... precision soft/ hard-surfaced gear or gear shaft. The main specification is within Φ2000mm, Mn≤40mm. Our company can produce 4000 ... to our custumers’ requirements.The main technical parameters of gear1.Standard of materials: GB/T3077-19992.The grade of materials: 45, 20Cr, 40Cr , ... flaw detection, grade two. If the forging pieces are within 1000 kgs, they can reach the GB/T6402-1999 standard, grade ...