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Zmanjševanje napetosti

Naš izbran nabor omogoča za skoraj vsak primer uporabe ustrezen material.

1.2842 Steel for through hardening

Designation

DIN:90 MnCrV 8
AFNOR:90 MV 8
UNI:90 MnVCr 8 KU
AISI:≈ O2

Chemical composition:

C0.90
Si0.20
Mn2.00
Cr0.40
V0.10

Strength:

max. 230 HB
(≈ max. 780 N/mm²)

Thermal conductivity at 100 °C:

33 W/m K


Character:

steel for through-hardening with good machinability and high wear resistance; low warping and high dimensional stability; with high toughness and through hardenability (uniform hardness for cross sections 40 mm)

Application:

cavity plates and inserts exposed to abrasive stress; cutting punches; wear plates, cutting dies and guiding plates; guiding rails


Treatment by

unusual:
Polishing, etching, nitriding » 1.2379

is possible:
EDM, hard chroming


Heat treatment:

Soft annealing:
680 to 720 °C for about 2 to 5 hours; slow controlled cooling of 10 to 20 °C per hour to about 600 °C; further cooling in air, max. 220 HB

Hardening:
790 to 820 °C
Quenching in oil/hot bath
Obtainable hardness: 63-65 HRC

Tempering:
slow heating (to avoid forming of cracks) to tempering temperature immediately after hardening; tempering twice with intermediate cooling down to 20 °C increases the steel's toughness

max. obtainable hardness after tempering: 58−60 HRC

Annealing graph:


Technical tip:
  • Steel grade 1.2510 is an adequate alternative with regards to its properties, machinability and dimensional stability after heat treatment

To the mould making overview To the die making overview

Available in the web shop as:
Data sheet 1.2842

Odpri PDF

Material grades brochure

Material grades brochure

Material grades poster

Material grades poster

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