Heat Treatment

For long-lasting durable pieces

Nothing lasts forever: workpieces are subject to wear and tear. Preventing this process from happening as long as possible has economic benefits. And this is where the Lingenhöle heat-treatment technology comes into play.

Have components with high metallurgical and/or tribological requirements? Need support in choosing the right material and/or heat-treatment process for your requirements? Looking for an expert and flexible partner to carry out your desired heat treatment? Then you have come to the right place.

With Lingenhöle heat-treatment technology, we offer the optimal thermal and thermochemical processes for all your components and requirements. Our thermal heat-treatment services range from classic annealing processes to quenching and tempering and induction hardening. Our medium-frequency induction system is specially designed for round parts with hardening lengths of up to 5,000 mm and diameters of 450 mm.

As part of our thermochemical process spectrum, we have units for case hardening and carbonitriding as well as gas, plasma and salt-bath nitriding or nitrocarburizing. We can also offer vacuum hardening for hardening of cold work, hot work and high-speed steels.

The combination of the right materials, the right heat-treatment process and our in-depth expertise ensures that our finished parts will be tough enough for every situation.

Heat treatment for durability and resistance

Comparison of methods

We offer a comprehensive range of services for the heat treatment of steel, cast materials, aluminum and copper: from competent material advice from our in-house laboratory to the wide range of processes in our hardening facility. This table provides a quick overview of which process can be used for which material and which process-specific properties can be achieved.

Material groups	Standard designation	Vacuum Hardening	Induction Hardening	Case hardening, Carbonitriding, Tempering	Gas Nitrocarburising – LTGNCOX			Salt Bath Nitrocarburising – TENIFER			Micropulse Plasma Nitriding – PLASOX

		Surface Hardness in HRC	Surface Hardness in HRC	Surface hardness up to 64 HRC	Surface hardness HV1	max. Nitration hardness depth in mm	Compound layer thickness CLT in µm	Surface hardness HV1	Nitration hardness depth in mm	Compound layer thickness CLT in µm	Surface hardness HV1	Nitration hardness depth in mm	Compound layer thickness CLT in µm

Structural steel
1.0037	S235JR	—	—	yes	280-400	0,30-0,60	5-20	280-400	0,30-0,60	5-20	280-400	0,30-0,60	5-20
1.0570	S355J2G3	—	—	yes	300-450	0,30-0,60	5-20	300-450	0,30-0,60	5-20	300-450	0,30-0,60	5-20

Tempered steel
1.1181	C35E	—	50-54	conditional	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20
1.1191	C45E	—	55-60	conditional	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20
1.1221	C60E	—	58-64	—	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20	300-500	0,30-0,60	5-20
1.6580	30CrNiMo8	—	50-55	conditional	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20
1.6582	34CrNiMo6	—	51-56	conditional	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20
1.7033	34Cr4	—	51-57	conditional	500-600	0,20-0,50	5-20	500-600	0,20-0,50	5-20	500-600	0,20-0,50	5-20
1.7220	34CrMo4	—	52-57	conditional	500-600	0,20-0,50	5-20	500-600	0,20-0,50	5-20	500-600	0,20-0,50	5-20
1.7225	42CrMo4	—	54-60	conditional	600-750	0,20-0,50	5-20	600-750	0,20-0,50	5-20	600-750	0,20-0,50	5-20
1.8159	51CrV4	—	57-62	—	550-700	0,20-0,50	5-20	550-700	0,20-0,50	5-20	550-700	0,20-0,50	5-20
1.8161	58CrV4	—	58-64	—	550-700	0,20-0,50	5-20	550-700	0,20-0,50	5-20	550-700	0,20-0,50	5-20

Nitriding steel
1.8519	31CrMoV9	—	—	—	750-900	0,20-0,50	5-20	750-900	0,20-0,50	5-20	750-900	0,20-0,50	5-20
1.8550	34CrAINi7-10	—	—	—	850-1100	0,20-0,50	5-20	850-1100	0,20-0,50	5-20	850-1100	0,20-0,50	5-20

