... S41000 2Cr13420420S37SUS420J1X20Cr13 S42000 3Cr13 420S45SUS420J2 7Cr17440A SUS440A S44002 0Cr17Ni7Al631 SUS631X7CrNiAl177QiLu Special Steel Co,.Ltd is a leading company in China which ... , such as Alloy Structural Steel, Alloy Tool Steel, Carbon Structural Steel, Carbon Tool Steel, Bearing Steel, Spring Steel ,Stainless Steel, Refractory Steel, Roll Steel, Pinion Steel. Additionally, the company also ...