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Product Description

Place of Origin:China
Oiled or Non-oiled:Non-oiled
Alloy Or Not:Non-Alloy
Tolerance:±1%
Special Pipe:Thick Wall Pipe,EMT Pipe
Outer Diameter:13 - 600 mm
outer meter10*10-600*600mm
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)

1. Chemical Composition

Carbon steel pipes primarily consist of iron (Fe) and carbon (C), with low levels of other elements. Typical compositions (using ASTM standards as an example) are as follows:




Element Typical Range (Weight Percentage) Remarks




Carbon (C) 0.06%–0.35% Low-carbon steels (e.g., ASTM A53) typically ≤0.30%; high-carbon steels offer higher strength but poorer weldability.

Manganese (Mn) 0.29%–1.06% Enhances strength and hardenability; ASTM A106 Grade B allows 0.29–1.06%.

Silicon (Si) 0.10%–0.35% Improves deoxidation and increases strength.

Sulfur (S) ≤0.035% Impurity; excessive amounts cause hot brittleness.

Phosphorus (P) ≤0.035%–0.05% Impurity; excessive amounts reduce toughness.

Others Traces (e.g., Cu≤0.40%, Ni≤0.40%, etc.) Varies by standard requirements.

Example Grades:

ASTM A53 Grade B: C≤0.30%, Mn≤1.2%, S≤0.045%, P≤0.05%.

GB/T 8163 20# Steel: C 0.17%–0.24%, Mn 0.35%–0.65%, Si 0.17%–0.37%.

2. Mechanical Properties

Mechanical properties depend on composition, heat treatment (e.g., normalizing, annealing), and processing:




Property Typical Range (ASTM Standards) Example (ASTM A106 Grade B)




Tensile Strength 415–655 MPa ≥415 MPa

Yield Strength 240–450 MPa ≥240 MPa

Elongation ≥20%–30% (50mm gauge length) ≥30% (wall thickness ≤22mm)

Hardness ≤197 HB (Brinell) or ≤90 HRB Controlled via heat treatment.

Comparison with Other Standards:

GB/T 8163 20# Steel: Tensile strength ≥410 MPa, yield strength ≥245 MPa, elongation ≥25%.

API 5L Gr.B: Tensile strength ≥414 MPa, yield strength ≥241 MPa.


Product Show

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Company Profile

BAOSTEEL Co., Ltd is a comprehensive company, who is founded in 2008. Specialized in Carbon steel, alloy steel, galvanized steel in pipe and tube,plate and coil,profiles.

We are located in Tianjin Province, the Steel base of China, It is well-known all over the world. We are close to Tianjin Seaport, that is much convenient in carriage.

We welcome all users, manufacturers and traders to cooperate with us

Since our establishment, we have always adhered to the business policy of "Quality for Survival, Product for Development, Credibility for Cooperation and Service for Customer". Under the guidance of this business policy, our company acts as a perennial distributor of steel pipe, steel plate, steel coil, steel rod, steel profiles of Angang Steel, HBIS, JISCO,SGHB ,and etc.

Modern large-scale outdoor storage and indoor storage have been set up in our company, and 20,000 tons of available goods have been prepared.

Factory Show

Service

Pre-sale Service

1.We provide samples free of charge, but the freight should be paid by the buyer.
2. We have full stock,and can deliver within short time.Many styles for your choices. 
3. OEM and ODM order are accepted, Any kind of logo printing or design are available.
4. Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you.
5. All of our products are produce by our professional workman and we have our high-work-effect
foreign trade team, you can totally believe our service. 

After you choose

1. We will count cheapest shipping cost and make invoice to you at once.
2. Check quality again, then send out to you at 1-2 working day after your payment,
3. Email you the tracking no, and help to chase the parcels until it arrive you.

After-sale choose

1. We are very glad that customer give us some suggestion for price and products.
2. If any question,please contact with us freely by E-mail or Telephone.

FAQ

Q1:Can you send samples?
A:Of course, we can provide customers with free samples and express shipping service to all over of the world.

Q2:What product information do I need to provide?
A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase. 

Q3:It's my first time to import steel products, can you help me with it?
A:Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:What ports of shipment are there?
A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs. 

Q5:What about product prices information?
A:Prices various according to periodic price changes of raw materials. 

Q6:What is your terms of payment ?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.

Q7.Do you provide custom made Products service?
A: Yes,if you have your own design , we can produce according to your specification and drawing.

Q8:What are the certifications for your products?
A:We have ISO 9001, MTC, third parties’ inspections are all available such SGS, BV ect.

Online Consultation

Reliable detection!

We accept formal third-party testing institutions for testing, we can also send samples to you free of charge, customer satisfaction shopping experience is always our pursuit

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