China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
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PRODUCTS DETAILS

Basic Info.

Outer Diameter
219mm-3620mm, or as Required.
Thickness
5mm-25.4mm, or as Required.
Length
3m-12m, or as Required.
Grade
API 5L: Psl1/Psl2 Gr.a, Gr.B, X42, X46, X52
Delivery Time
7-15 Days
Transport Package
Standard Sea-Worthy Package or as Required
Specification
As requirement
Trademark
DELONG
Origin
Shandong
HS Code
7222400000
Production Capacity
5000 Tons/Month

Product Description

China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
 
Square tubes are classified according to their cross-sectional shapes: simple cross-section square tubes: square tubes and rectangular tubes. After the process is processed, it is rolled into strip steel. Generally, the strip steel is unpacked, flattened, crimped, and welded into a round tube, then the round tube is rolled into a square tube, and then cut to the required length. According to the production process, the square tube is divided into: hot-rolled seamless square tube, cold-drawn seamless square tube, extruded seamless square tube, and welded square tube. Rectangular pipes are divided into ultra-thick-walled rectangular pipes, thick-walled rectangular pipes and thin-walled rectangular pipes according to their wall thickness.

China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
Product Square and Rectangular Steel Pipe
Material Carbon Steel
Grade GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B,  Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C, Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E
EN:  S185, S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q
ASTM:  Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade 42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80
JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE
Standard ASTM, DIN, ISO, EN, JIS, GB, etc.
Surface Galvanized, 3PE, painting, coating oil, steel stamp, drilling, etc.
Ends Plain ends
Specification OD: 20*20-500*500mm ; 10*20-300*500mm, or as required.
Thickness: 1.0-30.0mm, or as required.
Length: 2-12m, or as required.
Pipe ends Plain, Beveled, Threaded, Socket with holes, With PVC clap/ coupling/ clamp
Application Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural greenhouses, automobiles Industry, railway, highway guardrail, container frame, furniture, decoration, steel structure, etc.
Tolerance ±1%
MOQ 1 ton
Supply Ability 5000 tons / month
Lead Time 7-15 working days after the receipt of 30% deposit
Payment Terms 30%T/T Advance + 70% Balance
Price Terms FOB, CFR, CIF, EXW
Packing Standard sea-worthy package or as required


Mechanical character & Chemical element of normal material:
Material Q195 C Mn Si S P  
Chemical 0.06-0.12 0.25-0.50 ≤0.30 ≤0.050 ≤0.045  
Composition Tensile strength: 315-430(Mpa)
(%) Yield strength:195(Mpa)
  Elongation:33
  Q235 C Mn Si S P  
  0.12-2.0 0.3-0.70 ≤0.30 ≤0.045 ≤0.045  
  Tensile strength: 375-460(Mpa)
  Yield strength:235(Mpa)
  Elongation:26
  Q345 C Mn Si S P V
  ≤0.20 ≤1.70 ≤0.55 ≤0.040 ≤0.040 0.02-0.15
  Tensile strength: 470-630(Mpa)
  Yield strength:345(Mpa)
  Elongation:21


