Specifications
Description
North Steel manufactures a wide range of precision cold drawn seamless alloy steel tubes for drilling industry, including mother tubes for wireline drill rods, casings, inner tubes, outer tubes, couplings and etc. North Steel’s premium quality tubes could flexibly satisfy different exploring depth and methods of coupling.
Advantages
Excellent microstructure
High straightness
Low residual hoop stresses
Tight tolerances, low eccentricity
Size Range
O.D 30-139.7 mm, WT 3-19mm
Executive Standard
GB/T9808 Seamless Steel Tubes for Drilling
GB/T 16950, Geological core drilling tools
DIN2391, Seamless precision steel tubes
EN10305-1, Steel tubes for precision applications Part 1: Seamless cold drawn tubes
ASTM A519, Seamless Carbon and Alloy Steel Mechanical Tubing
DCDMA, Diamond Core Drilling Manufacturers Association
BS4019, Specification for rotary core drilling equipment
JIS G3465, Seamless Steel Tubes for Drilling
According to customer’s specific requirements
Steel Grade
45MnMoB, 30CrMnSiA, 30CrMo, 42CrMo, 40Mn2 ； 34CrMo4, 42CrMo4 ； 4130, 4135, 4140, 1541 and etc.
Delivery Condition
Cold drawn and stress relieved (+SR) (BKS)
Normalized (+N) (NBK)
Quenched and Tempered (QT)
Dimensional Range
SIZE | Wireline Drill Rod | SIZE | Casing | ||
Outer Diameter (mm) | Inner Diameter (mm) | Outer Diameter (mm) | Inner Diameter (mm) | ||
Nom. | Nom. | Nom. | Nom. | ||
A | 44.45 | 35.05 | AW | 57.1 | 48.4 |
B | 55.55 | 46.05 | BW | 73.0 | 60.3 |
N | 69.85 | 60.45 | NW | 88.9 | 76.2 |
H | 88.90 | 77.80 | HW | 114.3 | 101.6 |
P | 114.30 | 101.60 | PW | 139.7 | 127.0 |
S | 139.70 | 125.50 | |||
SIZE | Outer Tube | Inner Tube | ||
Outer Diameter (mm) | Inner Diameter (mm) | Outer Diamete (mm) | Inner Diameter (mm) | |
Nom. | Nom. | Nom. | Nom. | |
A | 46.05 | 36.50 | 32.54 | 28.58 |
B | 57.15 | 46.05 | 42.85 | 38.10 |
N | 73.03 | 60.33 | 55.58 | 49.99 |
H | 92.08 | 77.80 | 73.03 | 66.80 |
P | 117.48 | 101.60 | 95.25 | 88.90 |
S | 142.88 | 125.50 | 117.00 | 111.00 |
Chemical Composition
Steel Grade | C | Si | Mn | P | S | Cr | Mo | B |
45MnMoB | 0.43-0.48 | 0.17-0.37 | 1.05-1.35 | ≤0.020 | ≤0.015 | 0.20-0.25 | 0.001-0.005 | |
4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 | |
1541 | 0.36-0.44 | - | 1.35-1.65 | ≤0.040 | ≤0.050 | |||
30CrMnSiA | 0.28-0.34 | 0.90-1.20 | 0.80-1.10 | ≤0.020 | ≤0.015 | 0.80-1.10 | ||
4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 |
Mechanical Properties
Steel Grade | Deliver Condition | Min Tensile Strength (Mpa) | Min Yield Strength (Mpa) | Min Elongation (%) | Hardness (HRC) |
45MnMoB | Normalizing（+N） | 790 | 600 | 14% | - |
4130 | Stress relieving（+SR） | 813 | 690 | 15% | ≥24 |
1541 | Stress relieving（+SR） | 813 | 690 | 15% | ≥24 |
30CrMnSiA | Quenched and tempered（QT） | 850 | 750 | 14% | 26 - 31 |
4140 | Quenched and tempered （QT） | 950 | 850 | 14% | 28 - 33 |
