Stm R780 Steel Tube for Geological Drill

• After-sales Service: Technical/Sample/Quality
• Type: Seamless
• Technique: Hot Rolled
• Material: Alloy Steel
• Od Outsider Diameter: 30 to 189 mm
• Wt Wall Thickness: 30 to 60 mm
• Model NO.: R780
• Trademark: SHUNFU
• Origin: China
• Production Capacity: 100000 Tons Per Year

Product Description

STM R780 Steel Tube For Geological Drill

STM-R780 is a type of seamless steel tube commonly used in various industrial applications, including drilling. It possesses specific mechanical and physical properties that make it suitable for such purposes. STM-R780's specific properties make it suitable for various industrial applications where a seamless steel tube with high strength, good impact resistance, and other relevant characteristics is required.
 

For Geological Drill

STM-R780 steel tubes are used in geological drilling, including diamond core drilling, which is a common method for extracting rock and mineral samples from the Earth's subsurface. These tubes are selected for their specific properties and suitability for geological drill applications. Here are some key points about STM-R780 steel tubes for geological drill:

1. Seamless Construction: STM-R780 steel tubes are seamless, meaning they are manufactured without welding seams along their length. This seamless design provides structural integrity and resistance to pressure, making them suitable for drilling into various geological formations.

2. Mechanical Strength: STM-R780 steel tubes offer a good balance of mechanical properties, including a yield strength of approximately 520 MPa and a tensile strength of around 780 MPa. This ensures they can withstand the stresses and forces encountered during drilling operations.

3. Impact Resistance: With an impact resistance (KV/Ku) of 43, STM-R780 steel tubes can absorb energy and resist fracturing when subjected to sudden shocks or impacts while drilling.

4. Elongation: These tubes have an elongation capacity of up to 43%, allowing them to deform plastically before breaking. This property is valuable in drilling applications.

5. Reduced Cross-Section: STM-R780 steel tubes exhibit a reduction in cross-section on fracture (Z) of 14%, indicating their ability to maintain structural integrity under stress.

6. Heat Resistance: Geological drilling can generate heat due to friction and the geological conditions encountered. STM-R780 steel tubes are designed to withstand elevated temperatures.

7. Precision: STM-R780 tubes are manufactured with precise specifications to ensure accurate and controlled drilling. Precision is crucial for obtaining reliable geological samples.

8. Corrosion Resistance: Depending on the geological conditions, drilling environments may contain corrosive substances. Proper surface treatments or coatings can enhance the tubes' corrosion resistance.

9. Compatibility: These tubes are designed to work seamlessly with geological drilling equipment, ensuring efficient and effective drilling operations.

It's important to collaborate with drilling engineers and specialists to select the appropriate STM-R780 steel tubes based on the specific geological conditions and drilling requirements of a project. Factors such as tube size, thickness, heat treatment, surface treatment, and quality control measures can significantly impact their performance in geological drilling applications.
 

Chemical

Chemical Composition
Carbon (C)	0.36-0.43%
Silicon (Si)	0.17-0.37%
Manganese (Mn)	0.9-1.2%
Phosphorus (P)	0.00035
Sulfur (S)	0.00035

 

Properties

Mechanical Properties
Yield Strength (MPa)	520
Tensile Strength (MPa)	780
Impact KV/Ku (J)	43
Elongation A (%)	43
Reduction in Cross-Section on Fracture Z (%)	14
Physical Properties
Modulus of Elasticity (GPa)	232
Mean Coefficient of Thermal Expansion (10-6/°C) between 20°C and 100°C	32.2
Thermal Conductivity (W/m·°C)	24.3
Specific Thermal Capacity (J/kg·°C)	321
Specific Electrical Resistivity (Ω mm²/m)	442
Density  (kg/dm³)	7.85