1. Heat-resistant castings

Grates and charging systems

Base grid / Base tray

Base trays form the "basis" of almost every type of furnace. They are used directly as charge carriers or in connection with fixture structures and as charging fixtures made of high-alloyed steel cast. Lohmann manufactures base trays in a wide variety of different sizes and has numerous models available.
The product range extends from individual parts with sizes of up to 1400 x 1600 x 130 mm to mass production series containing several 1000 parts.
Our products (hardening equipment, hardening accessories) are used in particular in chamber furnaces, pusher-type furnaces, vacuum furnaces, industrial furnaces, conveyor furnaces, and shaft furnaces.

Stackable grid / Stackable tray

Stackable trays that are customized to meet the requirements profile are used in the mass production of transmission parts in particular. As a supplier for hardening shops with their own design departments, Lohmann offers its customers support as early as the planning phase. Our customers appreciate our consulting and engineering services for these charging components made of heat-resistant cast steel.
We would be pleased to "develop" tailor-made solutions for your process as well.

Charging fixtures

Charging systems, being the link between the workpieces to be treated and the furnace, straightening machine, or everything in between, play an especially important role. We manufacture base grids, top grids, and charging supports made of heat-resistant steel in standard dimensions based on a modular design or according to the customer's individual requirements. Through intensive dialogs between users and foundries, it is possible to develop the most economical solution by optimally adapting the charging fixtures to the (usually) fully automatic production process.

Baskets and meshes

Baskets

Our cast baskets are characterized in particular by their extreme durability. We offer a wide range of standard baskets. Custom baskets are also possible, in which case they are individually adapted to the customer requirements. Our baskets are finished using the mesh of your choice. We can also overhaul or repair your baskets at our facilities, of course.

Meshes

To be able to fulfill the large number of different requests from our customers, Lohmann maintains a comprehensively stocked warehouse of meshes in different qualities and mesh sizes. We can also deliver pressure welded gratings, perforated sheets, and expanded metal.

Pit furnace fixtures

Pit furnace fixtures

Pit furnace fixtures are a particular strength of Lohmann. We are able to offer our standardized, third generation shaft furnace fixtures in diameters from 650 to 2000 mm without modeling costs. These fixtures are characterized especially by their low empty weight in combination with a high loading capacity as well as enormous flexibility. We naturally will provide all necessary load curves as well as the corresponding CE Declaration of Conformity. Crack testing as well as functional testing and, if necessary, servicing are also part of the Lohmann portfolio of services offered.

Cast link belts

Cast link belts

Cast link belts and furnace conveyor belts for the high and low temperature range can be delivered as finished components for continuous furnaces. The individual links are formed according to the customer's requirements with breakouts, overlaps, bars, cams, or curves according to the process technology and quality of the heat treatment process. Our offer is rounded off by ready-to-install drive and deflection rollers as well as conveyor rollers.
If desired, we can also give your cast link belt a general overhaul in our facilities.

Furnace drums

Furnace rolls

We manufacture a number of different furnace rollers in a wide variety of diameters and lengths. From a single part to mass-produced parts and a wide range of materials, almost every design of furnace roll is possible. 

Furnace accessories

Support beams/lifting beams, fan impellers, radiant heating tubes

Lohmann offers furnace accessories such as slotting heads, support beams, lifting beams, fan impellers, chain guides, rollers, and radiant heating tubes for a whole range of different furnace types.

Anchors for fireproof linings

Anchors for fireproof linings

A number of anchors, brackets, and threaded studs are needed to produce refractory linings in industrial furnaces. Lohmann also offers a wide range of products made of various materials for this area, too.

