Bright steel
Bright steel from GMH Gruppe stands for maximum precision, quality, and flexibility — from the starting material to the ready-to-assemble component.
With decades of experience, state-of-the-art equipment, and comprehensive materials expertise, we produce hot-rolled and peeled bar steel in Special Bar Quality (SBQ) exactly to customer specifications.
Manufactured on high-performance bright-steel lines, our products are peeled, straightened and polished, and ground to the tightest tolerances (h6 per ISO 286). Combined with heat treatments (+QT, +AC, +FP), precision machining, and advanced testing methods, we supply bright steel that meets the highest requirements in automotive, mechanical engineering, energy, and mobility applications.
Product Portfolio & Dimensions
| Produkt | Ø range | Special features |
|---|---|---|
| Bright steel h9 | 5 – 250 mm | Peeled, straightened-and-polished, precision manufactured |
| Bright steel h9 | >250 – 320 mm | Peeled, precision manufactured |
| Bright steel h6 | 20 – 160 mm | Peeled, straightened-and-polished, ground |
| Guide shafts (induction hardened) | 20 – 140 mm | Surface hardened, ISO tolerance h6 |
Steel Grades and Applications
Quality Steel
- Composition: Unalloyed or alloyed quality steels, including fine-grain structural grades suitable for welding.
- Defined requirements: Typically specified for toughness, grain size, and/or formability.
- Cleanliness: No special requirements regarding non-metallic inclusions or steel cleanliness (in contrast to unalloyed or alloyed stainless steels).
- Heat treatment intent: Generally, not intended for quenching and tempering or surface hardening; for such applications, unalloyed or alloyed stainless steels should be used.
Typical applications:
- Structural steels
- Steel construction elements
Samples from our Portfolio
DIN EN 10277 and DIN EN 10278
Material no.
1.0038
Name
S255JR
Material no.
1.0401
Name
C15
Material no.
1.0503
Name
C45
Material no.
1.0570
Name
S355J2
Material no.
1.9426
Name
SAE 1027
Your contact for high-quality steel
We manufacture all our products to customer specifications. So what are your specifications?
Please feel free to contact us. Together we will find your perfectly customized solution.
Marco Altenhöfer
Sales Director Peeled Bars & CNC
Quenched and Tempered Steel
- Definition & standards: Unalloyed or alloyed steels for quenching and tempering per EN ISO 683-1/-2 and, where applicable, EN 10269.
- Typical use: Intended for quenched-and-tempered and flame- or induction-hardened machine parts; in some cases, also used in the normalized condition.
- Load profile: Suitable for components subjected to high static and dynamic loads.
- Selection guidance:
- Unalloyed QT steels for thinner cross-sections and lower requirements.
- Alloyed QT steels for thicker cross-sections and higher requirements.
Typical applications:
- Drive shafts
- Ball hubs
- Flanges
- Rotor shafts
- Connecting rods
- Fasteners
- Linear systems
- Turbine and generator shafts
Samples from our Portfolio
DIN EN 10277, DIN EN 10278 and if applicable EN 10269
Material no.
1.1133
Name
20Mn5
Material no.
1.1191
Name
C45E
Material no.
1.1206
Name
C50E
Material no.
1.5094
Name
38Mn56
Material no.
1.5511
Name
35B2
Material no.
1.5531
Name
30MnB5
Material no.
1.6580
Name
30CrNiMo8
Material no.
1.7038
Name
37CrS4
Material no.
1.7182
Name
27MnCrB5-2
Material no.
1.7213
Name
25CrMoS4
Material no.
1.7225
Name
42CrMo4
Material no.
1.7228
Name
50CrMo4
Your contact for Quenched and Tempered Steel
We manufacture all our products to customer specifications. So what are your specifications?
Please feel free to contact us. Together we will find your perfectly customized solution.
Marco Altenhöfer
Sales Director Peeled Bars & CNC
Case Hardening Steel
- Definition & standard: Low-carbon steels for case hardening per EN ISO 683-3.
- Process route: Parts are carburized or carbonitrided and subsequently hardened.
- Purpose: Used where differing property profiles are required, for example gear components with different stresses at the tooth root and on the tooth flank.
- Use Case: Particularly suitable for components with differently stressed zones (e.g. tooth root vs. tooth flank).
Typical applications:
- Gears
- Shafts
Samples from our Portfolio
DIN EN 10277 and DIN EN 10278
Material no.
1.5919
Name
15CrNi6
Material no.
1.6523
Name
20NiCrMo2-2
Material no.
1.6571
Name
20NiCrMoS6-4
Material no.
1.6587
Name
18CrNiMo7-6
Material no.
1.7016
Name
17Cr3
Material no.
1.7121
Name
20CrMnS3-3
Material no.
1.7139
Name
16MnCrS5
Material no.
1.7147
Name
20MnCr5
Material no.
1.7151
Name
27MnCrS5
Material no.
1.7160
Name
16MnCrB5
Material no.
1.7264
Name
20CrMo5
Material no.
1.7323
Name
20MoCrS4
Material no.
1.7325
Name
25MoCr4
Material no.
1.8708
Name
20MnCrNiMo6-3
Your contact for case-hardened steel
We manufacture all our products to customer specifications. So what are your specifications?
