Type of tempering
Low temperature tempering (150-250 degrees)
The hardness after tempering is generally HRC58-64.
Medium temperature tempering (250-500 degrees)
The hardness after tempering is generally HRC35-50.
High temperature tempering (500-650 degrees)
The hardness after tempering is generally HB200-330
20# precision steel pipe has no oxide layer on the inner and outer walls, withstands high pressure, no leakage, high precision, high finish, no deformation in cold bending, no cracks in flaring, flattening, and anti-rust treatment on the surface. It is widely used in precision steel pipes for hydraulic systems, injection molding Precision steel pipes for machinery, precision steel pipes for hydraulic machines, steel pipes for shipbuilding, EVA foam hydraulic machinery, seamless steel pipes for precision hydraulic cutting machines, shoe-making machinery, hydraulic equipment, high-pressure oil pipes, hydraulic oil pipes, ferrule joints, steel pipes Joints, rubber machinery, forging machinery, die-casting machinery, construction machinery, high-pressure steel pipes for concrete pump trucks, sanitation vehicles, automotive industry, shipbuilding industry, metal processing, military industry, diesel engines, internal combustion engines, air compressors, construction machinery, agricultural and forestry machinery etc., can completely replace the imported 20# precision steel tube GB3639/T 20# precision steel tube of the same standard.
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