Quenching and tempering heat treatment carbon seamless steel pipe
The commonly used heat treatment processes for steel pipes mainly include quenching, tempering, normalizing and annealing. For example: the casing, oil pipe, drill pipe, line pipe, etc. in the special oil pipe, according to the level of the steel grade, the process of normalizing, normalizing and tempering, quenching and tempering is adopted accordingly; spheroidizing annealing of steel pipes for bearings Wait. The common quenching and tempering (QT) is a double heat treatment of quenching and high temperature tempering, and its purpose is to make the workpiece have good comprehensive mechanical properties. quenched and tempered steel has two categories: carbon quenched and tempered steel and alloy quenched and tempered steel. Whether it is carbon steel or alloy steel, its carbon content is strictly controlled. If the carbon content is too high, the strength of the workpiece after quenching and tempering is high, but the toughness is not enough. If the carbon content is too low, the toughness is improved and the strength is insufficient. In order to obtain good comprehensive performance of the quenched and tempered parts, the carbon content is generally controlled at 0.30~0.50%.Astm A193,Round Steel Tubing,Heat Treated Steel Tube,Heat Treated Steel Bar And Tube
Material
Alloy steell&Carbon steell
Sizes
OD range from 20mm to 100mm, Thickess: from 4mm to 20mm
Tolerances
Precision to h9, h10, h11
Roundness
75% of diameter tolerance
Straightness
Good straightness to 0.5mm/m
Surface roughness
Smooth to 0.8um
Mechanical properties
Yield strength and tensile strength can be improved
Shandong Le Ren Special Steel CO., Ltd. owns three factories to produce all kinds of steel rod, steel bar and finished steel products. Among three factories, one is to produce steel bars such as annealed, normalized and quenched and tempered steel bar and pipe, cold drawn, peeled, ground and polished steel bar etc; one is to produce threaded or knurled steel rod and steel bar; another one is to do steel bar, steel rods or steel pipe machining.
In the tactories, we have complete and advanced production, inspection and testing facilities such as shot blasting machines, cold drawing machines,straightening machines, annealing furnace, quenching and tempering furnaces, threading machines, cnc machines, welding machines etc, and inspections and testing facilities to inspect dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc. All of these, including more than twenty years production and exporting experiences, we can supply you good quality products and services.
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Production Certification
Inspection
Our factory is equipped with complete inspection and testing facilities to inspect steel bar dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc.
Packing & Delivery
Most of our steel bar are cold drawn, peeled, ground and polished steel bar which require good surface and straightness. So steel bar packing is very important to keep good quality. We use several kinds of steel bar packing according to your technical requirements.
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