DONGGUAN RUIYUAN STEEL CO., LTD

1). Hot rolled condition, Pre-harden & tempering, black surface 2). Hardness: 28~34HRC 3). Ultrasonic test standard: SPE1921-GR3, CLASS C/C

1). Hot rolled condition, Pre-harden &tempering, black surface 2). Hardness: 28~34HRC 3). Hot rolled technology: EAF+LF+VD 4). Ultrasonic t

1. Hot rolled condition, Pre-harden &tempering, black surface 2. Hardness: 30~36HRC 3. Hot rolled technology: EAF+LF+VD 4. Ultrasonic test st

1. Hot rolled condition, Pre-harden, black surface 2. Hardness: 32~36HRC 3. Hot rolled technology: EAF+LF+VD 4.Ultrasonic test standards: Sep

1. Hardness: 30~36HRC 2. Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface 3 .Ultrasonic test standard: SPE1921-GR3, CLASS C/C or

1.Forging, Pre-Harden & Tempering, black surface 2. Hardness: 30~36HRC 3.Ultrasonic test standard: SPE1921-GR3, CLASS C/C or D/D

Hot rolled condition, annealing or Pre-harden, black surface Hardness: 229HBS or 32~36HRC Hot rolled technology: EAF+LF+VD Ultrasonic test s

1.Hot rolled or condition, Pre-harden &tempering, black surface 2. Hardness: 28~32HRC 3. Hot rolled technology: EAF+LF+VD 4. Ultrasonic test

1. Hot rolled or forged condition, annealing or harden, black or milled surface 2. Hot rolled technology: EAF+LF+VD Forged technology: EAF+LF+VD

Hot rolled or forged condition, annealing, black or milled surface Hardness: 255HBS; 38~45HRC Hot rolled technology: EAF+LF+VD Forged techno