GB/T carbon structural performance characteristics and applications

GangHao
Performance characteristics
Use examples

Q195
High plasticity and toughness and welding performance, good pressure processing performance, but low strength
Load small parts, spacers, rivets, the anchor bolt, colter, funnel, roof, low carbon steel wire, plates, welded pipe, bars, split cotters, and stamping parts, components, etc

Q215
Performance and Q195 close, but plastic is poorer
Thin, galvanizing steel wire, steel wire nets, welded pipe, the anchor bolt, rivets, washers, plough plate, and the carburized parts, components, etc

Q235
Good strength and cold, heat pressure processing performance sex and welding is a bit poor performance
Widely used in the manufacture of sheet, steel bar, steel structure with all kinds of steel, building structure, Bridges, engine, mechanical parts, carburizing or carbon nitrogen were permeability parts, components, support, force not big pole, connecting rod, pin, shaft, screw, nut, rings, etc

Q255
Good strength and cold, heat pressure processing performance sex and welding is a bit poor performance
Steel structure with all kinds of steel, steel, steel plates, Bridges, the required strength is not high mechanical parts, such as bolt, key, rocker, axle, bars, etc

Q275
With high strength, hardness, better abrasion resistance, certain welding performance and machinability, small parts can quenching strengthening, plasticity and toughness Q255 below
Reinforced concrete structure reinforcement, steel components, the demand of higher intensity parts, such as gear, shaft, wheel, key, the brake lever, connecting rod, hook bolts, nuts, agricultural machinery, conveying chain and with steel chain link