从China供应商批发进口Alloy Steel Astm 4140 Round Bar — FOB条款

This ASTM 4140 round bar is a chromium-molybdenum alloy steel supplied by Hubei Zhongcheng New Material Supply Chain Management Co., Ltd. in China, available in hot forged diameters from 50mm to 500mm and hot rolled diameters from 6mm to 50mm. Lengths range from 2,500mm to 5,000mm, with the material meeting ASTM 4140 standards for industrial applications.

The chemical composition of ASTM 4140 includes 0.38-0.43% carbon, 0.80-1.10% chromium, and 0.15-0.25% molybdenum, which contribute to its high strength and wear resistance. Typical industry uses include automotive axles, oil and gas drill components, and machinery parts, where its balance of strength and ductility is critical. The steel is electric furnace melted, forged, and annealed, with a typical hardness of 217 HB max in the annealed state.

Hubei Zhongcheng’s ASTM 4140 round bars are processed with a diameter tolerance of -0/+5mm and thickness tolerance of -0/+5mm, with widths ranging from 20mm to 810mm for plate forms. The supplier offers seaworthy packaging and delivery from ports like Wuhan, Shanghai, or Tianjin. Buyers should confirm ultrasonic testing (UT) standards, such as SEP 1921/84/2 C/c class, and quantity allowances, which are typically -/+10% per item.

Hubei Zhongcheng New Material Supply Chain Management Co., Ltd. is located at Hangzhou West Road, No. 176, Xialu District, Huangshi, Hubei, China. The company operates as a harbor-tier supplier specializing in alloy steel products, including ASTM 4140 round bars, with a focus on global export markets.

The supplier’s profile indicates a trust tier of harbor, with no recorded response rate or average response time, meaning buyers should initiate contact directly for inquiries. Payment terms offered include 100% irrevocable letter of credit or 30% T/T deposit with 70% before shipment. Delivery is typically 40 days after receipt of payment, with ports of Wuhan, Shanghai, or Tianjin as options.