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Q690
Qilu
Product Description
Q690D Q690E Steel Plate
1: Q690D Steel Introduction
Q690D is a high-strength steel plate, mainly composed of ferrite and pearlite. Among them, ferrite is the soft phase and pearlite is the hard phase, and this two-phase organization makes Q690D have better toughness and strength at the same time. In addition, Q690D also contains a small amount of bainite and martensite.Q690D steel plate has high strength and hardness, its tensile strength and yield strength can be up to more than 1,000MPa and more than 800MPa respectively. At the same time, Q690D also has good toughness and ductility, and its elongation and impact toughness are high. These excellent mechanical properties enable Q690D to meet a variety of complex and demanding applications.
Q690D Steel Stock In Warehouse
2: Q690D Quality Standard
Q690D steel according to GB/T 1591.
3: Q690D Steel Equivalent
Country | China | Japan | Germany |
Standard | GB/T 1591 | JIS G3135:1986 | EN10025-2 |
Grade | Q690D/690E | SHY685 | S690Q / 1.8931 |
4: Q690D Steel Chemical Composition
Grade | C | Si | Mn | P | S | Cr |
Q690D | 0.18 | 0.60 | 2.00 | 0.030 | 0.025 | 1.00 |
5: Q690D Steel Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
6: Q690D Steel Overviews
Size | Round | Dia 6-1200mm |
Plate/Flat/Block | Thickness | |
Width | ||
Process | EAF+LF+VD+Forged+Heat treatment(optional) | |
Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
Delivery condition | Forged; Hot rolled; Cold drawn | |
Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
Payment terms | T/T;L/C;/Money gram/ Paypal | |
Trade terms | FOB; CIF; C&F; etc.. | |
Delivery time | 30-45 days | |
7: Q690D Steel Application
Construction Machinery Field: widely used in excavators, loaders, bulldozers and other structural parts of construction machinery. These equipments need to withstand large loads and impacts during operation, and the high strength and toughness of Q690D steel plate can ensure its stability and safety in harsh environments.
Mining Machinery Field: used in the manufacture of structural parts, able to withstand greater impact and wear, to ensure the stability and reliability of the equipment in harsh environments.
Bridge Construction Field: widely used in bridge construction, such as main girders, piers, beams and other key load-bearing structures. Its high-strength characteristics can effectively enhance the carrying capacity of bridges, reduce structural deadweight and extend service life.
Construction: Used in the manufacture of steel columns, steel beams, steel plate walls and other load-bearing parts to ensure the overall stability and safety of the building.
Machinery Manufacturing Field: Used in the manufacture of key components of heavy-duty machinery, such as frames, axles, transmission devices, etc., to meet the demanding requirements of the equipment on the material performance, improve the durability and reliability of the equipment.
Ship and Vehicle Manufacturing Field: Used in the manufacture of hull structures, decks, bulkheads, as well as frames, axles and other components to ensure stability and safety under extreme conditions.
Energy Field: Used in engineering structures such as wind power generation towers, oil and gas transmission pipelines and nuclear power plant containment to provide reliable support and security.
8: Q690D Steel Heat Treatment
Quenching is to heat the steel plate to the austenitizing temperature (about 850°C) and then cool it rapidly to room temperature to obtain martensitic organization. Tempering is the quenched steel plate again heated to a certain temperature (about 400 ℃) and held for a certain period of time (about 2h), and then cooled to room temperature, in order to eliminate internal stresses and improve the toughness and strength of the steel plate. Through the reasonable control of heat treatment process, Q690D steel plate with excellent performance can be obtained.
9: Q690D Steel Tolerance
Diameter(mm) | Tolerance | ||
Forged Steel Round Bar | 80-600 | Black Surface:0~+5 | Rough Machined or Turned:0~+3 |
650-1200 | Black Surface:0~+15 | Rough Machined or Turned:0~+3 | |
Hot Rolled Steel Round Bar | 16-310 | Black Surface:0~+1 | Peeled:H11 |
Cold Drawn Steel Round Bar | 6-100 | Black Surface:H11 | Peeled:H11 |
10: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
For Cold Drawn bar, usually the delivery condtion is cold drawn, annealed/QT, peeled/black surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, milled/black surface.
For hot forged plate, usually the delivery condition is hot forged, normalized/annealed, milled/black surface.
