35NCD16 DIN 1.6773 36NiCrMo16 QT Steel

1.6773 High-Strength Nickel-Chromium-Molybdenum Steel (36NiCrMo16)

Product Description

FUSHUN METAL’s 1.6773 (36NiCrMo16) is a premium high-nickel, chromium-molybdenum alloyed quenching and tempering steel offering an exceptional combination of ultra-high strength, excellent toughness, and superior hardenability. With a carefully engineered chemical composition featuring optimized levels of nickel (3.60-4.10%), chromium (1.60-2.00%), and molybdenum (0.25-0.45%), our 1.6773 delivers outstanding performance in the most demanding applications requiring superior mechanical properties throughout large cross-sections. This versatile steel is specifically developed for heavily loaded components in mechanical engineering, aerospace, defense, and high-performance automotive applications where exceptional strength combined with good toughness is essential. Available in round bars, flat bars, plates, and forgings, FUSHUN METAL’s 1.6773 steel provides consistent quality and reliable performance for the most critical engineering applications requiring superior mechanical properties even in large dimensions.

Material Designations and Standards

1.6773 (36NiCrMo16) conforms to the following standards:

Standard	Designation
EN 10083-3	1.6773 / 36NiCrMo16
Italy / UNI	34NiCrMo16
Germany / DIN	36NiCrMo16
France / AFNOR	35NCD16
UK / BS	835M30
China / GB	–
Russia / GOST	–
USA / AISI/SAE	–

Chemical Composition

FUSHUN METAL’s 1.6773 (36NiCrMo16) Steel features the following chemical composition according to EN 10083-3:2006 standard:

Element	Content (%)	Allowed Product Deviations
Carbon (C)	0.32 – 0.39	±0.02
Silicon (Si)	max. 0.40	+0.03
Manganese (Mn)	0.50 – 0.80	±0.04
Phosphorus (P)	max. 0.025	+0.005
Sulfur (S)	max. 0.025	+0.005
Chromium (Cr)	1.60 – 2.00	±0.05
Molybdenum (Mo)	0.25 – 0.45	±0.04
Nickel (Ni)	3.60 – 4.10	±0.07
Iron (Fe)	Balance	–

Key Element Functions

• Nickel (3.60-4.10%): High nickel content significantly improves hardenability and toughness, especially at low temperatures. Contributes to excellent deep hardenability in large sections.
• Carbon (0.32-0.39%): Provides optimum balance between hardness and toughness after heat treatment, enabling high strength while maintaining good ductility.
• Chromium (1.60-2.00%): Enhances hardenability, improves wear resistance, and contributes to overall strength and corrosion resistance.
• Molybdenum (0.25-0.45%): Improves hardenability, prevents temper brittleness, and enhances high-temperature strength and creep resistance.
• Manganese (0.50-0.80%): Increases hardenability and contributes to overall strength and wear resistance.
• Silicon (max 0.40%): Acts as a deoxidizer during steelmaking and contributes to strength.

Heat Treatment Parameters

FUSHUN METAL’s 1.6773 (36NiCrMo16) can be supplied with various heat treatments according to customer requirements:

Process	Temperature (°C)	Cooling Medium / Notes
Hot-forming	1100-900	–
Normalizing (+N)	850	Air
Quenching (+Q)	880	Air
Quenching (+Q)	830-860	Oil, polymer, water or salt bath (500°C)
Tempering (+T)	550-650	Air
Stress-relieving (+SR)	50° under the temperature of tempering	–
Soft annealing (+A)	650	Air (HB max 269)
Isothermal annealing (+I)	790	Furnace cooling (HB max 275)
Full annealing	825	Water
Pre-heating welding	250	–
Stress-relieving after welding	550	Furnace cooling

Critical Temperatures

AC1 (°C)	AC3 (°C)	MS (°C)	Mf (°C)
700	760	240	30

Available Product Forms and Dimensions

FUSHUN METAL offers 1.6773 (36NiCrMo16) Steel in a wide range of forms to meet diverse application requirements:

Round Bar Specifications

Diameter (mm)	Standard Length (mm)	Surface Condition
8 – 250	3000, 6000, Fixed or Random	Black, Peeled, Turned, Ground

