Place of Origin: Shandong, China (Mainland) Brand Name: Huamin Model Number: 120mm Specifications: 1) Size: Dia. 40 - 120mm, Length 3000-6000mm 2) Hardness: HRC 45-55 3) Chemical elements(%): C: 0.48-0.85, Si: 0.15-0.37, Mn: 0.7-1.0, P: 0.035 MAX, S: 0.035 MAX Dimensions: 40mm-120mm Surface Hardness: 50-55HRC Breakage Rate: â?¤1% Core Hardness: 45-50HRC Packaging: Bundle Certification: ISO9001, ISO14001, OHSAS18001 Impact Value: â?¥12 J/ã?¡ Producing Area: Famous Blacksmith Hometown in China Dropping Test: more than 20000 times Raw Material: High-Quality Round Steel from Famous Steel Company Delivery Time: promptly