. Its high toughness allows it to withstand significant impacts, making it suitable for heavy machinery and high-rise buildings. With an optimal strength-to-weight ratio, Q500q steel supports efficient and cost-effective designs. Its versatility across various applications, from bridge components to critical infrastructure, and reliability under extreme conditions.

Химический состав

Элемент	Процент (%)
Углерод (С)	0.18 max
Кремний (Si)	0,50 макс.
Марганец (Mn)	1.00 – 1.60
Фосфор (P)	0,030 макс.
Сера (S)	0,030 макс.
Хром (Cr)	0,30 макс.
Никель (Ni)	0,50 макс.
Медь (Cu)	0,30 макс.
Ванадий (V)	0,10 макс.
Молибден (Mo)	0,10 макс.
Ниобий (Nb)	0,07 макс.

Физические свойства

Свойство	Метрический	Империал
Плотность	7,85 г/см³	0,283 фунта/дюйм³
Температура плавления	1425-1460°С	2597-2660°F
Теплопроводность	50,2 Вт/м·К	29 БТЕ·фут/ч·фут²·°F
Удельная теплоемкость	486 Дж/кг·К	0,116 БТЕ/фунт·°F
Коэффициент теплового расширения	11,7 × 10⁻⁶ /°С	6,5 × 10⁻⁶ /°F
Электрическое сопротивление	0,2 мкОм·м	0,12 мкОм·фут

Механические свойства

Свойство	Метрический	Империал
Предел прочности	520-680 МПа	75,400-98,600 psi
Предел текучести	420 МПа	60,900 psi
Твёрдость по Бринеллю (HB)	170-210 HB	170-210 HB
Твердость по Роквеллу (HRC)	20-25 HRC	20-25 HRC
Твёрдость по Виккерсу (HV)	180-220 В	180-220 В
Удлинение	16-20%	16-20%
Модуль упругости	200 ГПа	29 000 кфунтов на кв. дюйм

After QT processing, Q500q steel exhibits the following typical mechanical properties:

Свойство	Метрический	Империал
Предел прочности	580-720 MPa	84,200-104,400 psi
Предел текучести	500-600 МПа	72 500–87 000 фунтов на кв. дюйм
Ударная вязкость	≥ 34 J (at -20°C)	≥ 25 ft·lbf (at -4°F)
Удлинение	15-18%	15-18%
Уменьшение площади	≥ 55%	≥ 55%
Модуль упругости	200 ГПа	29 000 кфунтов на кв. дюйм

Отрасли и приложения

Промышленность	Продукция
Автомобильный	Chassis Components, Structural Frames, Suspension Systems, Reinforcement Bars
Строительство мостов	Girders, Trusses, Deck Plates, Pylons
Критическая инфраструктура	Power Plant Boilers, Offshore Platform Legs, Refinery Piping, Chemical Plant Frames
Тяжелая техника и оборудование	Excavator Arms, Bulldozer Blades, Crane Booms, Loader Frames
Высотные здания	Columns, Beams, Braces, Reinforced Concrete Cores
Судостроение	Hull Plates, Bulkheads, Frames, Decks
Железнодорожный	Rails, Bridges, Track Components, Wheel Assemblies
Добыча полезных ископаемых	Mining Truck Frames, Drilling Equipment, Conveyor Systems, Ore Crushers

Обработка

Q500q Heat Treating Instructions:

Закалка: The steel is rapidly cooled from a high temperature to lock in a hard microstructure.
Темперирование: The steel is reheated to a lower temperature to reduce brittleness and improve ductility.
Controlled Parameters: Specific temperatures and times are carefully chosen based on the desired mechanical properties.

Q500q Surface Finish:

Горячее цинкование: The steel is coated with zinc to enhance corrosion resistance.
Рисование: Provides both protection and an aesthetic finish, customizable in color and texture.
Powder Coating/Anodizing: Additional protective coatings that enhance durability and resistance to environmental damage.
Custom Surface Treatments: Other surface finishes can be applied based on specific application requirements.

Custom grades of Q500q steel can be produced to meet specific requirements.

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ВОПРОС 1

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