Material table

Norm
Werkstoff‑Nr.
Standard
Material No.		Lohmann
Werkstoff‑Nr.
Lohmann
Material No.		Werkstoff Bezeichnung
Material Designation		Hauptlegierungselemente
in Masse‑%
Richtanalyse
Main alloy elements in mass %
Componential analysis		höchste Anwendungstemperatur in Luft in °C
highest
application temperature
in the air in °C		Versprödungsbereich °C
Embrittlement range °C		Beständigkeit gegenüber Gasen
Resistance to gases
CSiCrNiSonstige
Other		400–500600–900schwefelig
(reduzierend) a)		stickstoffhaltig
sauerstoffarm b)		carburazione c)
1.47101.4710GX30CrSi70,31,8775000+++++
1.47291.4729GX40CrSi130,41,81385000+++++
1.47401.4740GX40CrSi170,41,817900++++++++
1.47431.4743GX160CrSi181,61,818900+++++++++
1.47451.4745GX40CrSi240,41,4241050+++++++++
1.47761.4776GX40CrSi280,41,8281150+++++++++
1.47771.4777GX130CrSi291,31,8291100+++++++++
1.48231.4823GX40CrNiSi27-40,41,82741100+++++++++
1.48251.4825GX25CrNiSi18-90,252,018990000+++++
1.48261.4826GX40CrNiSi22-100,42,022109500+++++++
1.48321.4832GX25CrNiSi20-140,252,0201495000+++++
1.48371.4837GX40CrNiSi25-120,42,0251210500++++++
1.48401.4840GX15CrNi25-200,151,3252011000+++++++
1.48481.4848GX40CrNiSi25-200,42,0252011000+-+++++
1.48051.4805GX35NiCrSi25-210,351,82125100000++++++
1.48061.4806GX40NiCrSi35-170,42,01735100000-++++++
1.48071.4807GX40NiCrSiNb35-180,42,01835Nb100000-++++++
1.48491.4849GX40NiCrSiNb38-190,42,01938Nb102000-++++++
1.48521.4852GX40NiCrSiNb35-260,42,02635Nb110000-++++++
1.48551.4855GX40CrNiSiNb24-240,42,02424Nb105000-+++++
1.48571.4857GX40NiCrSi35-260,42,22535110000-++++++
1.48591.4859GX10NiCrSiNb32-200,11,22032Nb105000-++++++
1.48651.4865GX40NiCrSi38-190,42,01938102000-++++++
1.48691.4869GX50NiCrCoW35-25-15-50,51,82535Co, W120000+++++++
1.48741.4874GX50NiCrCo20-20-200,50,82020Co, W, Nb115000+++++++
1.48891.4889GX40NiCrNb45-350,41,5*35*45Nb11600(+)-++++++
2.46802.4680G-NiCr50Nb0,10,85050Nb1050**00+++++++
2.47782.4778G-CoCr280,121,02850Co1200***00+++++++
2.48152.4815G-NiCr150,41,81560110000+++++++
-2.4851G-NiCr23Fe0,080,52360Al, Ti120000+++++++
2.48792.4879G-NiCr28W0,41,82848W115000-+++++++
-3.4848GX15CrNiSi25-200,152,0252011000+-+++++
-4.4848GX40CrNiSiNb25-200,42,02520Nb11000+-+++++
-4.4879G-NiCr28W0,251,82848W115000-+++++++
-4.4952G-NiCr22Al0,20,72275Al, Ti, Zr115000-+++++++
-5.4848GX20CrNiSiNb25-200,22,02520Nb11000+-+++++
-5.4849GX15NiCrSiNb38-190,152,01938Nb102000-++++++
-5.4865GX20NiCrSi38-190,22,01938102000-++++++
-6.4849GX25NiCrSiNb38-190,252,01938Nb102000-++++++
* bei Betriebstemperatur < 1000°C mit abgesenktem Cr- und Si-Gehalt / at operating temperature < 1000°C with lowered Cr- and Si-concentrationa) sulphurous (reductive)
** bei Ölascheangriff max. 950°C / at oil ash attack max. 950°Cb) nitrogenous / oxygen low
*** für zyklische Erwärmung max. 1100°C / for cyclical heating max. 1100°Cc) carburize
0 = keine Versprödung / no embrittlement+ = Versprödung / embrittlement++ = Versprödung in kurzer Zeit / embrittlement after short time
++++ =sehr hoch / very high+++ = hoch / high++ = mittel / medium+ = gering / low- = sehr gering / very low

Lohmann
Werkstoff‑Nr.
Lohmann
Material No.
mechanische und physikalische Eigenschaften / mechanical and physical propertiesVerwendungshinweise
Application note for further use
mittlere Spannung O1% in MPa für
1% Dehnung nach 10000 h bei °C
medium tension O1% in MPa for
1 % expansion after 10000 h at °C		Wärmeausdehnung 10-6 · K-1
zwischen 20°C und °C
Thermal expansion 10-6 · K-1
between 20 °C and °C		spezifische Wärme
J / (kg · K) bei °C
specific heat
J / (kg · K) at °C		Wärmeleitfähigkeit W/(m·K) bei °C
Thermal conductivity W/(m·K) at °C
60070080090010001100400800100020201008001000
1.4710 1982,5


