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ASTM A312 TP304 Hollow Bars, With Thick Walls, Used To Manufacture Flanges And Machinery
Description
HOLLOW BAR represents the optimal form for flange production from round bars.
Flange/Forging Machining: When producing large-diameter flanges, using solid round bars directly requires drilling a huge hole, resulting in significant material waste and time consumption. Using HOLLOW BAR, the material is already close to its final shape, requiring only minimal internal and external turning, leading to high material utilization and low processing costs.
Large Sleeves/Machinery Parts: Used in manufacturing bearing rings, large hydraulic cylinder barrels, machine bushings, and other parts requiring high wall thickness and strength. The wall thickness is thicker than ordinary pipes, but not yet reaching the wall thickness level of typical hollow bars.
Chemical Composition (%)
Element
TP304
Carbon (C)
≤ 0.08
Manganese (Mn)
≤ 2.00
Phosphorus (P)
≤ 0.045
Sulfur (S)
≤ 0.030
Silicon (Si)
≤ 1.00
Chromium (Cr)
18.0 – 20.0
Nickel (Ni)
8.0 – 11.0
Iron (Fe)
Balance
Mechanical Properties (Room Temperature)
Property
TP304
Tensile Strength, Rm (min)
515 MPa (75 ksi)
Yield Strength, Rp0.2 (min)
205 MPa (30 ksi)
Elongation (in 2" or 50mm), min
35%
Hardness (HBW), max
183
Application
Usage Mode
Application Focus
Key Advantage
As Pipe (A312)
Fluid transmission, chemical processing, sanitary lines
Corrosion resistance, ease of welding, ready-to-use
As Blank (Hollow Bar)
Flanges, valve bodies, large fittings, mechanical parts
Near-net shape, minimal machining, high material utilization
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...