ASTM A312 TP304 stainless steel seamless pipe heat treatment
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ASTM A312 TP304 Annealing treatment:
Annealing treatment aims to eliminate stress and deformation generated during welding and restore the plasticity and toughness of the material. The annealing temperature is usually between 1000-1050°C, and the material is slowly cooled after a period of heat preservation to reduce internal stress and improve the overall performance of the material.
ASTM A312 TP304 Solution treatment:
Solution treatment is to heat the stainless steel seamless pipe to a high temperature so that the carbide is fully dissolved in the austenite, and then quickly cool (quench) to obtain a uniform austenite structure. The temperature of solution treatment is usually between 1050-1150°C, and the cooling method can be water cooling or oil cooling, depending on the thickness and composition of the pipe.
ASTM A312 TP304 Aging treatment:
Aging treatment is carried out after solution treatment, with the purpose of re-precipitating carbides and improving the hardness and strength of the material. Aging treatment is usually carried out at a lower temperature, such as 450-850°C, and then cooled naturally or rapidly after a period of heat preservation.
Purpose and effect of heat treatment of ASTM A312 TP304 seamless pipe
The main purpose of heat treatment is to eliminate welding stress, improve the mechanical properties of materials, improve corrosion resistance and overall structural stability. Through annealing, solution treatment and aging treatment, TP304 stainless steel seamless pipe can obtain excellent corrosion resistance, good processability and high temperature stability, suitable for various industrial applications.
GNEE is dominated by stainless steel products, including stainless steel bars, austenitic stainless steel pipes, high temperature alloy steel pipes, duplex stainless steel pipes, nickel-based alloy pipes, condenser pipes, U-shaped pipes, nuclear power pipes, stainless steel pipe fittings, flanges, valves, etc.
Specifications include 6-2020 × 0.8-60mm, 16-25 and length up to 33m. The company has 25 sets of various mechanical equipment for precision manufacturing of steel pipes, including 15 cold rolling mills, 10 cold drawing machines, and two sets of natural gas heat treatment furnaces.