12,513,5
46024


für geringe mechanische Beanspruchung, Beständigkeit
gegenüber schwefeligen Gasen /
for low mechanical strain, durability against sulphuric gases
1.4729 2293,51

12,513,5
4602424,830
1.4740 2293,51

12,513,5
460
20

1.4743 251041,5

12,513,5
50018,8


1.4745 2293,51

12,5141650018,8


1.4776 261151,5

11,5141650018,821

1.4777 261151,5

11,5141650018,8


1.4823 2815841
1314,516,650016,7213539,6für mittlere mech. Beanspruchung bei mgl. Dauertemp. > 900°C/ 1)
1.4825 7844229

17,418,318,850014,815,52630für hohe mech. Beanspruchung und hoher Zähigkeit bei
Temperaturen > 950°C, gute Temperaturwechselbeständigkeit /
for high mechanical strain and high viscosity at stable temperature
above 950°C, good resistance to thermal shocks
1.4826 82462310

17,218,318,8500141525,428,8
1.4832 82462310

17,218,319,3500141525,428,8
1.4837
5026136
17,518,419,3500141525,428,8für hohe mech. Beanspruchung bei möglichst
Dauerbeanspruchung > 900°C /
for high mechanical strain at stable temperature
above 900°C
1.4840
4521105
16,517,918,5500



1.4848
65361772,517181950014,616,72528
1.4805
8045227,5
16,417,518,2500
1423,827,7für sehr hohe mech. Belastbarkeit und für hohe Zähigkeitsanforderungen
bei Temperaturwechselbelastung bis ca. 1100°C
for very high mechanical strain and with high requirements on the viscosity
at alternating thermal stress load up to approx. 1100°C
1.4806
8030176315,31717,65001212,32326,8
1.4807





15,31717,65001212,32326,8
1.4849
6038208
15,31717,65001212,323,326,5
1.4852
724122931617,818,650012,81323,527,7
1.4855
8046227,5
16,81818,55001415,524,527,7
1.4857
7040208
15,717,418,350012,81323,827,7
1.4859
643615,55
17,618,719,550012,81323,827,7
1.4865
5532187315,31717,65001212,223,326,5
1.4869



176

17,35001012,6
28
1.4874


2717
15,216,517460
13,825
1.4889



8
14,315,315,7500
11,330,636,1
2.4680
7138186,8
13151545014,2


für höchste Temperaturbelastung bis ca. 1200°C,
hervorragende Temperaturwechsel- und Zunderbeständigkeit in
oxidierender Atmosphäre /
for highest thermal stress up to approx. 1200°C,
excellence resistance to thermal fatigue stress and resistance to
scaling in oxidising atmosphere
2.4778
7034169,541516175008,5
21
2.4815





13,315,316,5460
12,52427,5
2.4851





14,816,717,745011,3


2.4879
70412210414,415,716,35001111,330,636,1
3.4848
6334166217181950014,616,72528für höhere Zähigkeit vs. 1.4848 / for higher viscosity vs. 1.4848
für höhere Temperaturwechselfestigkeit vs. 1.4848 /
for higher thermal shock resistance vs. 1.4848
wie 2.4879, jedoch mehr Zähigkeit /
like 2.4879, but with more viscosity
4.4848
66371882,517181950014,616,723,811,3
4.4879
70412210414,415,716,35001111,330,636,1
4.4952













für höchste Temperaturbelast. u. hoher Aufkohlungsbeständigkeit / 2)
5.4848
6334166217181950014,616,72528wie entsprechende Normwerkstoffe, jedoch mit verbesserterTemperaturwechselbeständigkeit und Zähigkeit /
like the corresponding standard material, but with revised resistance
to thermal fatigue stress and viscosity
5.4849
6038208
15,31717,65001212,323,326,5
5.4865
5532187315,31717,65001212,223,326,5
6.4849
6038208
15,31717,65001212,323,326,5

1) for medium mechanical strain at stable temperature above 900°C

2) for highest thermal stress and high resistance against carbonisation