GI Steel Pipe
group nameGalvanizing
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Min Order1 metric ton
brand nameTYT STEEL
payment methodT/T, L/C, D/P D/A, MoneyGram, Credit Card, PayPal, Escrow
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update timeFri, 15 May 2015 11:36:56 GMT
Paramtents
Standard BS, JIS, GB, ASTM, API, BS 1387, BS EN10025, BS EN 10297, BS 4568, BS EN 39, BS 31, BS EN10219, BS EN10217, JIS G3446-2004, JIS G3466, GB 3087-1999, ASTM A106-2006, ASTM A53-2007, API 5CT, API 5L
Grade 10#-45#, 16Mn, A53-A369, API J55-API P110, ST35-ST52, Q195-Q345, 10#, 20#, 45#, 16Mn, A53(A,B), A106(B,C), API J55, API K55, St37, St37-2, ST35, Q235, Q345, Q195, Q215
Thickness 0.5 - 20 mm
Section Shape Rectangular
Outer Diameter 20*20-600*600mm
Secondary Or Not Non-secondary
Application Structure Pipe
Technique ERW
Certification ISO, BV
Surface Treatment Galvanized
Special Pipe Thick Wall Pipe
Alloy Or Not Non-alloy
Brand name TYT
Packging & Delivery
Min Order1 metric ton
Briefing
OD:20*20-600*600mm
WT: 0.5 - 25 mm
Coat: 60-550gm2
Assessed product by Alibaba&BV
Detailed
1.GI Steel Pipe
2. Technical requirements:
1). Chemical Composition:
Yield Strength Grade | Demotic Raw-material Grade |
235 | Q235B, Q235C, Q235D, Q235qC, Q235qD |
345 | Q345A, Q345B,Q345C,Q345D,Q345Qc, Q345Qd, StE355, B480GNQR |
Carbon Equivalent
Ceq(%)=C+Mn/6+Si/24 +Ni/40+Cr/5+Mo/4+V/14
Ⅰgrade product Ceq(%)
Yield Strength Grade | 235 | 345 | 390 |
Ceq(%) | ≤0.36 | ≤0.43 | ≤0.45 |
Note: In order to improve the performance of steel,390 could add the microelement such as V, Nb, Ti, Mo and N etc. | |||
2). Mechanical Property:
Yield Strength Grade | W.T (mm) | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) | (20°C) Impact Value J |
235 | 4~12>12~22 | ≥235 | ≥375 | ≥23 | ≥27 |
345 | 4~12>12~22 | ≥345 | ≥470 | ≥21 | ≥27 |
390 | 4~12>12~22 | ≥390 | ≥490 | ≥19 | ≥27 |
3). ⅠGrade Product Yield Strength:
Yield Strength Grade | Outside perimeter (mm) | Wall Thickness (mm) | Yield Strength % | |
Directly to Square | Round to Square | |||
235 | ≥800 | 12~22 | ≤80 | ≤90 |
345 | ||||
390 | ≤85 | ≤90 | ||
Note: when the outer perimeter less than 800mm,can be determined by supply and buyer | ||||
3. Manufacturing Process:
1).Directly into Square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a rectangular steel tube forming method. Also known as square-square method.
2). Round to square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a round steel tube forming method, though the reshaping finally form a rectangular steel tube forming method. Also known as round to square method.
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