ST52 Grade Seamless Pipe

Parameter

Range

Product

‌ST52 Grade Seamless Pipe‌

Outer Diameter (OD)

‌10-660 mm‌ (up to over 630mm for hot-rolled)

Wall Thickness (WT)

‌1.6-75 mm‌, depending on application

Length

‌6-12 meters‌ (fixed or random)

Applicable Standards

DIN 1629, DIN 2391, EN 10297-1, GB/T 8162

Production Process

Hot rolling, cold drawing, cold rolling

Element

Content (%)

Carbon (C)

≤ 0.22

Silicon (Si)

≤ 0.55

Manganese (Mn)

1.40-1.60

Phosphorus (P)

≤ 0.035

Sulfur (S)

≤ 0.035

Property

Value

Yield Strength (≤16mm thickness)

≥ ‌355 MPa‌

Tensile Strength

‌490-630 MPa‌

Elongation

≥ 18%

Impact Energy (0°C)

≥ ‌23 J

Advantage

Explanation

‌High Strength‌

Offers a minimum yield strength of ‌355 MPa‌ and tensile strength up to ‌630 MPa‌, making it suitable for heavy-load applications like construction, machinery, and pressure systems.

‌Good Weldability‌

With controlled carbon content (≤0.22%) and low sulfur/phosphorus levels, it ensures ‌stable welding performance‌ without cracking, ideal for fabrication and on-site assembly.

‌Seamless Structure‌

No welded joints mean ‌higher pressure resistance‌, reduced risk of leakage, and uniform mechanical properties-critical for hydraulic, pneumatic, and boiler systems.

‌Durability & Toughness‌

High manganese content enhances toughness, while impact resistance (≥23 J at 0°C) ensures reliable performance in cold or dynamic conditions.

‌Broad Compatibility‌

Complies with international standards such as ‌DIN 17100‌, ‌EN 10025‌, and ‌GB/T 8162‌, enabling global sourcing and engineering acceptance.

‌Versatile Applications‌

Used across industries including ‌construction, automotive, energy, and mechanical engineering‌, from structural frames to high-pressure fluid transport.