CARRS DF1

55NiCrMoV7 ~1.2714

TYPICAL ANALYSIS

C	0.55	Si	0.30
Mn	0.80	Cr	1.10
Mo	0.50	Ni	1.70
V	0.10

CHARACTERISTICS
This Nickel alloy die steel sets a new standard for material quality. It is the standard high performance die steel with good toughness, deep hardening properties and excellent compressive strength.

TYPICAL APPLICATIONS

•	Dies for press and hammer forging of steel.	•	Hot stamping dies for Aluminium alloys.
•	Tools for extrusion presses such as mandrel holders, backers.	•	Piercing tools for steel tube production

HEAT TREATMENT

HARDNESS
Carrs DF1 is normally delivered ready for use in the pre-hardedned condition (typically 370 HB) but can be supplier in the annealed condition when necessary.

ANNEALING
Raise temperature to 740-760°C, hold for 6-8 hours, then cool slowly in the furnace. Annealed hardness approx 250HB.

STRESS RELIEVING
Raise temperature to 630°C, hold for 1-2 hours and allow to cool slowly.

HARDENING
For forced ain quench, harden at 880-900°C. For oil quench or vacuum furnace, 850-900°C. Interrupt oil quench at 150°C.

TEMPERING

	400°C	500°C	600°C	700°C
Air	47HRC	43HRC	37HRC	31HRC
Oil	50HRC	47HRC	39HRC	32HRC

ALWAYS PREHEAT BEFORE USE

For optimum performance, it is vitally important that tools be preheated to between 250 and 350°C and equalised before use.