Premium ASTM A333 Gr.6 Seamless Steel Pipes by Haihao Group

Haihao Group proudly offers high-quality ASTM A333 Gr.6 seamless steel pipes, adhering to the stringent standards set by the American Society for Testing and Materials (ASTM). These pipes are specially designed for low-temperature applications and other uses requiring notch toughness.

ASTM A333 Gr.6 Seamless Steel Pipes

Material Standards

ASTM A333 Gr.6 seamless steel pipes meet the rigorous specifications for chemical composition and mechanical properties, ensuring superior performance and reliability in demanding environments.

Chemical Composition

The precise control of chemical composition is crucial for maintaining the quality of the pipes. The following table details the chemical requirements for ASTM A333 Gr.6:

Carbon (C): ≤ 0.30%

Silicon (Si): ≥ 0.10%

Manganese (Mn): 0.29 – 1.06% (increased by 0.05% for every 0.01% decrease in carbon below 0.30%, up to 1.35%)

Phosphorus (P): ≤ 0.025%

Sulfur (S): ≤ 0.025%

Chromium (Cr): ≤ 0.30%

Nickel (Ni): ≤ 0.40%

Molybdenum (Mo): ≤ 0.12%

Copper (Cu): ≤ 0.40%

Vanadium (V): ≤ 0.08%

Niobium (Nb): ≤ 0.02%

These stringent requirements ensure the pipes have excellent strength and toughness.

Mechanical Properties

ASTM A333 Gr.6 standard specifies detailed mechanical properties to ensure robust performance:

Tensile Strength: Minimum 415 MPa

Yield Strength: Minimum 240 MPa

Elongation: Minimum 30%

Impact Test Temperature: -45°C

These properties guarantee the pipes’ functionality in low-temperature environments, providing sufficient strength and ductility.

Product Specifications

Outer Diameter: 21.3 mm to 762 mm

Wall Thickness: 2.0 mm to 140 mm

Production Methods: Hot-rolled, Cold-drawn, Hot-expanded

Delivery Condition: Heat-treated (Normalized)

Heat Treatment Process

The final product undergoes a normalization heat treatment process to enhance its mechanical properties:

Normalization Temperature: 900°C – 930°C

Holding Time: 10 – 20 minutes

Cooling Method: Air cooling

Surface Condition

To ensure accurate test results, all pipe surfaces must be free from scale, contamination, grease, paint, or any other foreign substances. The cleaning methods used must not damage the base material or alter the surface roughness. Overly rough surfaces or deep scratches can interfere with non-destructive testing signals.

Haihao Group’s Commitment to Quality

Haihao Group is dedicated to producing seamless steel pipes that meet the highest standards of quality and performance. Our ASTM A333 Gr.6 seamless steel pipes are meticulously manufactured and tested to ensure they meet all client specifications and industry standards.

For more information on our products and services, or to place an order, please contact our sales team or visit our website. At Haihao Group, we are committed to delivering excellence and ensuring customer satisfaction with every order.