AISI 4130 30CrMo Chromoly Alloy Oil Drilling Pipe , Heavy-Wall
Steel Pipe for Geothermal Wells Drilling
Description
This AISI 4130 (30CrMo) chromoly alloy heavy-wall drilling pipe is
engineered for extreme geothermal well drilling. Its superior
tensile strength, torsional resistance, and fatigue durability
withstand high-temperature environments (200-400°C), corrosive
brines, and abrasive formations.
The heavy-wall design ensures exceptional pressure integrity and
compression resistance in extended-reach drilling. The
chromium-molybdenum composition provides excellent resistance to
H₂S corrosion and thermal cycling stresses.
Precision-manufactured through seamless extrusion and heat
treatment, each pipe undergoes rigorous testing to international
standards. Ideal for both drilling and casing applications in
geothermal wells, it delivers extended service life and reduced
downtime in the most challenging high-temperature operations.
Specification
| Specifications | ASTM, ASME and API |
| Size | O.D.: 4 to 219mm W. T.: 0.5 to 20mm |
| Specialized in | Large Diameter Size |
| Length | Within 13500mm |
| Type | Seamless |
| Shape | Round |
| End | Plain End, Beveled End, Treaded |
30CrMo Pipe Chemical Composition
| Element | Content (%) |
| Iron, Fe | 97.03 – 98.22 |
| Chromium, Cr | 0.80 – 1.10 |
| Manganese, Mn | 0.40 – 0.60 |
| Carbon, C | 0.280 – 0.330 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
30CrMo Pipe Mechanical Properties
| Properties | Metric | Imperial |
| Tensile strength, ultimate | 560 MPa | 81200 psi |
| Tensile strength, yield | 460 MPa | 66700 psi |
| Modulus of elasticity | 190-210 GPa | 27557-30458 ksi |
| Bulk modulus (Typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (Typical for steel) | 80 GPa | 11600 ksi |
| Poissons ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 21.50% | 21.50% |
| Reduction of area | 59.6 | 59.60% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (Converted from Brinell hardness) | 240 | 240 |
| Hardness, Rockwell B (Converted from Brinell hardness) | 95 | 95 |
| Hardness, Rockwell C (Converted from Brinell hardness, value below
normal HRC range, for comparison purposes only.) | 17 | 17 |
| Hardness, Vickers (Converted from Brinell hardness) | 228 | 228 |
| Machinability (Annealed and cold drawn. Based on 100% machinability
for AISI 1212 steel.) | 70 | 70 |
30CrMo Tube Equivalent
| STANDARD | UNS | CN | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| AISI 4130 | G41300 | 30CrMo | 1.7218 | – | 25CrMo4 | JIS G4105 | BS 970 | – |
Key Features and Benefits
Enhanced Collapse Resistance: Heavy-wall design withstands extreme
external pressures
Superior Mechanical Strength: High yield and tensile strength for
deep well applications
Excellent Fatigue Resistance: Performs reliably under cyclic
loading conditions
Improved Corrosion Resistance: Chromium content provides better
corrosion resistance than carbon steel
Seamless Reliability: Homogeneous microstructure without weld
defects or imperfections
Typical Applications
Mine blasting
Water well drilling
Geothermal wells drilling
Fore poling
Coal
Nonferrous metal mining projects
