AISI H11 | 1.2343 | SKD6 2018-11-06T12:36:44+00:00

Project Description

AISI H11 hot work tool steel Manufacturer and Exporter,supplied with round,square,flat,block,and shaft etc.AISI H11 is one of the Hot Work, Chromium type tool steels as per ASTM A681.It has good high-temperature strength,excellent toughness and ductility in all directions,excellent through-hardening properties,and high level of resistance to thermal shock and thermal fatigue.AISI H11 can be deep hardened by heat treatment and air-quenching.

aisi H11 tool steel

1.Supply Form & Size & Tolerance

Supply FormSize(mm)ProcessTolerance



Round
Φ6-Φ100Cold DrawnBright/Black Best H11

Φ16-Φ350

Hot Rolled
Black-0/+1mm
Peeled/ground Best H11

Φ90-Φ1000

Hot Forged
Black-0/+5mm
Rough Turned-0/+3mm

Flat/Square/Block
Thickness :120-800
Hot Forged
Black-0/+8mm
Width:120-1500
Rough Machined-0/+3mm

Remark:Tolerance can be customized as per requests

2.Chemical Composition

StandardGradeCSiMnPSCrVMo
ASTM A681H110.35-0.450.8-1.250.2-0.60.030.034.75-5.50.3-0.61.1-1.6
DIN ISO 49571.23430.28-0.350.8-1.20.1-0.40.030.032.7-3.20.4-0.71.1-1.5
JIS G4404SKD60.32-0.420.8-1.20.50.030.034.5-5.50.3-0.51.0-1.5
BS 4659BH110.32-0.400.85-1.150.40.350.354.75-5.250.3-0.51.25-1.75

3.Physical Property

Temperature 20°C 200°C 400°C 600°C
Density,kg/m37800775077007600
Modulus of elasticity,Mpa210000200000180000140000
Coefficient of thermal expansion from 20°C,per °C11.6 x 10^-612.4 x 10^-613.2 x 10^-6
Thermal conductivity,W/m °C303031

4. Mechanical Property

Hardness,HRC4546.548.5
Tensile strength,Mpa145015801680
Yield strength Rp 0.2,Mpa124013401410
Elongation A5 ,%131312
Reduction in area Z,%656564

5.Forging

H11 tool steels are forged at 900- 1120°C .Reheat is necessary when temperature below 900°C ,AISI H11 steel  should be cooled as slowly as possible in the furnace,annealing is recommended after forged.

6.Stress Relieving

Stress relieving to remove machining stresses should be carried out by heat to 650°C, holding for one hour at heat, cooling in the furnace. This operation is performed to reduce distortion during heat treatment.

7.Annealing

Heating slowly and uniformly to 845~900℃, furnace cooling to 540℃ at a rate 10~20℃ per hour, obtain hardness HB 229 max.

8.Hardening

Harden from a temperature of 1000-1040℃ followed by air, oil quenching or warm bath quenching 500-550℃
C. Hardness after quenching is 50-56 HRC.

9.Tempering

Temper at 540°C to 650°C for Rockwell C hardness of 54 to 38.Temper minimum twice with intermediate cooling to room temperature. Holding time at temperature is minimum 2 hours.

Tempering,℃100200300400500550600650700
HRC535252525452483830
Rm,N/mm218451790179017901910179015701200970

10.Application

AISI H11 is widely usd for highly stressed hot work tools,typical use are:
1.Extrusion Industry: Dies and Contatiner for Extrusion
2.Forging Industry: Forming Dies, Press Dies
3.Die Casting Industry: Dies for Die-Carbide
4.Aircraft Industry: Landing Gears, Arrester Hooks

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