1.2311钢种.docVIP

1.2311（similar to AISI P20） Conventional melting (EF+LF+VD) GENERAL: Hardened and tempered plastic mould steel Well polishable Nitridable Suitable for chrome plating and pitting Uniform hardness up to a cross-section of approx.400mm. Good toughness Good machinability APPLICATIONS: For: Plastic moulds Tool frames Mould frames for plastic and pressure casting moulds CHEMICAL ANALYSIS:% C Si Mn P S Cr Mo 0.37～0.42 0.20～0.40 1.40～1.60 ≤0.025 ≤0.005 0.20～0.40 0.20～0.40 PHYSICAL PROPERTIES: Coefficient of thermal espansion 20-100oC 20-200oC 20-300oC 20-400oC 20-500oC [10-6m/(m×K)] 11.1 12.9 13.4 13.8 14.2 Thermal conductivity 20 oC 200 oC 300 oC [W/(m×K)] 34.2 33.8 32.0 ULTRASONIC: ASTM A388-FBH max.6mm(1/4 inch) or SEP 1921-test group 3-classC,c or Acc.to your requset CLEANLINESS: ASTM E45-Method A with type A≤1.5,B,C and D each≤2 or DIN 50602-K4≤20 or Acc.to your request DELIVERY CONDITION” Hardened and tempered SERVICE HARDNESS 280-325 HB or acc.to your request STRUCTURE: Fine bainitic structure HEAT TREATMENT: Hot forming Soft annealing Hardening Tempering 1050-850oC 710-740oC 840-880oC 580-680oC# TEMPERING DIAGRAM: # Values in HRC Tested on samples dia.25×50mm long Hadened at 880oC in oil CCT GRAPH: DELIVERY SIZES: Rounds-up to 500mm Blocks-up to 400mm thickness or acc. To your request