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17NiCrMoS6-4 (1.6569) Forged Parts | EN 10084 China Forging Manufacturer for EU & Germany Market
Last updated: | Reviewed by Technical Engineering Team17NiCrMoS6-4 (1.6569) open die forged parts and seamless rolled rings — Jiangsu Liangyi, ISO 9001 certified, EN 10084 compliant
Established in , Jiangsu Liangyi Co.,Limited is an ISO 9001:2015 certified professional China manufacturer and supplier of 17NiCrMoS6-4 (1.6569) open die forging parts and seamless rolled steel forged rings. Our factory covers 80,000㎡ and has 120,000 tons annual capacity.We have advanced forging & inspection equipment, and we can supply custom EN-compliant 1.6569 forged parts to Germany, France, Italy, Spain, Netherlands, and all 27 EU member states.
Ni-Cr-Mo Case Hardening Steel with Controlled Sulfur
Melting Process
EF + LF + VD Triple Premium Melting
Weight Range
30 – 30,000 KGS
Max Ring Ø
5,000 mm
Max Shaft Length
12,000 mm
Surface Hardness
58–62 HRC (Carburized)
Tensile Strength
≥1,080 MPa
Yield Strength
≥785 MPa
Delivery
Standard 20–35 days | Expedited 15 days
Certification
ISO 9001:2015 | EN 10084 Compliant | EN 10204 3.1/3.2 MTC
What is 17NiCrMoS6-4 (1.6569) Case Hardening Steel?
17NiCrMoS6-4 (material number 1.6569, per EN 10084:2008) is a case hardening steel, and it is made of premium nickel-chromium-molybdenum with controlled sulfur content (0.02–0.04% S) for improved machinability. It has excellent surface wear resistance (58–62 HRC after carburization) and superior core toughness (30–40 HRC), so that it is the best choice material for heavy-duty gear transmission parts in European industrial applications.
17NiCrMoS6-4 (designated as 1.6569 under European EN standard) is a premium high-toughness case hardening steel. It has excellent surface wear resistance and core toughness after carburization heat treatment. We supply multiple variants of 1.6569 steel that meet ultra-high cleanliness requirements. and it is the best choice material for heavy-duty applications where the high fatigue strength, impact resistance, and long lifetime are needed under extreme alternating loads.
17NiCrMoS6-4 vs 18CrNiMo7-6 — Detailed Comparison
Compared to 18CrNiMo7-6 (1.6587), 17NiCrMoS6-4 has 30% higher core toughness, great hardenability for large-section parts, more consistent carburization performance, better machinability due to controlled sulfur, and improved dimensional stability after heat treatment.
Compared to industry-standard case hardening steels like 18CrNiMo7-6, 17NiCrMoS6-4 has 30% higher core toughness, great hardenability for large-section parts, more consistent carburization performance, and better dimensional stability after heat treatment. So that it is the best choice material for high-load transmission parts in EU industrial applications. Explore our full range of forging steel materials for your project needs.
17NiCrMoS6-4 (1.6569) vs 18CrNiMo7-6 (1.6587) Technical Comparison
Parameter
17NiCrMoS6-4 (1.6569)
18CrNiMo7-6 (1.6587)
EN Standard
EN 10084:2008
EN 10084:2008
Core Toughness
30% Higher ✓
Standard
Controlled Sulfur (S)
0.02–0.04% ✓
Max 0.035%
Machinability
Superior ✓
Good
Hardenability (Large Section)
Excellent
Very Good
Carburization Uniformity
More Uniform
Standard
Dimensional Stability
Better
Good
Surface Hardness
58–62 HRC
58–62 HRC
Typical Application
Wind gear, mining, oil & gas
Wind gear, general transmission
Full Range of 17NiCrMoS6-4 (1.6569) Forged Products
We produce custom 17NiCrMoS6-4 (1.6569) forged products with weight ranges from 30 KGS to 30,000 KGS, including forged bars, seamless rolled rings (up to Ø5000mm), gear shafts (up to 12,000mm length), sleeves, discs and other products.They all fully meet EN 10084 and your technical drawings.
Forged Bars & Rods
17NiCrMoS6-4 forged round bars, square bars, flat bars, rectangular bars and rods, they are strictly controlled in dimensions and used for industrial transmission parts.
Seamless Rolled Rings
1.6569 seamless rolled rings, forged flanges, riding gear rings, slewing bearing races, they are made with advanced rolling technology for superior structural integrity.
Forged Shafts & Gear Components
17NiCrMoS6-4 forged gear shafts, pinion shafts, spindles, gear wheels, crankshafts, eccentric shafts are used for heavy-duty transmission systems.
Forged Sleeves & Casings
1.6569 forged hubs, housings, shells, sleeves, bushes, casings, hollow bars, pipe tubes and barrels are used for various industrial equipment.
Forged Discs & Plates
17NiCrMoS6-4 forged discs, disks, blocks and plates, they are custom forged based on clients requirements for specific thickness and dimensions.
