Import Alloy Steel Seamless Pipes — Buy in Bulk from Supplier in China

N-Steel (Shanghai) Co., Ltd. supplies alloy steel seamless pipes from its Pudong office for high-pressure service in petrochemical, power generation and infrastructure projects. The pipes are produced by seamless hot-rolling or piercing processes that maintain uniform wall thickness and eliminate weld-related weak points. The source description highlights high tensile strength and compliance with international standards, though specific ASTM or EN grade designations are not itemised in the extracted data and should be requested directly from the supplier.

Alloy steel seamless pipes in this category typically use chromium-molybdenum grades such as 15CrMo (equivalent to ASTM A335 P11) or 12Cr1MoV for Chinese domestic boilers, with carbon contents from 0.08-0.15 percent and chromium from 脚跟1.00-2.50 percent depending on grade. Wall thickness variation is typically plus/minus 12.5 percent for hot-finished seamless pipe under ASTM A530; tighter tolerances of plus/minus 10 percent or better can be negotiated for machined or cold-drawn supply. Surface condition is normally black (mill scale), with pickled or shot-blasted finish available on request.

The pipes serve fluid and gas transmission under pressure, heat-exchanger tubing, steam lines and structural applications where fatigue resistance matters. Buyers are typically international contractors, state-owned energy companies and equipment manufacturers seeking mill-direct or trader-stocked material. The source mentions flexible minimum order quantities and shipping options including CIF and FOB, with payment by letter of credit or telegraphic transfer, but exact figures require direct confirmation with N-Steel (Shanghai) Co., Ltd.

N-Steel (Shanghai) Co., Ltd. is registered at Room 1104, Dragon Pearl Complex, 2123 Pudong Avenue, Shanghai 200135, China, operating from a commercial office location in the Pudong business district. The supplier tier is imported and the trust tier is harbor, with a response rate of 0.00 and no recorded average response hours. The listing does not disclose year of establishment, registered capital, factory ownership, warehouse capacity, or employee count, and none should be inferred.

The company positions itself as a supplier of alloy steel seamless pipes with emphasis on high tensile strength, seamless construction reliability and international standard compliance. ISO and ASTM certifications are mentioned in the source description but not detailed with certificate numbers, scopes or issuing bodies. Buyers should verify whether N-Steel holds mill manufacturing credentials or operates as a trading company, and whether they can provide mill test certificates, original mill quality plans, or only commercial invoices with third-party re-test reports.