Thermal Process Technology

Salt-Bath Furnaces, electrically (TS) or gas heated (TSB) for Heat Treatment of Steel or Light Metals

TS 40/30 with exhaust gas collection at crucible rim TSB 30/30 with exhaust gas collection at crucible rim

Salt bath plant for annealing of aluminum components in the aircraft industry

TS 20/15 - TSB 70/90

Salt-bath furnaces offer remarkably high temperature uniformity and excellent heat transfer to the work piece. Our salt-bath furnaces TS 20/15 - TS or TSB 70/90 are especially useful for heat-treating of metals in neutral or active salt baths. Processes such as carbonitriding (e.g. Tenifer) up to 600 °C, carburizing up to 950 °C, or bright annealing up to 1000 °C can be realized. In their standard version these furnaces are equipped with safety technology for heat treatment of steel. As addional feature they can be equipped with extended safety technology for heat treatment of light metals.

Standard Model

  • Maximum temperatures of 750 °C or 1000 °C in the salt bath
  • Safety technology according to EN 60519-2
  • Useful for heat treatment of steel
  • Bath temperature control
  • Electric (TS) all-round heating or gas heating (TSB)
  • Removable collar plate made of solid steel
  • Insulated swing-a-way lid
  • Optimum temperature uniformity according to DIN 17052-1 up to ΔT 4 K in the bath
  • Over-temperature limiter controller in the furnace chamber to prevent dangerous conditions for the furnace or personnel
  • Cascade control of salt bath and furnace chamber


  • Type P: low carbon steel, CrNi plated and corundum coated for carburizing baths up to 950 °C, neutral salt and annealing baths up to 850 °C
  • Type C: high alloy CrNi steel for neutral salt and annealing baths up to 1000 °C

Additional Equipment

  • Exhaust gas collection at rim for connection to an exhaust system
  • Custom dimensions
  • Enhanced safety systems for heat treatment of aluminium and magnesium in the salt bath with second over-temperature limiter controller and PLC-bath control with thermocouples in the salt bath and in the furnace chamber
ModelTmaxInner dimensions crucibleVolumeOuter dimensions in mmSupplyElectricalWeight
 °C²Ø in mmh in mmin lWDHpower/kW¹connections*in kg¹
TS 20/1575023050020850970800163-phase650
TS 30/18750300500309501070800203-phase700
TS 40/307504005006010501170800333-phase750
TS 50/4875050060011011501270970583-phase1000
TS 60/63750610800220125013701170703-phase1200
TS 70/727507001000370135014701370803-phase1500
TS, TSB 20/20100023050020850970800213-phase650
TS, TSB 30/301000300500309501070800333-phase700
TS, TSB 40/4010004005006010501170800443-phase750
TS, TSB 50/60100050060011011501270970663-phase1000
TS, TSB 60/721000610800220125013701170803-phase1200
TS, TSB 70/90100070010003701350147013701003-phase1500
¹Only for electric version *Please see page 32 for more information about supply voltage
²Salt bath temperature