SILVER STEEL ROD BAR DIN 115CrV3/1.2210

CHEMICAL COMPOSITION

C: 1,1 0 - 1,25; Mn 0,20 -0, 40; Si 0,15 – 0,30; P MAX. 0,03 0; S MAX. 0,03 0; Cr 0, 50 – 0, 80; V 0,07 – 0,12

DELIVERY: HEAT TREATMENT ANNEALED 219 / 2 50 HB

SURFACE FINISHING: CENTERLESS GROUND Ra 0.8um

DIAMETERS: FROM 1mm TO 4 0mm

DIAMETER TOLERANCE: AS PER DIN 175 OR EQUIVALENT IS O h9.

AS PER REQUIREMENT WITH TOLERANCES h 8 OR h 7

DELIVERY LENGTHS: FROM 1METER TO 3 METERS

QUALITY: HIGH PRECISION EN SIZES; OPTIMAL MACHINABILITY ON ANNEALEAD STATUS; DEFECTS AND DECABURISATION FREE; EXCELENT FINISHING AND STRAIGHTNESS.

Properties

Chromium - vanadium alloyed cold work tool steel with high wear resistance,high edge holding properties,simple heat treatment, good machinability and toughness properties, bright ground and polishe d.

Applications

Silver steel for guiding pins, small tools and structural parts in precision mechanics, button type drills and jagged bits,screw taps, milling cutters, broaching tools, piercing punches, ejector pins, twist drills, punches and taps, surgical inst-ruments, reamers, countersinks, dowels, engraving tools, metal cutting saws, axles and shafts, toothed drills, scraping tools, gear cutters, mortice, wood chisels, guide rods.

Heat Treatment

Annealing:710 - 750 °C

Hardness after annealing:Max. 220 HB

Stress relieving:Approx. 650 °C

Hot forming:1050 - 850 °C

Hardening:780 - 810 °C or 810 - 840 °C

Quenching media:780 - 810 °C, Water

810 - 840 °C, Oil ( up to 15 mm diameter )

Hardness after quenching:64 - 66HRC

Hardness after tempering