AISI L6 /DIN 1.2714 /JIS Skt4 Tool Steel Bar

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PRODUCTS DETAILS

Basic Info.

Model NO.
KM-143
Special Use
Mold Steel, Cold Heading Steel
Size
130mm-1000mm (Optional)
Length
2m,3m,5.8m, 6m, 8m or as Required.
Delivery Time
7-30 Days
Loading Port
Shanghai
MOQ
3 Tons
Certificate
ISO, BV, SGS, Mill Test Certificate
Packaging Detail
Standard Sea-Worthy Package
Surface
Bright, Black
Price Term
Ex-Work, Fob, CFR, CIF, etc.
Specifications
Flat Bar, Round Bar, Angle Bar, Square Bar
Transport Package
Standard Sea-Worthy Package
Specification
130mm-1000mm (optional)
Trademark
Kingmetal
Origin
China (Mainland)
Production Capacity
800tons/Month

Product Description

AISI L6 /DIN 1.2714 /JIS SKT4 tool steel bar
 

1.Supply Form & Size & Tolerance

Supply Form Size(mm) Process Tolerance



Round
Φ6-Φ100 Cold Drawn Bright/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

Standard Grade C Si Mn P S Cr Ni Mo V
ASTM A681 L6 0.65-0.75 0.1-0.5 0.25-0.80 0.03 0.03 0.6-1.2 1.25-2.0 0.50 -

DIN EN ISO 4957
1.2714
0.50-0.60

0.1-0.4

0.60-0.90

0.03

0.02

0.8-1.2

1.50-1.8

0.35-0.55

0.05-0.15
55NiCrMoV7
JIS G4404 SKT4 0.50-0.60 0.1-0.4 0.60-0.90 0.03 0.02 0.8-1.2 1.50-1.8 0.35-0.55 0.05-0.15

3.Physical Property

Density,kg/dm3 7.8
Specific heat capacity,J/g.K 0.46
Thermal conductivity ,W/m.K 35.9
Specific electric resist,Ohm mm2/m 0.3
Electrical conductivity,m/mm2 3.33
Modulus of elasticity long.,Gpa 215
Modulus of elasticity tang.,Gpa 82

4.Thermal Property

Temperature,°C 20-100 20-200 20-300 20-400 20-500 20-600 20-700
Thermal expansion,10^-6 m/(m*K) 12.5 13.1 13.4 13.9 14 14.3 14.5
Temperature,°C 20 350 700
Thermal Conductivity,W/(m*K) 35 39 36

5. Mechanical Property



Quenching at
860 °C in oil
Tempering 100°C 150°C 200°C 250°C 300°C 350°C 400°C 450°C 500°C 550°C 600°C 650°C
HB 634 615 595 577 543 512 482 468 442 409 390 -
HRC 59 58 57 56 54 52 50 49 47 44 42 -
R,N/mm 2 2420 2330 2240 2160 2010 1880 1760 1700 1580 1430 1340 -


Quenching at
860 °C in air
Tempering 100°C 150°C 200°C 250°C 300°C 350°C 400°C 450°C 500°C 550°C 600°C 650°C
HB 560 - 512 - 482 - 442 421 400 371 336 301
HRC 55 - 52 - 50 - 47 45 43 40 36 32
R,N/mm 2 2070 - 1880 - 1760 - 1580 1480 1390 1250 1110 1010

6.Forging

Heat the temperature to 750 oC - 800 oC ,hold for suitable time,then heat the temperature up to 1050oC,hold enough time for the steel to be thoroughly heated.Don't forge below 850oC.AISI L6 steel  should be cooled as slowly as possible in the furnance.Annealing is strongly recommended after forged.

7.Annealing

Annealing must be performed after hot working and before re-hardening.Heat the temperature to740- 760°C with a rate not exceeding 220°C per hour , and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 20°C per hour to 500°C. Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of 235 HBW.

8.Hardening

Prheat uniformly to  the temperature 650-700°C ,Quench in air with hardening temperature 870-900°C,or quench in oil with with hardening temperature 830-870°C,tempering should be followed as soon as possible.

9.Tempering

Heat uniformly to the required temperature allowing a soaking time of two hours per 25mm of ruling section. Withdraw from the furnace and allow to cool in air. A second tempering is highly recommended, the tool being allowed to cool to room temperature between tempers.

Temperature ,°C 200 250 300 400 500
Hardness , HRC 55 54 53 49 45

 

10.Application

AISI L6 is highly recommendable for Close Die Forgings due to its characteristics of high wear-resistance, extra toughness , high hardness which is achieved with Cr-Ni-Mo-V high graded alloys.

Typical applications includes Arbors, blanking dies, clutch parts, forming dies,disc saws, drift pins, brake dies, hand stamps,hubs, lead and feed screws, machine parts,punches, pawls, pinions, shear blades, spindles,spring collets, swages and etc.

AISI L6 /DIN 1.2714 /JIS Skt4 Tool Steel Bar
AISI L6 /DIN 1.2714 /JIS Skt4 Tool Steel Bar
AISI L6 /DIN 1.2714 /JIS Skt4 Tool Steel Bar



 

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