Similar Grades: L6, SKT4, 55NiCrMoV7
Standard: Germany DIN
Shape: Round , Square , Flat
Size:
Round bar:
Diameter : 1mm-2000mm
Square bar:
Size: 50mm * 50mm-600mm *600mm
Flat bar:
Size: Thickness: 0.1mm-800mm Width: 10mm to 1500mm
Pipe:
Size: OD: 6-219mm WT: 1-35 mm.
Cold-rolled sheet:
Thickness: 2-5mm Width:1000mm Length: 2000mm
Hot-rolled sheet:
Thickness:6-80mm Width: 210-610mm
Length: We can supply any length based on the customer's requirement.
Surface Condition:
Black,Grinded, Peeled, Polished.
Delivery Condition:
Annealed,Q+T
Furnaces for metallurgical processing:
electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection:
100% ultrasonic inspection for any inperfections or based on the customer's requirement.
UTS according to SEP 1921 C/c,D/d,E/e;A388 or GB/T 6402
Classification: Cold working alloy tool steel
Chemical composition
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
V |
| 0.50-0.60 |
0.10-0.40 |
0.65-0.90 |
MAX0.025 |
MAX0.005 |
0.80-1.20 |
0.35-0.55 |
0.05-0.15 |
| Ni |
|
|
|
|
|
|
|
| 1.50-1.80 |
|
|
|
|
|
|
|
Properties :
Cr-Ni-Mo alloyed hot work tool steel with high temperature impact toughness and thermal fatigue strength, resistant to
repeated shocks, high resistant to tempering, medium wear resistance, oil and air hardening with good through hardenability,
low P and S content, polishable. Suitable for pitting and chrome plating. This grade is produced on request annealed
or quenched and tempered condition.
Physical Properties :
Density : at 20 °C 7,80 kg/dm3
Thermal expansion between : 20 °C and... °C, 10-6 m/(mK)
Thermal conductivity : at 20 °C 36,0 W/(m.K)
| 100ºC |
200ºC |
300ºC |
400ºC |
500ºC |
| 12.5 |
13.1 |
13.4 |
13.9 |
14.0 |
Applications :
Forging dies of all types, hammer forging dies up to largest dimensions, tools for tube and rod extrusion such as rams,
bolsters, mandrels, plungers, sleeves, die holders, backing plates, chipping beds, press dies for mould parts, deep engraving
dies, containers for die casting presses, hot forming dies, bending and heavy embossing tools, hot mill rolls, hammers
and pile drivers, hot punching tools, very hard cold work dies and punches, hot shear blades, blocks for dies, forging
saddles, pressing spindles, shrink rings, armoured trim dies, hydro forming tools, plastic moulds, hot gripper and
heading dies.
Heat Treatment :
Annealing : 650 - 700 °C
Hardness after annealing : Max. 248 HB
Stress relieving : Approx. 650 °C
Hot forming : 1100 - 850 °C
Hardening : 830 - 870 °C or 870 - 900 °C
Quenching media : 830 - 870 °C Oil, 870 - 900 °C Air
Hardness after quenching : 52 - 58 HRC, Oil 44 - 50 HRC, Air
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