Carbon Steel Square Tube
Carbon Steel Square Tube is a strong, versatile structural material used widely in construction, automotive, and machinery industries.
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WhatsApp : +8615964517057
Email : bob@shaangangsteel.com
Product Details

Carbon Steel: Properties, Production, Examples and Applications


Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.


Types of carbon steel and their properties


Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel [1]. Their carbon content, microstructure and properties compare as follows:



Carbon content (wt.%)MicrostructurePropertiesExamples
Low-carbon steel< 0.25Ferrite, pearliteLow hardness and cost. High ductility, toughness, machinability and weldability
Medium-carbon steel0.25 – 0.60MartensiteLow hardenability, medium strength, ductility and toughness
High-carbon steel0.60 – 1.25PearliteHigh hardness, strength, low ductility


Carbon Steel Description



Grade:


1)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


2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q 


3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80 


4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE



PRODUCT DETAILS



Place of Origin:China
Oiled or Non-oiled:Non-oiled
Alloy Or Not:Non-Alloy
Tolerance:±1%
Special Pipe:Thick Wall Pipe,EMT Pipe
Out Diameter:10-1500mm
wall thickness0.4-25mm
Length:1-12m
Shape:Round, Square or Rectangular
Itmes:4 6 12 inch SCH 40 80 black carbon steel pipe
processing serviceBending, Welding, Decoiling, Punching, Cutting
Secondary Or Not:Non-secondary
technologyhot rolled, cold rolled, black annealed
Keyword:welded steel pipe
End protector:Plastic Pipe Cap
Thickness:0.35 - 100mm
Standard:API, ASTM, bs, GB, API 5L, ASTM A106-2006,ASTM A53-2007, BS 1387, BS 1139, BS EN10219, GB 3087-1999, GB/T3901,EN, BS, JIS
Technique:ERW /LSAW/SSAW
Surface Treatment:Paint oil; Varnish; Galvanized;
Galvanize the raw strip steel;
Certificate:Bsi, RoHS, SNI, BIS, SASO, SONCAP, sirm, ISO9001,API,ISO
Grade:10#, 20#, 45#, Q235, Q345, Q195, Q215, ST52,
ST42, ST35, 10#-45#, Q195-Q345, ST35-ST52
Q235, Q235B, S275, S275jr, A53, st37,  st52
Q195 → Grade B, SS330,SPHC, S185
Q215 → Grade C,CS Type B,SS330, SPHC
Q235 → Grade D,SS400,S235JR,S235JO,S235J2
Q345 → SS500,ST52
Usage:mechanical manufacture, construction field,
metallurgy industry, farm vehicles, agriculture greenhouse,
automotive industry, railway, highway guardrail,
 container frame, furniture, decoration, steel structure,
Chemical Fertilizer Pipe,Structure Pipe, Building Construction
packageStandard Seaworthy Packing
tied with steel trips,then wrapped by plastic material
or as request
Payment Term:L/C T/T (30%DEPOSIT)
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FAQ

Q: Are you a factory or a trading company?

A:We are manufacturer and trader. You are welcome to visit our factory.

Q: Can you guarantee the quality of your products?

A: We always insist on the best quality. We conduct 2 quality inspections one by one. Our mission: to be a world-class professional, reliable and excellent steel supplier.

Q: Do you provide samples? ls it free or 2 extra?

A: Samples can be provided to customers for free, but the freight is borne by the customer. The sample freight will be returned to the customer after our cooperation.

Q: What's your minimum order quantity?

A: We welcome you to try the MOQ 25T, loaded into 1*20GP. Largequantity can reduce your cost.

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