Hollow rock-drill steel used for rolling the hollow rock-drilling rod is a special alloy steel containing Fe base, W, C, Si, Mn, Cr and V. Its advantages are long service life and high quality.
Hollow Hexagonal Drill Steel, is a rock drill steel or integral drill steel without tips. Hollow Drill Steel Bar is a type of steel specially used in drill rod manufacture, high intension and toughness.
Material: 95CrMo (Same as SANDBAR 20 or C253)
Diameter: Hex. 22mm, 25mm, 28mm, 32mm, 38mm.
Length: 800mm, 1600mm, 2400mm, 3200mm or any length according to your requirement.
Package: Wrapped with plastic knitting and then into bundles.
Integral drill rod without tip shank sizes 82.5 mm*22mm(3 1/4”*7/8”), 108mm*22mm(4 1/4”*7/8”), 108mm*25mm(4 1/4”*1”), 159,*25mm(6 1/4”*1). Lengths: 400mm to 6400mm(1’4”-21’). Head diameters: 27mm to 40mm.
Hollow Hexagonal Drill Steel has following advantages:
1. High fatigue strength and toughness, high intension.
2. High resistance to wear and permanent distortion.
3. Industrial process of heat treatment.
4. Uniform straightness, eliminating the need for straightening.
Hot Rolled Hexagonal Hollow Drill Steel
Steel Grade: 95CrMo
Ni: 0.25PCT MAX
S,P: 0.025PCT MAX
Cu: 0.30PCT MAX
Hollow drill steel reduces the expense of impact energy, improves the drilling speed and efficiency, also it can be used for drilling bore hole diameter from 30mm to 41mm usually. Each rods use premium quality alloy steel and advanced industrial process to assure high drilling performance.
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