For Immediate Onsite or Remote Support Call: +86-159-99718496

1.2714 55NiCrMoV7 SKT4 alloyed hot work tool steel

Category: Hot Work Steel
Tags: Hits: 117

1.        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.

 

2.        Chemical analysis:

C

Si

S

P

Mn

Cr

V

Mo

0.50~0.60

0.10~0.40

0.005

0.025

0.60~0.90

0.80~1.20

0.05~0.15

0.35~0.55

 

3.        Mechanical 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 harden-ability, low P and S content, polishable. Suitable for pitting and chrome plating. This grade is produced on request annealed or quenched and tempered condition.

 

4.        Compared grades, based on usage:

American

German

Japanese

EN

ASTM

DIN

JIS

ISO 4957

L6

1.2714

SKT4

55NiCrMoV7

 

5.        Condition of delivery:

1.      Soft annealed to max 248 HB

2.      Quenched and tempered, 1100-1350MPa.

6.        Available sizes:

   Round Bar: Φ 12-410mm

   Flat: 8-160*205-710mm

   Mould: 200*200-1200*1000mm

   Length: 3000-12000mm

Mill deliver conditions, or sawing or cutting for customer request.

 

7.        Physical properties:

Temperature [oC]

20-100

20-300

20-500

20-600

Thermal expansion [10-6.K-1]

12.3

13.4

14.1

14.4

Temperature [oC]

20

350

700

 

Heat conductivity [W.m-1.K-1]

35.9

38.2

34.8

 

 

8.        Heattreatment:

Recommended temperatures for heat processing

 Hardness

Soft annealing:

Temperature [oC]

Cooling

max. 248 HB

650-700

Furnace

Annealing after decreasing stress:

Temperature [oC]

Cooling

 

600-650

Furnace

Hardening and tempering:

Temperature  [oC]

Hardening

Tempering 

840-890

Oil, pressure gas (N2), air, vacuum, warm bath

 see tempering

diagram

 

Hardness after quenching :

 52 - 58 HRC, Oil

 44 - 50 HRC, Air

Related Products
Related Archives