D3

D3 steel round bars 1.Diameter:10mm~600mm 2.Delivery Conditon:annealed, black/turned surface 3.Short Delivery Time

D3 alloy steel round bars
Chemical Composition(%)
C	Si	Mn	P	S	Cr	----	------
2.00-2.35	0.10-0.60	0.20-0.60	≤0.030	≤0.030	11.0-13.5	---	------
Specialty
High charcoal and chromium tool steel, have high penetration, small distortion, high rigidity, good endurance.
Use
1.Cold pressing mold extrusion with low pressing and burden, imprint mold, cold cutting scissor
Heat Treatment
1.Quench: 950-980`C cold oil(need re-preheat~500`C-850`C)HRC≥60
2.Eliminate stress, stabilize framework tempering, (180-200`C)≥2 hours HRC60-62
3.If it is necessary, it could be changed into 320-350`C≥2 hours backfire HRC≥60-62
4.Annealing: 780-800`C slow cooling
Melting Process
1. EAF: Electric Furnace+LF+VD(Optional)
2. ESR:  Electric Furnace+LF+VD+Eleroslag Remelted(Optional)
UT Class
According to Standard of SEP 1921/84,100% Volume, Level C/c, D/d or E/e
Tolerance on Quantity
+/-10% Per Size