DIN 1629 Carbon Seamless Steel Pipes

High-quality Seamless Tubes In Grades St37, St44, And St52 For General Engineering And Pressure Applications.

Din 1629 seamless carbon steel pipes (st37, st44, st52) offer high strength, precision tolerances, and reliable mechanical properties for industrial and structural applications.

DIN 1629 Pipe St37 Seamless Tube St44 Seamless Pipe St52 Carbon Steel +1 More

DIN 1629 Carbon Seamless Steel Pipes

High-quality Seamless Tubes In Grades St37, St44, And St52 For General Engineering And Pressure Applications.

Din 1629 seamless carbon steel pipes (st37, st44, st52) offer high strength, precision tolerances, and reliable mechanical properties for industrial and structural applications.

DIN 1629 Pipe St37 Seamless Tube St44 Seamless Pipe St52 Carbon Steel +1 More

DIN 1629 Steel Pipes are seamless circular tubes made of non-alloy steels with special quality requirements, designed for high-pressure piping and structural applications in industries such as chemical plants, pressure vessels, pipework construction, and mechanical engineering. Conforming to the DIN 1629 standard, these pipes are available in grades St37.0, St44.0, and St52.0, offering excellent corrosion resistance and high impact strength for operating temperatures up to 300°C with no specific pressure limits.

Manufactured through seamless hot-rolled or cold-drawn processes, DIN 1629 Steel Pipes undergo heat treatments such as normalizing, annealing, or stress relieving to optimize mechanical properties and weldability. Available in outer diameters from 10 mm to 324 mm, wall thicknesses from 1 mm to 30 mm, and lengths up to 14,000 mm, they meet diverse project requirements. Rigorous testing, including hydrostatic (up to 50 bar standard, 200 bar max), ultrasonic, or eddy current tests, ensures compliance with DIN 1629 standards. The low carbon content (up to 0.22% for St52.0) and controlled phosphorus and sulfur levels enhance abrasion resistance and weldability, making them ideal for seamless carbon steel tubes.

These seamless carbon steel tubes support multiple welding methods, including gas fusion, arc, flash butt, electric pressure, and gas pressure welding, ensuring versatility in pipeline systems. Surface treatments like galvanization, oil-dip, or anti-corrosion coatings, and end configurations like plain, beveled (30°–35° for welding), or threaded, facilitate easy installation. Packaged in bundles, crates, or wooden boxes, they ensure secure, sea-worthy delivery. DIN 1629 pipes address challenges like high-pressure stress, corrosion, and structural demands, making them a reliable choice for engineers seeking durable structural steel pipes for critical applications.

With grades tailored for varying strength and toughness needs, DIN 1629 Steel Pipes deliver exceptional performance, safety, and longevity in applications like oil and gas pipelines, chemical plants, and mechanical engineering. Their seamless design and robust composition ensure reliability in demanding environments.

Technical Specifications

Chemical Composition of DIN 1629 Carbon Seamless Steel Pipes
Element	St37.0 (%)	St44.0 (%)	St52.0 (%)
Carbon (C)	≤0.17	≤0.21	≤0.22
Manganese (Mn)	≤1.40	≤1.50	≤1.60
Phosphorus (P)	≤0.040	≤0.040	≤0.040
Sulfur (S)	≤0.040	≤0.040	≤0.035
Silicon (Si)	-	-	≤0.55

Mechanical Properties of DIN 1629 Carbon Seamless Steel Pipes
Property	St37.0	St44.0	St52.0
Tensile Strength, min (MPa)	350-480	420-550	500-650
Yield Strength, min (MPa)	235	275	355
Elongation, min (%)	25	23	22
Hardness, max (HRB)	90	92	95

Comparison of DIN 1629 Steel Pipes with Other Standards
Feature	DIN 1629 St37.0	EN 10216-1 P235TR1	ASTM A53 Gr.B
Material Type	Non-Alloy Steel	Non-Alloy Steel	Carbon Steel
Temperature Range	Up to 300°C	Up to 300°C	Up to 400°C
Corrosion Resistance	Moderate	Moderate	Moderate
Applications	Pipelines, Vessels	Boilers, Pipelines	Pipelines, Structural
Tensile Strength (MPa)	350-480	360-500	415-585
Yield Strength (MPa)	235	235	240
Key Advantage	High impact strength	Pressure equipment	Versatile applications

Mechanical Properties of Steel Grades by Processing Condition
Steel grade	BK		BKW		BKS			GBK		NBK
Steel grade	Yield Strength Rm (N/mm² min)	Elongation (% min)	Yield Strength Rm (N/mm² min)	Elongation (% min)	Yield Strength Rm (N/mm² min)	Tensile Strength ReH (N/mm² min)	Elongation (% min)	Yield Strength Rm (N/mm² min)	Elongation (% min)	Yield Strength Rm (N/mm² min)	Tensile Strength ReH (N/mm² min)	Elongation (% min)
St35	480	6	420	10	420	315	14	315	25	340-470	235	25
St45	580	5	520	8	520	375	12	390	21	440-570	255	21
St52	640	4	580	7	580	420	10	490	22	490-630	355	22

You can also search DIN 1629 Steel Pipes as below

A curated list of long-tail keywords for DIN 1629 seamless carbon steel pipes, covering specifications, applications, and material properties, presented in a two-column layout.

