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

 We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as: DAYE Special Steel-a famous steel enterprise with the longest steelmaking history; BAO Steel, and Dongbei Special Steel Group-the biggest special steel manufacturer; TPCO, VALIN-largest seamless steel tube production enterprise; What's more, we have built long, deep and close business relationship with dozens of steel companies, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!