DIN 1.2345 Forged / Hot Rolled Steel Rod 10mm / 20mm Steel Round Bar

DIN 1.2345 Die Steel , Hot Work Tool Steel Round Bars for Forging Dies , Aluminum Extrusion Dies

Description:

◆ Equivalence

◆ Chemical Composition (%)

◆ Delivery Condition

EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤229HB,

Black surface or Machined surface, UT 100% Passed

◆ Characteristics

1. Hot work tool steel designed particularly for applications requiring extreme toughness      

    combined with good red hardness. It provides an extra margin of safest in tools subject

    to heavy hammer blows, and those tools containing deep recesses or sharp corners.

2. It is also used in many cold work applications where extra toughness is required at the

    sacrifice of some wear resistance.

◆ Applications

Tools requiring resistance to softening at elevated temperatures. Such tools include forging dies and punches, die-casting dies, aluminum extrusion dies, hot heading dies, piercing and forming punches, etc. 

◆ Heat Treatment

750 to 800°C (1382 to 1472°F)

Slow controlled cooling in furnace at a rate of 10 to 20°C/hr (50 to 68°F/hr) down to approx. 600°C (1112°F), further cooling in air.

Hardness after annealing: max. 235 HB.

Approx. 650°C (1202°F)

Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes.

After through heating, hold in neutral atmosphere for 1 - 2 hours.

1050 to 1100°C

Oil, salt bath (500 - 550°C), air

Holding time after temperature equalization: 15 to 30 minutes.

Obtainable hardness:

57 - 59 HRC oil or salt bath hardening,

54 - 57 HRC air hardening.

Slow heating to tempering temperature immediately after hardening/time in furnace: 1hour for every 20 mm of work piece thickness, but not less than 2 hours/ air cooling (minimum holding time: 1 hour).

1st tempering and 2nd tempering to desired working hardness.

Average obtainable hardness values are shown in the tempering chart.

3rd tempering for stress relieving, 30 - 50°C be low highest tempering temperature.