Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel

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Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
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.

Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
ProductSquare and Rectangular Steel Pipe
MaterialCarbon Steel
GradeGB: 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
StandardASTM, DIN, ISO, EN, JIS, GB, etc.
SurfaceGalvanized, 3PE, painting, coating oil, steel stamp, drilling, etc.
EndsPlain ends
SpecificationOD: 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 endsPlain, Beveled, Threaded, Socket with holes, With PVC clap/ coupling/ clamp
ApplicationWidely 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%
MOQ1 ton
Supply Ability5000 tons / month
Lead Time7-15 working days after the receipt of 30% deposit
Payment Terms30%T/T Advance + 70% Balance
Price TermsFOB, CFR, CIF, EXW
PackingStandard sea-worthy package or as required


Mechanical character & Chemical element of normal material:
MaterialQ195CMnSiSP 
Chemical0.06-0.120.25-0.50≤0.30≤0.050≤0.045 
CompositionTensile strength: 315-430(Mpa)
(%)Yield strength:195(Mpa)
 Elongation:33
 Q235CMnSiSP 
 0.12-2.00.3-0.70≤0.30≤0.045≤0.045 
 Tensile strength: 375-460(Mpa)
 Yield strength:235(Mpa)
 Elongation:26
 Q345CMnSiSPV
 ≤0.20≤1.70≤0.55≤0.040≤0.0400.02-0.15
 Tensile strength: 470-630(Mpa)
 Yield strength:345(Mpa)
 Elongation:21

Rectangular Hollow SectionSquare Hollow Section
SizeThicknessSizeThicknessSizeThickness
mmmmmmmmmmmm
50 X 252120 X 40320 x 202
50 X 252.5120 X 403.620 x 202.5
50 X 253120 X 40425 x 252
50 X 302.5120 X 40525 x 252.5
50 X 303120 X 40625 x 253
50 X 303.2120 X 406.330 x 302.5
50 X 304120 X 60330 x 303
60 X 402.5120 X 603.640 x 402
60 X 403120 X 60440 x 402.5
60 X 403.2120 X 60540 x 403
60 X 404120 X 60640 x 404
80 X 403120 X 606.350 x 502
80 X 403.2120 X 80350 x 502.5
80 X 404120 X 80450 x 503
80 X 602.5120 X 80550 x 504
80 X 603120 X 80650 x 505
80 X 603.6120 X 806.360 x 603
80 X 604150 X100360 x 604
80 X 605150 X100460 x 605
90 X 502.5150 X100570 x 703
90 X 503150 X100670 x 703.6
90 X 503.6150 X1006.370 x 705
90 X 504160 X 80380 x 803
90 X 505160 X 80480 x 803.6
100 X 403160 X 80580 x 805
100 X 403.6160 X 80680 x 806
100 X 404160 X 806.390 x 903
100 X 405200 X 100490 x 903.6
100 X 503200 X 100590 x 905
100 X 503.6200 X 100690 x 906
100 X 504200 X 1006.3100 x 1004
100 X 505200 X 1008100 x 1005
100 X 506200 X 10010100 x 1006
100 X 506.3200 X 10012.5100 x 1008
100 X 603200 X 10016100 x 10010
100 X 603.6250 X 1506.3120 x 1205
100 X 604250 X 1508120 x 1206
100 X 605250 X 15010120 x 1208
100 X 606250 X 15012.5120 x 12010
100 X 606.3250 X 15016150 x 1505
100 X 803300 X 2006.3150 x 1506
100 X 803.6300 X 2008150 x 1508
100 X 804300 X 20010150 x 15010
100 X 805300 X 20012.5180 x 1806
100 X 806300 X 20016180 x 1808
100 X 806.3400 X 20010180 x 18010
  400 X 20012.5180 x 18012.5
  400 X 20016200 x 2006
  450 X 25010200 x 2008
  450 X 25012.5200 x 20010
  450 X 25016200 x 20012.5
    250 x 2508
    250 x 25010
    250 x 25012.5
    300 x 3008
    300 x 30010
    300 x 30012.5


Chemical & Mechanical Properties of Carbon Steel Square Pipes
StandardGradeChemical Components (%)Mechanical Properties
CSiMnPSTensile Strength (Mpa)Yield Strength(Mpa)
ASTM AS3A≤0.25-≤0.95≤0.05≤0.06≥330≥205
B≤0.30-≤1.2≤0.05≤0.06≥415≥240
ASTM A106A≤0.30≥0.100.29-1.06≤0.035≤0.035≥415≥240
B≤0.35≥0.100.29-1.06≤0.035≤0.035≥485≥275
ASTM A179A1790.06-0.18-0.27-0.63≤0.035≤0.035≥325≥180
ASTM A192A1920.06-0.18≤0.250.27-0.63≤0.035≤0.035≥325≥180
API  5L PSL1A0.22-0.90.030.03≥331≥207
B0.28-1.20.030.03≥414≥241
X420.28-1.30.030.03≥414≥290
X460.28-1.40.030.03≥434≥317
X520.28-1.40.030.03≥455≥359
X560.28-1.40.030.03≥490≥386
X600.28-1.40.030.03≥517≥448
X650.28-1.40.030.03≥531≥448
X700.28-1.40.030.03≥565≥483
API  5L PSL2B0.24-1.20.0250.015≥414≥241
X420.24-1.30.0250.015≥414≥290
X460.24-1.40.0250.015≥434≥317
X520.24-1.40.0250.015≥455≥359
X560.24-1.40.0250.015≥490≥386
X600.24-1.40.0250.015≥517≥414
X650.24-1.40.0250.015≥531≥448
X700.24-1.40.0250.015≥565≥483
X800.24-1.40.0250.015≥621≥552


Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube SteelQ255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel
Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel


Q255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube SteelQ255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube SteelQ255A 255b Carbon Steel Square Tube ASTM A106 Structural Tubing Square Tube Steel

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