Production Standards & Premium Melting Process
All 17NiCrMoS6-4 forgings are made based on EN 10084:2008 . In order to get ultra-high steel cleanliness, they are produced by a premium EF+LF+VD triple melting process ,and all of the parts meet EN 10204 3.1/3.2 MTC.
EN 10084: 2008 — Case hardening steels. Technical delivery conditions
EN 10277-4: 2008 — Bright steel products. Case hardening steels
EN 10204 — Metallic products. Types of inspection documents
EN 10228 — Non-destructive testing of steel forgings
To make sure all products have the highest steel cleanliness and consistent material performance, we apply a premium three-step melting process: EF + LF + VD. All of them meet EN 10204 3.1/3.2 mill test certificates.
Chemical Composition of 17NiCrMoS6-4 (1.6569) Steel
17NiCrMoS6-4 contains C 0.14–0.20%, Ni 1.20–1.50%, Cr 0.80–1.10%, Mo 0.80–1.10%.In order to improve its machinability, we control the sulfur at 0.02–0.04% ,all of them meet EN 10084:2008.
Chemical Composition per EN 10084:2008 (Weight %)
Element
Range (wt%)
Carbon (C)
0.14 – 0.20
Silicon (Si)
Max 0.40
Manganese (Mn)
0.60 – 0.90
Nickel (Ni)
1.20 – 1.50
Phosphorus (P)
Max 0.025
Sulfur (S)
0.02 – 0.04
Chromium (Cr)
0.80 – 1.10
Molybdenum (Mo)
0.80 – 1.10
Precision Heat Treatment Process for 17NiCrMoS6-4 (1.6569) Forgings
Our 17NiCrMoS6-4 forgings are processed by carburization at 880–980°C, followed by direct or double hardening with oil and polymer quenching, and low-temperature tempering at 150–200°C. So that they will have surface hardness of 58–62 HRC and core hardness of 30–40 HRC.
We have a fully controlled precision heat treatment process in our more than 10 dedicated heat treatment furnaces:
Carburization: 880 – 980 °C, Air Cooling
Direct Hardening: 810 – 850 °C, Oil/Polymer/Warm Bath Quenching
Double Hardening: 830 – 870 °C (Core) + 780 – 820 °C (Case), Oil/Polymer Quenching
Tempering: 150 – 200 °C (Min. 1 Hour Hold), Air Cooling
Sub-zero Treatment: Optional, for enhanced dimensional stability
Stress Relieving: Available for precision machined components
Mechanical Properties of 17NiCrMoS6-4 (1.6569) Forged Parts
After heat treatment, 17NiCrMoS6-4 forgings get yield strength ≥785 MPa, tensile strength ≥1080 MPa, elongation ≥35%, and impact toughness ≥40 J at 20°C.
Mechanical Properties — Minimum Guaranteed Values After Heat Treatment
Property
Min. Value
Yield Strength (Rp0.2)
785 MPa
Tensile Strength (Rm)
1080 MPa
Elongation (A5)
35%
Reduction of Area (Z)
40%
Impact Toughness (KV at 20°C)
40 J
Surface Hardness (Carburized)
58 – 62 HRC
Core Hardness
30 – 40 HRC
Full Production Process & Strict Quality Control
Complete 14-Step Production Flow
Raw Material Steel Ingot Warehousing (Full Chemical Pre-inspection)
Precision Cutting to Custom Specifications
Controlled Heating (Real-time Temperature Monitoring)
Open Die Forging / Seamless Ring Rolling (2000T–6300T Presses)
Post-forging Heat Treatment (Full Process Control)
Final Inspection and Shipment (With EN 10204 3.1/3.2 MTC)
Mill Test Certificate (MTC) Contents
Heat Number and Melting Type Details
Full Dimensional Test Results
Complete Heat Treatment Cycle Details
Full Chemical Analysis (Including Tramp Elements)
All Mechanical Test Results
Hardness Test Results
UT and MT Results
Surface Crack Examination
Visual Inspection Confirmation
Additional Tests per Drawing/Order
Industrial Applications & EU Market Case Studies
17NiCrMoS6-4 forgings are used in wind power gearboxes, cement & mining equipment, oil & gas offshore engineering, rail transit, and industrial transmission systems across the EU. Jiangsu Liangyi has supplied forgings to leading German, French, Italian and Spanish industrial OEMs for over 8 years.All of the products meet EN 10084.
Our 17NiCrMoS6-4 (1.6569) forged parts are used in different heavy industrial conditions across the EU and markets around the world, with proven project references:
Wind Power Industry (EU Market)
17NiCrMoS6-4 (1.6569) is the best choice material for high-precision transmission parts in wind turbine gearboxes. We have supplied forged gear shafts, ring gears and pinion shafts to a leading German wind turbine manufacturer for over 8 years. After case hardening, our 1.6569 forged parts have excellent surface wear resistance, high core toughness and stable fatigue resistance under extreme alternating loads.And they all meet EN 10084 .