Case-hardening steel
1.0401	C15	—	—	yes	300-450	0,20-0,50	5-20	300-450	0,20-0,50	5-20	300-450	0,20-0,50	5-20
1.2162	21MnCr5	—	—	yes	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20	600-800	0,20-0,50	5-20
1.6587	18CrNiMo7-6	—	—	yes	600-700	0,20-0,50	5-20	600-700	0,20-0,50	5-20	600-700	0,20-0,50	5-20
1.7131 / 1.7139	16MnCr5	—	—	yes	600-750	0,20-0,50	5-20	600-750	0,20-0,50	5-20	600-750	0,20-0,50	5-20
1.7147	20MnCr5	—	—	yes	600-700	0,20-0,50	5-20	600-700	0,20-0,50	5-20	600-700	0,20-0,50	5-20

Ball bearing steel
1.2510	100MnCrW4	—	61-66	—	500-700	0,10-0,30	5-20	500-700	0,10-0,30	5-20	500-700	0,10-0,30	5-20
1.3505	100Cr6	—	61-66	—	450-700	0,10-0,30	5-20	450-700	0,10-0,30	5-20	450-700	0,10-0,30	5-20

Cold work steel
1.2083	X42Cr13	to 58	—	—	—	—	—	850-1150 *	0,10-0,20	5-20	850-1150 *	0,10-0,20	5-20
1.2312	40CrMnMoS8-6	to 52	50-55	—	650-800	0,10-0,30	5-20	650-800	0,10-0,30	5-20	650-800	0,10-0,30	5-20
1.2363	X100CrMoV5-1	to 63	60-65	—	—	—	—	950-1200 *	0,10-0,20	5-20	950-1200 *	0,10-0,20	5-20
1.2379	X155CrVMo12-1	to 63	—	—	—	—	—	900-1200 *	0,10-0,20	5-20	900-1200 *	0,10-0,20	5-20

Hot work steel
1.2343	X38CrMoV5-1	to 54	52-58	—	—	—	—	850-1150 *	0,15-0,40	5-20	850-1150 *	0,15-0,40	5-20
1.2344	X40CrMoV5-1	to 54	53-58	—	—	—	—	850-1150 *	0,15-0,40	5-20	850-1150 *	0,15-0,40	5-20
1.2365	X32CrMoV3-3	to 52	55-60	—	—	—	—	700-900 *	0,15-0,40	5-20	700-900 *	0,15-0,40	5-20

Stainless steel
1.4021	X20Cr13	to 50	48-52	—	—	—	—	850-1200 *	0,10-0,20	3-15	850-1200 *	0,10-0,20	3-15
1.4034	X46Cr13	to 54	52-58	—	—	—	—	850-1200 *	0,10-0,20	3-15	850-1200 *	0,10-0,20	3-15
1.4112	X90CrMoV18	to 60	50-55	—	—	—	—	900-1150 *	0,10-0,20	3-15	900-1150 *	0,10-0,20	3-15
1.4122	X39CrMo17-1	to 49	42-46	—	—	—	—	900-1150 *	0,10-0,20	3-15	900-1150 *	0,10-0,20	3-15
1.4571	X6CrNiMoTi17-12-2	—	—	—	—	—	—	900-1150 *	0,10-0,20	3-15	900-1150 *	0,10-0,20	3-15

Casting materials
EN-JS 1030	EN-GJS 400-15	—	—	—	—	—	—	400-600	0,20-0,50	5-20	400-600	0,20-0,50	5-20
EN-JS 1060	EN-GJS 600-3	—	—	—	—	—	—	450-650	0,20-0,50	5-20	450-650	0,20-0,50	5-20

* Nitriding reduces corrosion resistance.
All information is only a guide, large fluctuations possible. Please do not hesitate to contact us for further information.

System and Batch Sizes

	Diameter	Length	Width	Height
Induction Hardening	⌀ 600 mm	5000 mm
Case hardening / Carbonitriding / Tempering		900 mm	600 mm	600 mm
TENIFER Q, QP, QPQ / Salt bath nitrocarburising	⌀ 800 mm	1350 mm
LTPLASOX / Plasma nitriding	⌀ 950 mm	1200 mm
LTGNCOX / Gas nitrocarburising	⌀ 980 mm	5000 mm
Annealing under inert gas / Stress-relief annealing	⌀ 980 mm	5000 mm
Vacuum Hardening		900 mm	600 mm	600 mm
LTCOOL Freezing -120°C		900 mm	600 mm	600 mm
Levelling 160 tons	⌀ 250 mm	6000 mm
Levelling machine 40 tons	⌀ 60 mm	1000 mm
Sandblasting / Ceramic bead blasting	⌀ 1200 mm			1000 mm
Barrel grinding	⌀ 50 mm	250 mm