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 17NiCrMo6-4 N 1.6566 stee Alloy Steel is a low carbon case hardening steel which has at least 0.8Cr%,1.2%Ni and 0.15%Mo. It is the most common case hardening steel and has a medium-high hardenability and good machinability. After case hardening and hardening treatments, the surface reaches an elevated hardness.

17NiCrMo6-4 N 1.6566 stee , 1.6566 Chemical, 1.6566 Properties from steelmaking, ESR, blooming,hot forging & rolling, Heat treatment, Straightened, ultrasonic test, cold working, machined. We also possess advanced precision machining equipments for further processing. Material specification - DIN EN 10084 (1998), DIN 17210 (1986) TECHNICAL SPECIFICATION DATASHEET - W-Nr 1.6566
MATERIAL CATEGORY: Carburizing structural steel
PRODUCT DESCRIPTION Proven performance in long-term service.
Extensive database of long term, high temperature test results.
High room and elevated temperature strength.Good creep.High notch tolerance.Thermal expansion coefficients compatible with low alloy steel turbine casing materials.Lower design and operating risks
Simplified design for bolting configuration compared with martensitic steels or high nickel alloys.Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose.Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - heat treatment / QT
MATERIAL SPECIFICATIONS
DIN EN 10084 (1998), DIN 17210 (1986)

17NiCrMo6-4 Alloy Steel| DIN 1.6566
17NiCrMo6-4 Alloy Steel China supplier and stockholders. OTAI Special steel is 17NiCrMo6-4 Alloy Steel| DIN 1.6566 china supplier of in round bar, plate, flat bar, sheet, square and block.


Chemical Composition of 17NiCrMo6-4 Alloy Steel
Grade C Si Mn Cr Ni Mo P S
17NiCrMo6-4/1.6566 0.14-0.2 ≤ 0.4 0.6-0.9 0.8-1.1 1.2-1.5 0.15-0.25 ≤ 0.025 ≤ 0.035
17NiCrMo6-4 Alloy Steel Relevant Standards
DIN EN UNI AFNOR B.S. AISI/SAE
1.6566 17NiCrMo6-4 18NiCrMo5 18NCD6 817M17 4317
Supply Form & Size & Tolerance
we can supply the round bar, flat bar, plate and square block. round bar can be sawn to your required lengths as one offs or multiple cut pieces. Steel plate and sheet rectangular pieces can be sawn from flat bar, sheet or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Hot rolled bar:Φ6-Φ130mm,Length:3000-10000mm

Hot Forged round bar:Φ130-Φ1000mm,Length:3000-10000mm

Flat bar/Blocks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm

17NiCrMo6-4 Alloy Steel Mechanical Property
Hardening at 850°C, Tempering at 200°C
Size – mm <16 16-40 40-100
Tensile Strength, N/mm² >1200 >1000 >900
Hardness, HB >359 >298 >271
Forging
17NiCrMo6-4 forging temperature:950 – 1200°C, cooled as slowly as possible in the furnace or in the sand after forged.

Heat Treatment
Normalizing: 870 – 890°C, Cooling in air
Soft Annealing:650 – 700°C, Cooling in the furnace
Carburizing:880-980°C
Core-hardening:830-870°C,oil-polymer salt bath
Case-hardening:780-820°C,oil-polymer salt bath
Tempering:150-200°C

Application
17NiCrMo6-4 is used for the production of mechanical parts, which are submitted to wear (gears, camshafts, bushings, pinions)17NiCrMo6-4 is widely used in automotive, chemical/petrochemical, earthmoving / agriculture industry, typical application: boxes, piston bolts, spindles, camshafts, gears, shafts, and other mechanical controlling parts, especially in wheels and stopcock.
　

   AISI 8620 1,6523 | 21NiCrMo2 | SNCM220          20NiCrMo13-4 1.6660     ASTM 52100 | 1,3505 | 100Cr6 | SUJ2 | EN31       33NiCrMoV14-5 1.6956     

   AISI 4340 | 36CrNiMo4 | 1,6511 | EN24 | 817M40 | SNCM439      EN DIN 34CrNiMo6 | 1,6582 | 4337 Engineering Steel    BS EN 42CrMo4 | 1,7225 Alloy Steel  

   1,2379 | X153CrMo12 | SKD11      UNS S31254 1.4547 F44 Super Austenitic Stainless Steel      DIN 1.6657 14NiCrMo13-4 16NCD13 832M13 EN36C

   DIN1.6587 X4317 18CrNiMo7-6 17CrNiMo6 18NCD       DIN 1.6566 17NiCrMo6-4 18NiCrMo5 817M17 SAE4317       DIN 1.6657 14NiCrMo13-4 16NCD13 832M13 EN36C