Borehole steel pipes are specialized high-strength steel pipes with a wall thickness of 3mm or more, designed for borehole exploration operations. Depending on geological environments and formations, wall thicknesses typically range between 6mm and 12mm.
The standard torque range for drill pipes is 7,000–8,000 Newton meters (Nm). However, in actual drilling operations, the torque value may be adjusted according to geological conditions, drill bit type, and drilling rig performance to ensure safety and efficiency.
|
Standard |
Grade |
Chemical Composition (wt%) |
||||||||
|
C |
Si |
Mn |
P |
S |
Cu |
Ni |
Cr |
Mo |
||
|
ASTM A519 |
SAE 1020 |
0.18-0.23 |
/ |
0.30-0.60 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
|
|
SAE 1030 |
0.28-0.34 |
0.60-0.90 |
≤0.040 |
≤0.050 |
||||||
|
SAE 1045 |
0.43-0.50 |
/ |
0.60-0.90 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
/ |
|
|
SAE 1524 |
0.19-0.25 |
1.35-1.65 |
≤0.040 |
≤0.050 |
||||||
|
SAE 1541 |
0.36-0.44 |
/ |
1.35-1.65 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
/ |
|
|
SAE 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 |
|||
|
EN 10297-1 |
E275 |
≤0.21 |
≤0.35 |
≤1.40 |
≤0.030 |
≤0.035 |
/ |
/ |
/ |
/ |
|
E315 |
≤0.21 |
≤0.30 |
≤1.50 |
≤0.030 |
≤0.035 |
/ |
||||
|
E355 |
≤0.22 |
≤0.55 |
≤1.60 |
≤0.030 |
≤0.035 |
|||||
|
41Cr4 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
0.90-1.20 |
||||
|
34CrMo4 |
0.30-0.37 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
/ |
0.15-0.30 |
0.90-1.20 |
||
|
42CrMo4 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
/ |
0.15-0.30 |
0.90-1.20 |
||
|
JIS G3445 |
STKM13A |
≤0.25 |
≤0.35 |
0.30-0.90 |
≤0.040 |
|||||
|
STKM13B |
≤0.25 |
≤0.35 |
0.30-0.90 |
≤0.040 |
/ |
|||||
FAQ
Q: What standards do your seamless steel tubes meet?
A: Our seamless steel tubes comply with international standards such as ASTM A106, ASTM A53, DIN 2391, EN 10210, and GB/T 8162. Specific standards depend on the customer's application and regional requirements.
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