Please feel free to contact us. Together we will find your perfectly customized solution.
Marco Altenhöfer
Sales Director Peeled Bars & CNC
Rolling Bearing Steel
- Definition & standard: Steels for bearing rings and rolling elements per EN ISO 683-17.
- Function in bearings: Used where balls or rollers separate the moving parts of the bearing to minimize friction.
- Performance requirements: Strict specifications for hardness, hardenability, microstructure, cleanliness, and surface finish.
- Operating conditions: Designed to withstand high contact pressures and alternating loads during service.
Typical applications:
- Ball bearings
- Needle bearings
- Roller bearings
- Cams
Samples from our Portfolio
DIN EN 10277 and DIN EN 10278
Material no.
1.3505
Name
100Cr6
Material no.
1.3520
Name
100CrMnSi6-4
Material no.
1.3536
Name
100CrMo7-3
Material no.
1.3537
Name
100CrMo7-3
Material no.
1.3539
Name
100CrMnMoSi8-4-6
Material no.
1.3533
Name
18NiCrMo14-6
Material no.
1.6587
Name
18CrNiMo7-6
Material no.
1.1219
Name
C56E2
Material no.
1.1244
Name
70Mn4
Your contact for rolling bearing steel
We manufacture all our products to customer specifications. So what are your specifications?
Please feel free to contact us. Together we will find your perfectly customized solution.
Marco Altenhöfer
Sales Director Peeled Bars & CNC
Microalloyed AFP Steel
- Definition & standard: Precipitation-hardening ferritic–pearlitic steels per EN 10267, used from the hot-forming condition.
- Property setting: Mechanical properties are achieved by controlled cooling from the hot-forming temperature, a ferritic–pearlitic microstructure (optionally with small fractions of bainite and/or martensite), and precipitation hardening.
- Process advantage: No heat treatment is required after hot forming, reducing processing costs and minimizing component distortion.
Typical applications:
- Connecting rods
- Pistons
- Injection systems
- Crankshafts
- Trailer couplings / ball bars
Samples from our Portfolio
DIN EN 10277 and DIN EN 10278
Material no.
1.0603
Name
C70S6 /C67
Material no.
1.1197
Name
25MnV5
Material no.
1.1199
Name
49MnVS3
Material no.
1.1243
Name
70MnVS4 / 75Mn4
Material no.
1.1304
Name
46MnVS6
Material no.
1.5217
Name
20MnV6
Material no.
1.5231
Name
38MnSiVS5
Material no.
1.5232
Name
27MnSiVS6
Your contact for microalloyed AFP steel
We manufacture all our products to customer specifications. So what are your specifications?
Please feel free to contact us. Together we will find your perfectly customized solution.
Marco Altenhöfer
Sales Director Peeled Bars & CNC
Bright Steel from GMH Gruppe: Properties and Applications
Bright steel from GMH Gruppe stands for maximum dimensional accuracy, surface quality, and flexibility in downstream processing.
- Tight tolerances — production up to tolerance zone h6 for the highest precision and fit.
- Tailored heat treatments — e.g. quenched and tempered (+QT), +AC, +FP, matched to the required strengths and microstructural properties.
- Diverse machining options — sawing, chamfering, centering, turning, milling, deep drilling, and CNC production with integrated length and weight control.
- Comprehensive defect inspection — identity testing, surface crack detection, and ultrasonic testing (phased-array technology) for maximum quality assurance.
This enables us to offer bright steel that meets even extreme requirements in automotive, mechanical engineering, energy, and mobility applications.
Engineered for high loads and tight tolerances, these bright-steel products serve as core materials across many sectors:
- Automotive — for steering systems, engine and transmission parts, drive shafts, crankshafts, and camshafts.
- Mechanical and plant engineering — for high-strength fasteners, shafts, piston rods, and precision parts.
- Rail and ship technology — for safety-relevant components such as axles, couplings, and fasteners.
- Power generation — in fossil and renewable plants, e.g. for turbine shafts, anchor bolts for wind turbines, generator components, and high-pressure parts.
Thanks to tight tolerances, customized machining, and certified quality, our bright steel meets the most demanding service conditions.
Further processing possibilities
Heat treatment
Treated for special mechanical strength
(+TH)
Soft annealed
(+A)
Stress-relieving annealed
(+SR)
Ferrite-pearlite annealing
(+FP)
Normalising annealed
(+N)
Quenched and tempered (water or air hardening)
(+QT)
Treated for shearability
(+S)
Spheroidising annealed
(+AC)
Treated for sawability
(SAW)
Mechanical processing options
Sawing
Bevelling
Centering
Turning
Milling
Abrasive cutting
Chamfering
Deburring
Option for special designs
Grinding
Surface treatment
Chrome plating
Hardening
Test procedures
Ultrasonic testing
Surface crack detection
Identity check
What you can expect
Raw material recycling
We use almost 100 % scrap in our low-CO2-emission steel production, thereby enabling closed loops
High vertical integration
We offer bright steel with added value from a single source
Flexibility
We offer short-term availability of bright steel of various grades as well as special analyses
Precisely calculate the weight of your steel
With our steel weight calculator, you can work out the weight of your desired product in just a few mouse clicks.
