GB/T 16270 Q890C Introduce
GB/T 16270 Q890C Carbon and Low-alloy High-strength Structural Steel Plate is one of the most widely used steels available and belongs to a class of materials known as high strength-low alloy (HSLA) steel. It is the primary structural steel used in construction and civil engineering projects where lightweight and high strength are necessary components. GB/T 16270 Q890C Carbon and Low-alloy High-strength Structural Steel Plate is composed of several different components, including carbon, manganese, silicon, nickel, chromium, and molybdenum. All of these components interact with each other and the individual elements combine to form an incredibly strong substance.
Smelting temperature:1126°C - 1522°C
Application:Quenched and tempered steel plate for high strength structure
GB/T 16270 Q890C Material Chemical Composition
The chemical composition of the GB/T 16270 Q890C steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | - | 0.1200 |
| Titanium (Ti) | - | 0.0500 |
| Silicon (Si) | - | 0.8000 |
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0250 |
| Nickel (Ni) | - | 2.0000 |
| Niobium (Nb) | - | 0.0600 |
| Molybdenum (Mo) | - | 0.7000 |
| Manganese (Mn) | - | 2.0000 |
| Copper (Cu) | - | 0.5000 |
| Chromium (Cr) | - | 1.5000 |
| (CEV) | - | 0.7200 |
| Carbon (C) | - | 0.2000 |
| Boron (B) | - | 0.0050 |
GB/T 16270 Q890C Material Mechanical Properties
The mechanical properties of the GB/T 16270 Q890C steel are as follows:
| YieldRp0.2 | ≤ 129 (MPa) |
| TeileRm | ≤ 279 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 143 |
GB/T 16270 Q890C Material Thermal Properties
The thermal performance parameters of the GB/T 16270 Q890C steel are as follows:
| Temperature (°C) | 12 | 694 | 581 |
| Modulus of elasticity (GPa) | - | 722 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 243 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 323 |
| Poisson’s coefficient, ν | - | - | 421 |
GB/T 16270 Q890C Material Machining Technology
GB/T 16270 Q890C steel is an alloyed steel, whose properties are determined based on the composition of the alloying elements. It is composed of iron, manganese, carbon, silicon, molybdenum, and chromium. These elements give the steel certain characteristics, such as high tensile strength, good toughness, and excellent weldability. The tensile strength is the resistance of the steel to being pulled apart, and it ranges from 370 to 500 MPa. The toughness of the steel is determined by the Brinel Hardness, which for GB/T 16270 Q890C steel is between 180 and 250 HB. The steel also has good weldability, meaning that it can be joined with other metals using welding.