18CrNiMo7-6 Steel Forgings
Custom 18CrNiMo7-6 steel forgings for gears, pinions, shafts and highly loaded transmission components requiring high core strength, toughness and a wear-resistant carburized surface.
- Customer drawings
- Heat treatment
- Inspection reports
Built around the
drawing.
Controlled through
delivery.
Every custom forging begins with a technical review of material, geometry, heat treatment, machining allowance and inspection requirements. The production route is defined before quotation and confirmed against the project specification.
01
Produced to drawings, samples or technical specifications.
02
Forging, heat treatment, machining and inspection.
03
Material, dimensional and test reports supplied.
PRODUCT FORMS
18CrNiMo7-6 Steel Forging Forms
Forged Gear Blanks
Custom gear blanks for heavy-duty gears, pinions, reducers and industrial transmission systems.
Forged Shafts
Drive shafts, pinion shafts and stepped shafts supplied with machining and heat-treatment allowance.
Forged Rings
Forged and rolled rings for ring gears, bearing components, sleeves and rotating machinery.
Forged Blocks
Rectangular and custom forged blocks for machining into highly loaded drivetrain and mechanical components.
Need a different forging geometry? Send your drawing, material standard and required dimensions for production review.
18CrNiMo7-6 Steel Forging Overview
18CrNiMo7-6 is a nickel-chromium-molybdenum case-hardening steel designed for highly loaded components requiring high core strength, toughness and a hard, wear-resistant carburized surface.
The grade is designated as material number 1.6587 and is specified in the EN case-hardening steel system. It is widely used for large gears, pinions, transmission shafts and other components subjected to repeated contact loads and demanding service conditions.
We supply custom 18CrNiMo7-6 steel forgings according to customer drawings and technical specifications. Production requirements are reviewed according to forging dimensions, unit weight, machining allowance, carburizing requirements, testing scope and documentation requirements.
Additional information
| Material Grade | 18CrNiMo7-6 |
|---|---|
| MATERIAL NUMBER | 1.6587 |
| REFERENCE STANDARD | EN 10084, EN ISO 683-3 |
| FORMER DIN DESIGNATION | 17CrNiMo6 |
| Steel Type | Nickel-Chromium-Molybdenum Case-Hardening Steel |
| Forging Process | Open Die Forging, Ring Rolling |
| Product Forms | Gear Blanks, Forged Shafts, Forged Rings, Forged Blocks |
| Supply Condition | As Forged, Soft Annealed, Normalized, Carburized and Hardened as Specified |
| Machining Condition | As Forged, Rough Machined, Pre-machined |
| Testing Available | Chemical Analysis, Mechanical Testing, Ultrasonic Testing, Magnetic Particle Testing, Dimensional Inspection |
| Production Basis | Customer Drawing, EN Standard, Customer Specification |
MATERIAL DATA
18CrNiMo7-6 Steel Forging Technical Data
The following values provide a general reference for 18CrNiMo7-6 steel. Final chemical composition, mechanical properties, heat-treatment condition and inspection requirements must follow the agreed material standard and customer specification.
Chemical Composition
| Element | Carbon, C | Manganese, Mn | Silicon, Si | Chromium, Cr | Nickel, Ni | Molybdenum, Mo | Phosphorus, P | Sulfur, S |
|---|---|---|---|---|---|---|---|---|
|
18CrNiMo7-6 |
0.15–0.21 |
0.50–0.90 |
0.15–0.40 |
1.50–1.80 |
1.40–1.70 |
0.25–0.35 |
0.025% max. |
0.035 max. |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Brinell Hardness |
|---|---|---|---|---|
|
Typical +QT Reference, Small Section |
≥780 MPa |
1080–1320 MPa |
≥8% |
Per Specification |
|
Soft-Annealed Reference |
– |
– |
– |
≤229 HB |
The values above are general references and are not guaranteed production limits. Achievable properties depend on forging size, reduction ratio, heat-treatment route, carburizing depth and test location. Required surface hardness, effective case depth and core properties should be stated on the drawing or purchase specification.
Applications of 18CrNiMo7-6 Steel Forgings
18CrNiMo7-6 steel forgings are commonly selected for highly loaded drivetrain components requiring high fatigue strength, a tough supporting core and a wear-resistant carburized surface.
Industrial Gears and Pinions
Large gears, pinions, ring gears and gear blanks for reducers and heavy-duty transmission systems.
Gearbox and Drive Shafts
Pinion shafts, transmission shafts and drive components subjected to repeated torque and contact loads.
Wind Power Components
Gear and shaft forgings for wind turbine gearboxes and other high-load power transmission assemblies.
Heavy Machinery Components
Highly stressed components for industrial machinery, construction equipment and large mechanical drive systems.
MANUFACTURING SCOPE
FORGING AND PROCESSING CAPABILITIES
Actual dimensional and weight limits are confirmed after drawing review.
01
Manufacturing method
Open die forging
02
Materials
Carbon, alloy & stainless steels
03
Heat Treatment
Normalizing, annealing, Q&T
04
Machining
Rough & finish machining
05
Testing
UT, MT, mechanical & dimensional
06
Production basis
Customer drawings & specifications
From drawing review to delivery
01
Drawing, material, quantity, tolerances and standards.
02
Production route, material, machining allowance and lead time.
03
Coordinate manufacturing stages and required quality records.
04
Reports, export packing and shipment support.
Records that travel
with the forging.
Inspection requirements are defined during quotation—not added as an afterthought. Available documentation is confirmed against the project specification before production.
Material certificates & heat traceability
✓
Dimensional inspection report
✓
Ultrasonic / magnetic particle report
✓
Mechanical properties report
✓
Final documentation package
✓
Related Alloy Steel Forgings
Related products
Have a drawing ready?
Send your drawing, material grade, dimensions, quantity and inspection requirements for manufacturing review.
MATERIALS WE FORGE
Carbon Steel Forgings
Custom carbon steel forgings for shafts, rings, discs, blocks and other heavy-duty industrial components.
Alloy Steel Forgings
High-strength alloy steel forgings for machinery, transmission systems and demanding service conditions.
Tool Steel Forgings
Custom tool steel forgings for dies, molds, industrial tooling and other high-load applications.
Stainless Steel Forgings
Corrosion-resistant forged components produced according to customer drawings and specifications.