Standard

• DIN 1629 seamless carbon steel pipes specifications
• DIN 1629 St37.0 seamless steel pipe standards
• DIN 1629 St44.0 chemical composition
• DIN 1629 St52.0 seamless steel tube properties

Applications

• DIN 1629 seamless pipes for oil and gas
• DIN 1629 St37.0 chemical plant piping
• DIN 1629 seamless tubes for power generation
• DIN 1629 St44.0 pressure vessel pipes
• DIN 1629 seamless pipes for construction

Material and Grades

• DIN 1629 St37.0 pipeline system tubes
• DIN 1629 St44.0 seamless steel pipe material
• DIN 1629 St52.0 high-pressure piping
• Seamless non-alloy steel tubes DIN 1629

Manufacturing and Testing

• DIN 1629 seamless steel tubes manufacturing process
• DIN 1629 seamless steel pipes hydrostatic testing
• Weldable DIN 1629 carbon steel pipes
• Abrasion-resistant DIN 1629 steel pipes

Procurement and Suppliers

• DIN 1629 seamless carbon tubes supplier
• DIN 1629 St52.0 steel pipes distributors
• DIN 1629 seamless steel pipes price

Dimensions and Customization

• DIN 1629 seamless steel tubes dimensions
• DIN 1629 non-alloy steel pipes tolerances
• DIN 1629 St52.0 seamless pipes custom lengths

Note: DIN 1629 covers seamless non-alloy steel pipes for high-pressure and structural applications. For detailed specifications, refer to the DIN 1629 standard or contact a certified supplier.

DIN 1629 is a German standard specifying **seamless circular unalloyed (carbon) steel tubes** subject to special quality requirements, used in general engineering, vessel, and pipeline applications. It has largely been superseded in Europe by EN 10216‑1.

The standard includes three main grades: **St37.0**, **St44.0**, and **St52.0** (material numbers 1.0254, 1.0255, and 1.0421).

Typical composition limits:

St37.0: C ≤ 0.17%, P ≤ 0.040%, S ≤ 0.040%, N ~0.009%
St44.0: C ≤ 0.21%, P ≤ 0.040%, S ≤ 0.040%, N ~0.009%
St52.0: C ≤ 0.22%, Si ≤ 0.55%, Mn ≤1.6%, P ≤0.040%, S ≤0.035%

Typical mechanical properties by grade:

St37.0: Tensile 350–480 MPa; Yield ≥ 235 MPa; Elongation ≥ 25%
St44.0: Tensile 420–550 MPa; Yield ≥ 255 MPa; Elongation ≥ 21%
St52.0: Tensile 500–650 MPa; Yield ≥ 270 MPa; Elongation ≥ 21%

Outer diameter typically ranges from **10 mm to 324 mm**, wall thickness from **1 mm to 30 mm**, with lengths up to **14 000 mm**, maximum up to **18 000 mm**. Tolerances: diameter ±1 % (~±0.08–0.10 mm), wall thickness ±10–17%.

Tubes are made via **seamless process**, either **hot-rolled** or **cold-drawn**. Hot-rolled pipes may be normalized if needed; cold‑drawn/rolled tubes typically receive **normalizing** before delivery.

Typical testing includes **tensile**, **flattening**, **flaring**, **hardness**, **surface inspection**, dimensional checks and **non‑destructive testing** per general requirements (e.g. EN/A450‑type).

Maximum allowable service temperature is **≈ 300 °C**; pressure depends on wall thickness and diameter. No fixed pressure limit is specified in the standard.

These tubes are widely used in **chemical plants**, **pressure vessels**, **pipework**, and general mechanical engineering—not specified for pressure vessel code without additional approval.

Orders should include specification (DIN 1629), grade (St37, St44, or St52), required OD and wall thickness, length (specific or random up to 18 m), surface finish, heat treatment condition, inspection/test requirements, and MTC preferences.

Industrial Applications

DIN 1629 Carbon Seamless Steel Pipes are widely used in industries requiring high-pressure resistance, corrosion resistance, and structural integrity for seamless applications.

Oil and Gas Pipelines

Used for transporting combustible fluids, ensuring high-pressure piping reliability.

Chemical Plants

Employed in pipelines and vessels, offering corrosion resistance for corrosive substances.

Power Generation

Utilized in boilers, providing seamless carbon steel tubes for high-temperature conditions.

Mechanical Engineering

Applied in machinery, benefiting from abrasion resistance and impact strength.

Construction

Used in structural applications, ensuring structural integrity.

Pressure Vessels

Employed in vessel manufacturing, offering seamless carbon steel tubes for high-pressure containment.

DIN 1629 Carbon Seamless Steel Pipes

DIN 1629 Carbon Seamless Steel Pipes

Technical Specifications