Atlas 8620H Case Hardening Steel Bar 8620H - （阿特拉斯8620 h表面硬化钢杆8620 h -）.pdf

Atlas 8620H Case Hardening Steel Bar 8620H Colour code: Red (Band) - White Introduction Atlas 8620H is a low Nickel Chromium Molybdenum case hardening steel of medium hardenability used principally for relatively lightly stressed components. Atlas 8620H can be carburised and subsequently hardened by a quenching and tempering operation. The “H” designation of 8620H indicates guaranteed hardenability according to the hardenability diagram on the following page. Related Specifications Atlas 8620H complies with AS1444 Grade 8620H and/or ASTM A29 Grade 8620. Alternatively Atlas 8620H can be supplied as Euronorm grade 20NiCrMo2-2+HH (Material Number 1.6523/1.6526 under EN 10084). Chemical Composition Specification values in % Grade C Si Mn P S Cr Ni Mo 0.17- 0.10- 0.60- ≤ 0.35- 0.15- 8620H ≤ 0.040 0.35-0.65 0.23 0.35 0.95 0.040 0.75 0.25 0.17- 0.65- ≤ 0.40- 0.15- 1.6523 ≤ 0.40 ≤ 0.035 0.35-0.70 0.23 0.95 0.035 0.70 0.25 Conditions of Supply Normally supplied in the annealed condition with hardness max 212 HB, with typical hardness being in the range 170-200 HB. Bars are cold finished (peeled) and supplied to k12 tolerance for all bar diameters. All bars are ultrasonically inspected (acco