Flat Bar Specifications

Thickness (mm)	Width (mm)	Standard Length (mm)	Surface Condition
8 – 160	20 – 300	3000, 6000, Fixed or Random	Hot Rolled, Cold Drawn, Ground

Plate Specifications

Thickness (mm)	Width (mm)	Length (mm)	Surface Condition
8 – 100	Up to 2000	Up to 6000	Hot Rolled, Pickled, Ground

Forged Components

Diameter/Thickness (mm)	Weight Range	Surface Condition
Up to 990	Up to 5000 kg	Black, Rough Machined, Proof Machined

Mechanical Properties

1.6773 (36NiCrMo16) offers the following mechanical properties in quenched and tempered condition according to EN 10083-3:2006:

Hot-Rolled Mechanical Properties (Quenched and Tempered Condition)

Size Range (mm)	Tensile Strength (N/mm²)	Yield Strength (N/mm²) min.	Elongation A (%) min.	Reduction of Area Z (%) min.	Impact Energy Kv (J) min.	Hardness (HBW) for information
d ≤ 16 / t ≤ 8	1250-1450	1050	9	40	–	370-415
16 < d ≤ 40 / 8 < t ≤ 20	1250-1450	1050	9	40	30	370-415
40 < d ≤ 100 / 20 < t ≤ 60	1100-1300	900	10	45	35	331-380
100 < d ≤ 160 / 60 < t ≤ 100	1000-1200	800	11	50	45	298-359
160 < d ≤ 250 / 100 < t ≤ 160	1000-1200	800	11	50	45	298-359

d = diameter, t = thickness

Forged Quenched and Tempered Properties (UNI EN 10250-3:2001)

Size Range (mm)	Tensile Strength (N/mm²) min.	Yield Strength (N/mm²) min.	Elongation A (%) min. (L)	Elongation A (%) min. (T)	Impact Energy Kv (J) min. (L)	Impact Energy Kv (J) min. (T)	Hardness (HBW) min.
d ≤ 250 / t ≤ 160	1000	800	11	8	45	22	298
250 < d ≤ 500 / 160 < t ≤ 330	1000	800	11	8	45	22	298
500 < d ≤ 990 / 330 < t ≤ 660	1000	800	11	8	45	22	298

L = longitudinal, T = tangential, d = diameter, t = thickness

Tempering Values (10mm Round Bar, Quenched at 850°C in Oil)

Tempering Temperature (°C)	200	250	300	350	400	450	500	550	600	650
Hardness (HB)	518	496	468	448	432	409	385	357	327	301
Hardness (HRC)	52.5	51	49	47.5	46	44	41.5	38.5	35	32
Tensile Strength (N/mm²)	1900	1820	1720	1610	1520	1420	1320	1200	1090	1000
Yield Strength (N/mm²)	1550	1500	1430	1360	1290	1200	1100	990	900	870
Elongation A (%)	7.0	8.0	8.6	9.2	9.6	10.0	11.0	12.4	14.0	14.0
Reduction of Area Z (%)	23	24	25	27	27	28	32	38	48	50
Impact Energy Kv (J)	28	28	27	26	26	26	28	38	64	64

Hardenability

1.6773 (36NiCrMo16) features excellent deep hardenability, making it suitable for large section components requiring uniform mechanical properties throughout the cross-section.

Jominy Test Results (EN 10083-3:2006, HRC, Grain Size 5 min.)

Distance from Quenched End (mm)	1.5	3	5	7	9	11	13	15	20	25	30	35	40	45	50	H
Minimum HRC	50	49	48	48	48	48	47	47	47	47	47	47	47	47	47	–
Maximum HRC	57	56	56	56	56	56	55	55	55	55	55	55	55	55	55	–

Large Section Performance (Lucefin Experience)

Forged round 300 mm quenched at 870°C in water, tempered 590°C air

Depth from Surface	Tensile Strength (N/mm²)	Yield Strength (N/mm²)	Elongation A (%)	Reduction of Area Z (%)	Impact Energy Kv +20°C (J)	Impact Energy Kv -20°C (J)	Hardness (HB)
½ radius	1201	1110	12.8	55.0	90-98-90	62-58-60	371

