Import A333 — Buy in wholesale FOB from Supplier in China

ASTM A333 Grade 6 is a seamless and welded low-temperature carbon and alloy steel pipe specified for service environments down to -45 degrees Celsius. Henan Anson Steel Co., Ltd. supplies this material in accordance with ASTM/ASME specifications, with the Grade 6 designation indicating a composition of carbon, manganese, and trace alloying elements controlled to maintain notch toughness at cryogenic temperatures. The pipe is available in nominal pipe sizes (NPS) from 1/8 inch to 42 inches, with wall thicknesses specified by Schedule numbers (Sch 40 through Sch 160, and XXS) and dimensional tolerances per ASTM A530. The source description confirms both seamless and welded forms are offered, with welded pipe employing longitudinal or spiral seam processes subject to radiographic or ultrasonic inspection.

The material composition of A333 Grade 6 typically includes 0.30% carbon maximum, 0.60-1.06% manganese, 0.10% silicon maximum, and deliberate restrictions on sulfur (0.025% maximum) and phosphorus (0.025% maximum) to preserve weldability and toughness. Nickel, chromium, and molybdenum may be present in small quantities as residual or intentional alloying elements. The pipe is normalised after forming, with a normalising temperature typically 900-930 degrees Celsius, followed by air cooling to achieve a ferritic-pearlitic microstructure with dispersed fine carbides. Charpy V-notch impact testing at -45 degrees Celsius is mandatory, with a minimum absorbed energy of 18 J (longitudinal) or 14 J (transverse) for standard wall thicknesses. For sour service or H2S-containing environments, buyers should request supplemental testing per NACE MR0175/ISO 15156, as standard A333 Grade 6 does not claim sour service resistance.

Primary applications include LNG terminal piping, offshore platform process lines, ethylene and propylene cryogenic storage, and petrochemical plants in Arctic or high-altitude locations. The pipe is specified when designers require guaranteed toughness at temperatures where standard carbon steels (A106 Grade B, A53) would exhibit brittle fracture behaviour. Henan Anson Steel Co., Ltd. is located in Anyang, Henan Province, with proximity to Tianjin Port for northern China export routing. Buyers should confirm with the supplier whether pipes are supplied with original mill test certificates, whether third-party inspection (SGS, BV, TUV, or equivalent) is available, and what minimum order quantities apply for mixed-size shipments. The custom specification note on the listing references -45 degrees Celsius service, which aligns with standard A333 Grade 6 requirements, though buyers should verify actual test temperatures and absorbed energy values on the certificate.

Henan Anson Steel Co., Ltd. is headquartered at Room 305, Kechuang Mansion, Anyang, Henan Province, China (postal code 455000). The company holds a harbour trust tier on its marketplace platform, with a 0.00% response rate and zero recorded average response hours, indicating no verified platform-mediated communication history. The supplier address places it in Anyang, a city with established steel production and trading infrastructure, though this does not confirm manufacturing ownership. Buyers should verify through direct contact whether Henan Anson Steel Co., Ltd. operates its own mill, sources from designated mills under off-take agreements, or functions as a trading company.

The supplier profile does not disclose factory certifications (ISO 9001, ISO 14001, API Q1), production capacity, annual tonnage, workforce size, or named clientele. No specific API monogram licence or ASME U-stamp authorisation is mentioned. The source description references ASTM/ASME compliance and provides a product-specific URL, though web content should not substitute for certified documentation. Buyers should request a current company profile, factory audit report, and at least three reference customers in the LNG or petrochemical sector before committing to volume orders. The lack of response history necessitates direct verification of the supplier's commercial reliability and technical competence in low-temperature steel specifications.