We supply heavy-duty 17NiCrMoS6-4 forged parts for cement mills and mining equipment, including case hardened pinion shafts for French cement plant rotary kilns, eccentric shafts for gyratory crushers in Spanish mining projects, slewing bearing races for mining excavators, and belt pulley wheels for crusher systems. Our 1.6569 forgings meet strict requirements of high torque, strong impact resistance and long lifetime.
Our 17NiCrMoS6-4 forged parts are used in onshore and offshore oil and gas equipment: gear shafts for drilling rig mud pumps, subsea riser joints, anchor winch stub shafts for North Sea offshore platforms, and wellhead parts. They are made with high-cleanliness EF+LF+VD steel, and fully meet European offshore safety standards.
We produce 1.6569 forged transmission shafts for German railway locomotives, traction motor end housings, crane wheels, crankshafts for mechanical presses and gas compressors, and hydraulic cylinder parts. The 17NiCrMoS6-4 steel has high surface hardness and excellent core toughness for frequent load changes and heavy-duty conditions, and they are widely recognized by European rail equipment manufacturers.
Industrial Transmission & General Machinery
Our 17NiCrMoS6-4 forged gear wheels, pinion shafts, gear couplings, seamless rolled rings and trunnion wheels are used in gearboxes, speed reducers, sugar mills, rotary dryers, granulators and FGD equipment across Italy, Poland and other EU countries. With strictly controlled dimensions and stable mechanical properties, our 1.6569 forged parts meet diverse European industrial requirements.
Why Choose Jiangsu Liangyi as Your 17NiCrMoS6-4 Forging Partner?
More than 25 years of EN standard forging experience | ISO 9001:2015 certified | 80,000㎡ facility, 120,000 tons annual capacity | 2000T–6300T hydraulic presses | Fast delivery to Hamburg, Rotterdam, Antwerp, Le Havre | more than 50 countries served globally.
Professional EN Standard Expertise
Over 25 years of experience in European standard case hardening steel forgings, we fully understand the material properties of 17NiCrMoS6-4 (1.6569) and the strict EU industrial requirements.
Full Customization Capability
We provide one-stop custom forging services from raw material melting to finish machining, and also support custom sizes, shapes and technical requirements per your drawings.
Strict Full-Process Quality Control
100% quality control from raw material inspection to final shipment, with complete NDT and performance testing, making sure every batch meets EN standards.
Advanced Equipment
2000T–6300T hydraulic forging presses, 1M–5M seamless rolling machines, more than 10 heat treatment furnaces, and professional NDT, chemical analysis and mechanical testing equipment.
EU Market Friendly Service
Fast delivery to major European ports (Hamburg, Rotterdam, Antwerp, Le Havre), EUR payment is accepted, and professional English technical support is available.
Global Proven Experience
We provide high-quality forged parts to more than 50 countries, with extensive EU market experience. We understand well the international trade rules and product certification requirements.
Frequently Asked Questions
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17NiCrMoS6-4 (1.6569) is mainly used for heavy-duty transmission parts that need high surface wear resistance and core toughness, such as gear shafts, pinion shafts, gear wheels, crankshafts, seamless rolled rings for wind turbine gearboxes, cement mills, mining equipment, rail transit, oil and gas engineering and other heavy industrial conditions.
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17NiCrMoS6-4 steel is standardized under EN 10084: 2008 (Case hardening steels) and EN 10277-4: 2008 (Bright steel products — Case hardening steels), with the official material number 1.6569.
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We produce 17NiCrMoS6-4 forged parts with weight ranges from 30KGS to 30,000KGS. Seamless rolled rings are up to Ø5000mm; forged shafts are up to 12,000mm in length.
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Yes, all products include EN 10204 3.1 MTC as standard. 3.2 MTC with third-party inspection (BV, SGS, TUV) is also available upon request.
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Standard delivery time is 20–35 days . The actual delivery time depends on clients drawings, size and quantity. And we can speed up the production for urgent orders ,with delivery time as short as 15 days.
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Yes, we support both one piece sample orders and large volume mass production orders. The minimum order weight is 30KGS.
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Yes, we provide a full range of service from forging to finish machining and CNC machining with tolerance up to IT6 level for every part.
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Shot blasting, sand blasting, blackening, phosphating, galvanizing, painting, anti-rust oil coating and other treatments are available , which can meet different application requirements.
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T/T (30% deposit, 70% before shipment), irrevocable L/C at sight, and OA for long-term customers. We accept EUR, USD and other major currencies.
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Yes, inspection by TUV, SGS, BV, Lloyd’s Register are available per request. Full dimensional, chemical, mechanical and UT/MT NDT testing are also available.
Contact Us for Custom 17NiCrMoS6-4 (1.6569) Forging Quotation
We provide 17NiCrMoS6-4 (1.6569) forged steel products with competitive price and great quality for all customers around the world, especially for the European Union market. Send your drawing, material requirement and quantity for a free quotation.
