... API, ASME, BS, JIS, DIN,GOST,etc. standards. 1. Capacity: Material we do: carbon steel, alloy steel and ... LF-VD/ESR. Material Certificate according to EN10204-3.1 is requested from ingot supplier 4. Specifications of Forging ... ≤3.5 / Ring ≤4.9 ≤4.0 Cylinder ≤1.5 ≤4.0 5. Certification: ISO9001: 2000, ABS,BV ... : 7. Products: 8.Packing: 9. Certification: AISI 4130/4140/4340/8630/8620/f51/f22/p91/2205/304/316 ...