 
Rectangular Hollow Section Square Hollow Section
Size Thickness Size Thickness Size Thickness
mm mm mm mm mm mm
50 X 25 2 120 X 40 3 20 x 20 2
50 X 25 2.5 120 X 40 3.6 20 x 20 2.5
50 X 25 3 120 X 40 4 25 x 25 2
50 X 30 2.5 120 X 40 5 25 x 25 2.5
50 X 30 3 120 X 40 6 25 x 25 3
50 X 30 3.2 120 X 40 6.3 30 x 30 2.5
50 X 30 4 120 X 60 3 30 x 30 3
60 X 40 2.5 120 X 60 3.6 40 x 40 2
60 X 40 3 120 X 60 4 40 x 40 2.5
60 X 40 3.2 120 X 60 5 40 x 40 3
60 X 40 4 120 X 60 6 40 x 40 4
80 X 40 3 120 X 60 6.3 50 x 50 2
80 X 40 3.2 120 X 80 3 50 x 50 2.5
80 X 40 4 120 X 80 4 50 x 50 3
80 X 60 2.5 120 X 80 5 50 x 50 4
80 X 60 3 120 X 80 6 50 x 50 5
80 X 60 3.6 120 X 80 6.3 60 x 60 3
80 X 60 4 150 X100 3 60 x 60 4
80 X 60 5 150 X100 4 60 x 60 5
90 X 50 2.5 150 X100 5 70 x 70 3
90 X 50 3 150 X100 6 70 x 70 3.6
90 X 50 3.6 150 X100 6.3 70 x 70 5
90 X 50 4 160 X 80 3 80 x 80 3
90 X 50 5 160 X 80 4 80 x 80 3.6
100 X 40 3 160 X 80 5 80 x 80 5
100 X 40 3.6 160 X 80 6 80 x 80 6
100 X 40 4 160 X 80 6.3 90 x 90 3
100 X 40 5 200 X 100 4 90 x 90 3.6
100 X 50 3 200 X 100 5 90 x 90 5
100 X 50 3.6 200 X 100 6 90 x 90 6
100 X 50 4 200 X 100 6.3 100 x 100 4
100 X 50 5 200 X 100 8 100 x 100 5
100 X 50 6 200 X 100 10 100 x 100 6
100 X 50 6.3 200 X 100 12.5 100 x 100 8
100 X 60 3 200 X 100 16 100 x 100 10
100 X 60 3.6 250 X 150 6.3 120 x 120 5
100 X 60 4 250 X 150 8 120 x 120 6
100 X 60 5 250 X 150 10 120 x 120 8
100 X 60 6 250 X 150 12.5 120 x 120 10
100 X 60 6.3 250 X 150 16 150 x 150 5
100 X 80 3 300 X 200 6.3 150 x 150 6
100 X 80 3.6 300 X 200 8 150 x 150 8
100 X 80 4 300 X 200 10 150 x 150 10
100 X 80 5 300 X 200 12.5 180 x 180 6
100 X 80 6 300 X 200 16 180 x 180 8
100 X 80 6.3 400 X 200 10 180 x 180 10
    400 X 200 12.5 180 x 180 12.5
    400 X 200 16 200 x 200 6
    450 X 250 10 200 x 200 8
    450 X 250 12.5 200 x 200 10
    450 X 250 16 200 x 200 12.5
        250 x 250 8
        250 x 250 10
        250 x 250 12.5
        300 x 300 8
        300 x 300 10
        300 x 300 12.5


Chemical & Mechanical Properties of Carbon Steel Square Pipes
Standard Grade Chemical Components (%) Mechanical Properties
C Si Mn P S Tensile Strength (Mpa) Yield Strength(Mpa)
ASTM AS3 A ≤0.25 - ≤0.95 ≤0.05 ≤0.06 ≥330 ≥205
B ≤0.30 - ≤1.2 ≤0.05 ≤0.06 ≥415 ≥240
ASTM A106 A ≤0.30 ≥0.10 0.29-1.06 ≤0.035 ≤0.035 ≥415 ≥240
B ≤0.35 ≥0.10 0.29-1.06 ≤0.035 ≤0.035 ≥485 ≥275
ASTM A179 A179 0.06-0.18 - 0.27-0.63 ≤0.035 ≤0.035 ≥325 ≥180
ASTM A192 A192 0.06-0.18 ≤0.25 0.27-0.63 ≤0.035 ≤0.035 ≥325 ≥180
API  5L PSL1 A 0.22 - 0.9 0.03 0.03 ≥331 ≥207
B 0.28 - 1.2 0.03 0.03 ≥414 ≥241
X42 0.28 - 1.3 0.03 0.03 ≥414 ≥290
X46 0.28 - 1.4 0.03 0.03 ≥434 ≥317
X52 0.28 - 1.4 0.03 0.03 ≥455 ≥359
X56 0.28 - 1.4 0.03 0.03 ≥490 ≥386
X60 0.28 - 1.4 0.03 0.03 ≥517 ≥448
X65 0.28 - 1.4 0.03 0.03 ≥531 ≥448
X70 0.28 - 1.4 0.03 0.03 ≥565 ≥483
API  5L PSL2 B 0.24 - 1.2 0.025 0.015 ≥414 ≥241
X42 0.24 - 1.3 0.025 0.015 ≥414 ≥290
X46 0.24 - 1.4 0.025 0.015 ≥434 ≥317
X52 0.24 - 1.4 0.025 0.015 ≥455 ≥359
X56 0.24 - 1.4 0.025 0.015 ≥490 ≥386
X60 0.24 - 1.4 0.025 0.015 ≥517 ≥414
X65 0.24 - 1.4 0.025 0.015 ≥531 ≥448
X70 0.24 - 1.4 0.025 0.015 ≥565 ≥483
X80 0.24 - 1.4 0.025 0.015 ≥621 ≥552


China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube


China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube
China Black Square Steel Pipe Seamless Black Annealed Steel Square Tube Rectangular Low Carbon Hollow Section Tube

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