30mm / 50mm 1.2436 Hot Rolled Steel Round Bar For Blanking / Punching

Delivery Time:3-5 days
Certification:CE,FCC,MSDS

DIN 1.2436 Steel Bars , Cold Work Tool Steel for Blanking Punching , Shearing

◆ Equivalence

AISI / SAE	DIN / W.Nr	JIS	GB
D6	1.2436	SKD11	Cr12W

◆ Chemical Composition (%)

C	Si	Mn	P	S	Cr	W
2.00 2.30	0.10 0.40	0.30 0.60	≤ 0.030	≤ 0.030	11.00 13.00	0.60 0.80

◆ Dimensions

	Hot Rolled	Forged
Diameter (mm)	10-130	60-500
Length (mm)	2000-5800	2000-5800
** We suggest ESR for the size over Φ300mm.

◆ Delivery Condition

EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤255HB,

Black surface or Machined surface (Peeled, Turned, Grinded), UT 100% Passed

◆ Characteristics

1. A kind of cold work tool steel with excellent wear resistance and edge holding ability

2. High surface hardness after heat treatment.

3. Medium toughness, but high compressive strength, and good through hardening

     properties and dimensional stability.

◆ Applications

Tool Steel Round Bar DIN 1.2436 is for making Cutting and drawing tools of high wear resistance, rolls with high dimensional stability, deep drawing tools, tools of wire, bar and tube production, cold shear blades for thin sheets.

◆ Heat Treatment

Annealing

800 to 850°C

Slow con trolled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C,

further cooling in air.

Hardness after annealing: max. 250 HB

Stress relieving

650 to 700°C

Slow cooling in furnace; intended to relieve stresses set up by extensive machining,

or incomplex shapes.

After through heating, hold in neutral atmosphere for 1 to 2 hours.

Hardening

950 to 980°C

Oil, salt bath (220 to 250°C or 500 to 550°C), air plast, still air.

Holding time after temperature equalization: 15 to 30 minutes.

Obtainable hardness: 64 - 66 HRC.

Special treatment: Hardening 1020°C and tempering at 500°C.

Obtainable hardness approx. 61 HRC (e.g. if followed by nitriding).

Slow heating to tempering temperature immediately after hardening/time in furnace

1 hour for each 20 mm of workpiece thickness but at least 2 hours/cooling in air.

For average hardness figures to be obtained please refer to the tempering chart.

For certain cases we recommend to reduce tempering temperature and increase holding

time.