Chemical Composition of Tested Forging

C%	Si%	Mn%	P%	S%	Cr%	Mo%	Ni%
0.34	0.25	0.50	0.012	0.005	1.68	0.40	3.70

Physical Properties

1.6773 (36NiCrMo16) offers the following physical properties:

Temperature-Dependent Properties

Property	Units	20°C	100°C	200°C	300°C	400°C	500°C	600°C
Thermal Expansion Coefficient	10⁻⁶·K⁻¹	–	11.5*	12.3*	12.8*	13.3*	13.7*	14.0*

* Values indicate thermal expansion coefficient between 20°C and the indicated temperature

Constant Physical Properties

Property	Units	Value
Modulus of Elasticity (longitudinal)	GPa	208
Modulus of Elasticity (tangential)	GPa	80
Specific Heat Capacity	J/(kg·K)	460
Thermal Conductivity	W/(m·K)	33
Density	kg/dm³	7.84
Specific Electric Resistance	Ohm·mm²/m	0.30
Electrical Conductivity	Siemens·m/mm²	3.33

Main Applications

1.6773 (36NiCrMo16) is specifically designed for applications requiring exceptional strength combined with good toughness, particularly in large cross-sections:

• Aerospace and Defense: Landing gear components, structural parts, high-stress aerospace components
• Automotive Industry: High-performance racing components, heavy-duty axles, transmission shafts, connecting rods
• Heavy Machinery: Large shafts, gears, and rollers for mining and construction equipment
• Energy Sector: Critical components for power generation, turbine shafts, critical fasteners
• Oil and Gas: High-pressure components, drilling equipment, large diameter connectors
• Marine Applications: Heavy-duty propeller shafts, large marine components
• Tool and Die: Large die-holders, press tooling, and forming tools
• Industrial Equipment: High-stress machine components, industrial gears, large bearings
• Railway Industry: Critical components for rolling stock and infrastructure

Machining Recommendations

To achieve optimal results when machining 1.6773 (36NiCrMo16) steel, FUSHUN METAL recommends the following parameters:

Annealed Condition (≤ 275 HB)

Operation	Tool Material	Cutting Speed	Feed Rate	Coolant
Turning	Cemented Carbide P20-P30	100-130 m/min	0.2-0.4 mm/rev	Yes
Turning	High Speed Steel	15-25 m/min	0.1-0.3 mm/rev	Yes
Milling	Cemented Carbide P20-P40	90-120 m/min	0.1-0.3 mm/tooth	Yes
Drilling	High Speed Steel	15-20 m/min	0.05-0.15 mm/rev	Yes
Grinding	Aluminum Oxide Wheel	25-30 m/sec	–	Yes

Quenched and Tempered Condition (300-415 HB)

Operation	Tool Material	Cutting Speed	Feed Rate	Coolant
Turning	Cemented Carbide P10-P20	60-80 m/min	0.1-0.2 mm/rev	Yes
Milling	Cemented Carbide P10-P20	50-70 m/min	0.05-0.15 mm/tooth	Yes
Drilling	Cemented Carbide	40-60 m/min	0.05-0.12 mm/rev	Yes
Grinding	Aluminum Oxide Wheel	25-30 m/sec	–	Yes

Welding Recommendations

Welding of 1.6773 (36NiCrMo16) requires special precautions due to its high alloy content:

• Preheat: 250°C as indicated in the technical data
• Post-weld Heat Treatment: Essential – 550°C with furnace cooling
• Filler Materials: Matching composition or low-hydrogen electrodes
• Processes: TIG/GTAW preferred for precision
• Hydrogen Control: Use low hydrogen processes and consumables
• Cooling Rate: Control cooling rate to avoid cracking
• Limitations: Generally not recommended for structural welding; best suited for repair welding
• Quality Control: Non-destructive testing after welding is recommended

Comparative Advantages

Understanding how 1.6773 (36NiCrMo16) compares to other grades helps in selecting the optimal material for your application:

Property	1.6773 (36NiCrMo16)	1.6580 (30CrNiMo8)	1.7225 (42CrMo4)
Nickel Content	3.60-4.10%	1.80-2.20%	None
Strength Level	Ultra High	Very High	High
Hardenability	Superior	Excellent	Good
Large Section Capability	Excellent	Very Good	Moderate
Low Temperature Toughness	Excellent	Very Good	Good
Fatigue Resistance	Excellent	Very Good	Good
Cost	High	Medium-High	Medium
Typical Applications	Aerospace, large critical components, high-stress applications	Heavy machinery, automotive components	General engineering, moderate stress applications

