High Strength ABS Dh36 Steel Tube for Hull Structure & Shipbuilding DN80 Sch80s BV Eh36 Round Seamless Steel Pipe Factory

Product Description

High Strength ABS DH36 Steel Tube for Hull Structure & Shipbuilding DN80 SCH80S BV EH36 Round Seamless Steel Pipe Factory

Product Description

ABS AH36 steel pipe is a high-strength, low-alloy structural steel pipe certified by the American Bureau of Shipping (ABS), primarily used for shipbuilding and offshore engineering. It is defined by a minimum yield strength of 355 MPa (51 ksi).
1. Chemical Composition (ABS Standard)

Element	Limit (wt%)
C	≤ 0.18%
Mn	0.90 - 1.60%
Si	0.10 - 0.50%
P	≤ 0.035%
S	≤ 0.035%
Ni	≤ 0.40%
Cr	≤ 0.20%
Cu	≤ 0.35%
Nb/V/Ti	Microalloy additions (for grain refinement)

2. Mechanical Properties (Typical)

Property	Value
Yield Strength (ReH)	≥ 355 MPa (51,000 psi)
Tensile Strength (Rm)	490 - 620 MPa (71,000 - 90,000 psi)
Elongation (A)	≥ 21% (in 8" gauge length)
Impact Toughness	≥ 34 J at 0°C (for thickness ≤ 50mm)

3. Key Features
High Strength-to-Weight Ratio: Enables lighter structures while maintaining load capacity.
Good Toughness: Resists brittle fracture, even in cold marine environments.
Weldability: Suitable for common shipyard welding processes.
Corrosion Resistance: Basic resistance to seawater; typically used with protective coatings.
4. Common Applications
Ship hull structures, decks, bulkheads, and piping systems.
Offshore platforms, jack-ups, and subsea pipelines.
Marine machinery and structural components.
5. Manufacturing & Delivery
Processes: Seamless (hot-rolled, cold-drawn) or welded (ERW, SSAW).
Heat Treatment: Usually supplied in Normalized (N) or Thermo-Mechanically Controlled Processed (TMCP) condition.
Sizes: OD from ~12.5 mm to 824 mm; WT from 2 mm to 100 mm.
Certification: Must carry ABS mill test certification (MTC)

Comparison Table of ABS AH36 / DH36 / EH36 Marine Steel Pipe Properties
1. Chemical Composition (Typical Maximum Limits, wt%)

Grade	C	Si	Mn	P	S
AH36	≤0.18	0.10-0.50	0.90-1.60	≤0.035	≤0.035
DH36	≤0.18	0.10-0.50	0.90-1.60	≤0.035	≤0.035
EH36	≤0.18	0.10-0.50	0.90-1.60	≤0.035	≤0.035

The basic chemical composition of the three grades is nearly identical. Differences lie mainly in impact test temperature and toughness requirements, not chemical composition.

2. Mechanical Properties Comparison

Property	AH36	DH36	EH36
Yield strength	≥355 MPa	≥355 MPa	≥355 MPa
Tensile strength	490-620 MPa	490-620 MPa	490-620 MPa
Elongation	≥21%	≥21%	≥21%
Charpy V-notch	≥34 J @ 0°C	≥34 J @ -20°C	≥34 J @ -40°C
Application temperature	General sea areas	Cold sea areas	Arctic / severe cold conditions

3. Corresponding National Standard (GB/T 712-2011)
ABS AH36 ≈ GB AH36
ABS DH36 ≈ GB DH36
ABS EH36 ≈ GB EH36

4. Selection Recommendations
General marine and ship structures: AH36 offers the best cost performance
Cold sea areas, northern shipping routes, ice zones: DH36
Extreme cold, Arctic, and harsh high-latitude environments: EH36

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Company Profile

 

Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.

 

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FAQ

Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.

Q2: Can you provide OEM/ODM service? 
A: Yes. Please feel free to contact us for more details.

Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.

Q4: Can we visit your factory? 
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.

Q5: Can you provide sample? 
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.

Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.