Precision Seamless Steel Pipe Outer Diameter 8 mm - 400 mm Wall Thickness 0.8 mm - 35 mm
Precision Seamless Steel Pipe Outer Diameter 8 mm - 400 mm Wall Thickness 0.8 mm - 35 mm
Precision Seamless Steel Pipe Outer Diameter 8 mm - 400 mm Wall Thickness 0.8 mm - 35 mm
Precision Seamless Steel Pipe Outer Diameter 8 mm - 400 mm Wall Thickness 0.8 mm - 35 mm
Precision Seamless Steel Pipe Outer Diameter 8 mm - 400 mm Wall Thickness 0.8 mm - 35 mm

Precision Seamless Steel Pipe

Product Name: Precision Seamless Steel Pipe
Outer Diameter: 8 mm – 400 mm
Wall Thickness: 0.8 mm – 35 mm
Tolerance: ±0.05 mm
Technology: Cold Rolled/Cold Drawn
Standards: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel Material: 20# (American Standard 1020/German Standard 1.0402 C22), 45# (American Standard 1045, German Standard 45), 20Cr, 40Cr, ST52, ST45, ST37.4, Q345B, etc.
Delivery Status: BK, BKW, NBK, GBK, BKS
Product Specifications: In Stock/Customized
Minimum Order Quantity: 3 tons
FOB Price Range: US$398-1600
Payment Terms: TT (30%-50% deposit, balance due before container loading)
Packaging Standard: Standard seaworthy packaging
Origin: China
Applications: Widely used in machining, automotive industry, and hydraulic equipment.
Advantages of High-Precision Seamless Steel Pipes: 1. Smaller tolerance range
2. Good surface treatment
3. Excellent performance
4. High utilization rate
Category:

Precision Seamless Steel Pipe

Thickness±10% (smallest±0.12mm)
0.5 -0.8 1 -1.2 1.5 -1.8 2
Size outer diameter Allowable deviation Inner diameter (nominal value and allowable deviation)
4 ±0.10 3±0.30 2.4±0.30 2±0.30
6 5±0.25 4.4±0.25 4±0.25 3.6±0.30
8 7±0.20 6.4±0.20 6±0.20 5.6±0.30 5±0.30 4.4±0.35 4±0.35
10 9±0.15 8.4±0.15 8±0.20 7.6±0.25 7±0.25 6.4±0.30 6±0.30
12 11±0.15 10.4±0.15 10±0.15 9.6±0.20 9±0.20 8.4±0.25 8±0.25
14 13±0.10 12.4±0.10 12±0.10 11.6±0.15 11±0.15 10.4±0.20 10±0.20
16 15±0.10 14.4±0.10 14±0.10 13.6±0.10 13±0.10 12.4±0.15 12±0.15
25 24±0.10 23.4±0.10 23±0.10 22.6±0.10 22±0.10 21.4±0.10 21±0.10
-26 25±0.10 24.4±0.10 24±0.10 23.6±0.10 23±0.10 22.4±0.10 22±0.10
28 27±0.10 26.4±0.10 26±0.10 25.6±0.10 25±0.10 24.4±0.10 24±0.10
30 29±0.10 28.4±0.10 28±0.10 27.6±0.10 27±0.10 26.4±0.10 26±0.10
35 ±0.25 34±0.15 33.4±0.15 33±0.15 32.6±0.15 32±0.15 31.4±0.15 31±0.15
38 37±0.15 36.4±0.15 36±0.15 35.6±0.15 35±0.15 34.4±0.15 34±0.15
40 39±0.15 38.4±0.15 38±0.15 37.6±0.15 37±0.15 36.4±0.15 36±0.15
45 43±0.20 42.6±0.20 42±0.20 41.4±0.20 41±0.20
50 48±0.20 47.6±0.20 47±0.20 46.4±0.20 46±0.20
55 53±0.25 52.6±0.25 52±0.25 51.4±0.25 51±0.25
60 58±0.25 57.6±0.25 57±0.25 56.4±0.25 56±0.25
70 ±0.35 68±0.30 67.6±0.30 67±0.30 66.4±0.30 66±0.30
76 74±0.35 73.6±0.35 73±0.35 72.4±0.35 72±0.35
80 ±0.35 78±0.35 77.6±0.35 77±0.35 76.4±0.35 76±0.35
90 ±0.40 87±0.40 86.4±0.40 86±0.40
100 ±0.45 96.4±0.45 96±0.45
110 ±0.50 106±0.50 106±0.50
120 116±0.50 116±0.50
150 ±0.75
180 ±0.90
200 ±1.0
Chemical composition(%) of precision pipe’s commin grade
Standard Grade C Si Mn s p Cr
GB/T 699
GB/T 3639
GB3077
GB/T1591
GB/T 8163-2018		 10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 \
20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 \
35# 0.32~0.39 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 \
45# 0.42~0.50 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 \
40Cr 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 0.08~1.10
25Mn 0.22~0.29 0.17~0.37 0.70~1.00 ≤0.035 ≤0.035 ≤0.25
Q345B ≤0.20 ≤0.50 ≤1.7 ≤0.035 ≤0.035 ≤0.3
37Mn5 0.30~0.39 0.15~0.30 1.20~1.50 ≤0.015 ≤0.020 \
Mechanical Properties of seamless steel pipe:
Steel material Tensile Strength Mpa Yield strength Mpa Elongation % Hardness Steel material
20# ≥510 ≥245 ≥25 ≤156 HB 20#
45# ≥647 ≥355 ≥16 ≤HRB322 45#

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