Advantages of 1.6773 (36NiCrMo16)

1.6773 (36NiCrMo16) offers several key advantages that make it an excellent choice for demanding applications:

• Exceptional Strength-to-Toughness Ratio: The combination of high strength (up to 1450 MPa) with good toughness makes this steel ideal for critical components.
• Superior Deep Hardenability: The high nickel content ensures excellent hardenability even in large cross-sections, maintaining consistent mechanical properties throughout.
• Excellent Fatigue Resistance: Superior performance under cyclic loading conditions, especially for large components.
• Good Low-Temperature Toughness: Maintains good impact properties at low temperatures due to high nickel content.
• Dimensional Stability: Minimal distortion during heat treatment due to balanced alloy content.
• Consistent Properties in Large Sections: Demonstrated ability to maintain high mechanical properties even in large diameter forgings (as shown in testing data for 300mm round).
• Corrosion Resistance: Better than standard alloy steels due to chromium and nickel content.

Quality Assurance

FUSHUN METAL maintains the highest quality standards for 1.6773 (36NiCrMo16) Steel:

• Material Certificates: EN 10204/3.1 certificates provided with chemical analysis and mechanical properties
• Testing: Comprehensive testing including ultrasonic testing, grain size verification, and mechanical property testing
• Hardenability Control: Jominy end-quench testing to verify hardenability according to EN 10083-3:2006
• Microstructure Analysis: Verification of proper microstructure and grain size (min. grain size 5)
• Quality Management: ISO 9001 certified production processes
• Traceability: Full traceability from raw material to finished product
• Non-Destructive Testing: Ultrasonic examination according to industry standards

Why Choose FUSHUN METAL for 1.6773 (36NiCrMo16) Steel

When you select FUSHUN METAL as your supplier for 1.6773 (36NiCrMo16) Steel, you partner with a leading manufacturer committed to excellence:

• Material Expertise: Specialized experience in manufacturing high-nickel alloy steels for demanding applications
• Advanced Production: State-of-the-art production facilities for consistent quality in complex alloy steels
• Heat Treatment Mastery: Expert capabilities in heat treating large section components for optimal properties
• Technical Support: Expert assistance in material selection and application guidance by experienced metallurgists
• Custom Solutions: Ability to meet specific requirements for dimensions, tolerances, and mechanical properties
• Quality Assurance: Comprehensive testing and inspection to ensure superior performance in critical applications
• Reliable Supply Chain: Dependable sourcing of high-quality raw materials for consistent alloy composition

Request Information

Contact FUSHUN METAL today to discuss your 1.6773 (36NiCrMo16) Steel requirements. Our technical team is ready to assist you with:

• Detailed product specifications
• Technical consultations for your specific application
• Heat treatment recommendations for optimal properties
• Custom dimension and processing requirements
• Large section capabilities and special forgings
• Pricing inquiries and delivery schedules

In the 36NiCrMo16, 35NCD16, 30NCD16, 30NiCrMo16 grades we supply:

List of equivalents and other determinations of 36NiCrMo16 – 1.6773 steel:

6773, 36 NICRMO 16, 35NCD14, 35 NCD 14, 35NICRMO14, 35 NICRMO 14, 34HN3M, 36HNM, 30NCD16, 30 NCD 16, E30NCD16, 35NCD16, 35 NCD 16, AIR 9160/C, 32HN3M, 30NICRMO16-6, 30 NICRMO 16-6, 1.6747, LW 6747, 6747, 36CH2N4MA, 36KH2N4MA, 36H2N4MA, 36Х2Н4МА, 34CHN3M, 34KHN3M, 34ХН3М, ASNA 3133, ASNA 3134, ASNA 3149, ASNA 3181, ASNA 3197, 1.6746, FE-PL75, FDMA, 30NCD16.

 

We also supply :

4130 , 4130 p+x , 4140 , 4330v mod , 4340 , 4145h mod , 4317

1.8509 , 1.6523 , 1.7707 , 1.6657 , 1.6587 , 1.6582 , 1.6773

For all products, please check here: Fushun products