DB 6 STEEL
As the
designation itself implies, DB 6 is a Die Block Steel conforming presumably to
AISI L6 (U.S.) , SKT4 ( Japan ) and similar to DIN 1.2714 (Europe). Containing
Nickel (1.4 to 1.6%); Chromium (0.8 to 1.1%); Molybdenum (0.35 to 0.50%); and traces
of Vanadium; it is a borderline high-Carbon steel since its Carbon content is
between 0.55 and 0.60 and being higher than that of steels of the DIN 1.2714
class, it is harder without an increase in brittleness. Its Nickel content gives it great impact
resistance, while its Chromium content provides both, toughness and corrosion
resistance, so wear is minimal. It is also resistant to thermal shock and
thermal fatigue cracking. Molybdenum contributes to high temperature tensile
strength. In austenitic Chromium-Nickel steels it inhibits pitting and crevice
corrosion, even when Chloride and Sulphur levels are high.
VIRAT SPECIAL STEELS, INDIA supplying a versatile steel DB6
MOULD STEEL that may be used for both hot and cold work, and can be forged into
dies of all kinds. Being relatively expensive at around $ 1,800 a tone, in comparison
to steels suitable for work at lower temperatures, it is mainly used for “hot
work”.
The
ability to withstand repeated heating
and cooling cycles is a must for any die material for heat distortion creates
huge mechanical stress in addition to the thermal stress imposed by repeated
heating-cooling cycles. Further, hot-work die steel SKT4 ( DB6) TOOL STEEL should not only have high hardness, but should
retain much of that hardness at high temperatures too; besides exhibiting
qualities such as abrasion resistance, strength at high temperatures, thermal
fatigue stability, thermal conductivity and low thermal coefficient of
expansion even to high temperatures.
DB 6 DIE BLOCKS possesses all of these and so
it has become an
almost universal steel for forging dies such as press dies, extrusion dies,
trim dies, as well as dies for
Drop Forging Hammers and Mechanical Presses, Die Molds, Shoe Blocks, Die
Holder, Cassettes, Piston Rods, Cranks, Boaster, Shearing Blades, Tools, Plastic
Molds and Shafts.
VIRAT
SPECIAL STEELS, INDIA generally supplying DIN 2714 (AISI L6) in pre-toughened
condition; commonly through quenching and tempering to a force of 1300 N/mm². In
special cases it may be supplied after annealing. The working hardness is
between 370 to 410 HB for rounds or between 355 to 400 HB for squares and flats.
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