16-550 Mm Diameter Tool Steel Bar 718 / P20 Plastic Tool Steel Material

718/P20 Mould Steel Alloy Steel Die Steel Special Steel, tool steel bar, DIA16-550mm, Small MOQ

APPLICATIONS: Inserts, cores, and cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, and plastic mold cavities and components that require high toughness and excellent polishability.

Chemical Composition(%):
C: 0.32-0.45
Si: 0.80-1.20
Mn: 0.20-0.50
P: max. 0.025
S: max. 0.025
Cr: 4.75-5.50
Mo: 1.10-1.75
V: 0.80-1.20
Cu: max. 0.030

Common Size: Round bars: Dia. 80-600mm Plates: Thickness: 40-350mm Width: 100-1000mm, Length: 2m-6m.

Delivery condition: EAF+LF+VD+(ESR), forged, anealed, UT tested, peeled or machined.

Hardness HBW: < =235HB

Tolerance: 0/+2mm

Forging Ratio: Min 1: 4

Surface: Rounds: Black / grinded / turned Plates: Black / milled

Surface condition: Cracks, decarburisation, burd spots and similar surface defects just within permissible tolerances.

Grain size: ASTM E112 5-8

Inclusion rating:
According to ASTM E45

Heat Treatment: 
Forge: At 1050° C-1095° C Cool slowly and anneal then. 
Annealing: At 843° C-898° C; Cool slowly in furnace 
Stress Relieving: Heat slowly to 566° C-676° C, and then cool in still air. 
Hardening: Preheat to 815° C and then heat to 1010° C and hold for 15 to 40 minutes. Air cool (air quench) 

TYPE A B C D
THIN 0.5-2.0 0.5-2.0 0.5-2.0 0.5-2.0
THICK 0.5-2.0 0.5-2.0 0.5-2.0 0.5-2.0
Or K4 max. 30 according to DIN 50602

UT Grade: Sep 1921-84 Group 3 Class D/d Qualified.

Delivery time: According to your needs to discuss

Quality assurance: ISO9001: 2008, IQNet, CQC