Q1150
Alloy SteelLow-alloy high-strength structural steel; yield strength (MPa) equals the grade number. Microalloyed (Nb/V/Ti) with TMCP; used in welded structures, cranes, vehicles, bridges, pressure equipment.
Mechanical Properties
Yield 1150 MPa min Tensile 1200-1450 MPa Elongation 9% min
Chinese Standard
GB 32286.1-2015
Applications
High-strength welded structural and pressure-equipment steel
Available Forms
Plate, bar, tube, sections
Uses
Cranes, mining machinery, hydraulic supports, pressure vessels, bridges, heavy vehicles, offshore
Heat Treatment
Usually supplied as-rolled / TMCP (thermo-mechanical control process); no mandatory heat treatment; low carbon equivalent for weldability
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