oil drill pipe

420 304 Ủ nhiệt hợp kim Tấm thép không gỉ

420 304 Annealing and Tempering Stainless Alloy Plate Material 42CrMo4, 18CrNiMo7-6, 40CrNiMo,34CrNiMo6,304,316,321,410,420,1020,1035,1045 Size Range OD:＜3000mm, WT:＜800mm, Length:＜3000mm Delivery conition: Carbon or alloy: Normalizing+Tempering / Stainless: Solid Solution Pickling for tubesheet drilling Raw material Round steel, steel ingot Application Fertilizer, oil refining, power station, agricultural machinery, metallurgy, mining, machinery and equipment,tubesheet in