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Grade 4130 Chromoly drilling pipe
, high-strength steel oil well pipe
, oil & gas drilling steel pipe
Grade 4130 Chromoly Oil Drilling Pipe , High-Strength Steel Pipe for Oil & Gas Well Drilling
Grade 4130 Chromoly Oil Drilling Pipe , High-Strength Steel Pipe for Oil & Gas Well Drilling
Description
This AISI 4130 30CrMo Chromoly Alloy Oil Drilling Pipe represents a premium-grade, heavy-wall seamless steel pipe specifically engineered for the most demanding casing and production applications in the oil and gas industry. Manufactured from chromium-molybdenum alloy steel conforming to both AISI 4130 and 30CrMo specifications, this robust piping solution combines exceptional mechanical strength with superior corrosion resistance, making it ideal for critical downhole applications where reliability and longevity are paramount.
The pipe's heavy-wall design provides enhanced collapse resistance and superior structural integrity, enabling it to withstand extreme external pressures, high axial loads, and severe mechanical stresses encountered in deep well and high-pressure applications. The chromium-molybdenum alloy composition (typically containing 0.28-0.33% carbon, 0.8-1.1% chromium, and 0.15-0.25% molybdenum) delivers an optimal balance of high tensile strength, excellent toughness, and improved fatigue resistance compared to conventional carbon steel pipes.
This seamless chromoly pipe undergoes precise heat treatment processes including quenching and tempering to achieve mechanical properties typically featuring yield strengths of 550-750 MPa and tensile strengths of 700-900 MPa, while maintaining excellent impact toughness at various temperature ranges. The heavy-wall construction ensures maximum resistance to deformation under load and provides extended service life in both casing and production applications.
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 |
Grade 4130 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 |
Grade 4130 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 |
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
Production tubing in high-pressure wells
Casing strings for deep well applications
Surface casing and intermediate casing
High-pressure injection and production lines
Downhole tools and completion equipment
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