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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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| Quantity: | |
|---|---|
39NiCrMo3
Country | USA | Europe |
Standard | ASTM A29 | EN10083-3 |
Grade | 9840 | 39NiCrMo3/1.6510 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 39NiCrMo3/1.6510 | 0.35-0.43 | 0.40Max | 0.50-0.80 | 0.025Max | 0.035Max | 0.60-1.00 | 0.15-0.25 | 0.70-1.00 |
3: Mechanical properties .
Mechanical properties for 39NiCrMo3 quenching and tempering alloy steel according to EN10083-3.
Size range | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value At RT/J |
d≤16 t≤8 | 980-1180Mpa | 785Mpa Min | 11% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 930-1130Mpa | 735Mpa Min | 11% Min | 40% Min | 35J Min |
| 40＜d≤100 20＜t≤60 | 880-1080Mpa | 685Mpa Min | 12% Min | 45% Min | 40J Min |
| 100＜d≤160 60＜t≤100 | 830-980Mpa | 635Mpa Min | 12% Min | 50% Min | 40J Min |
| 160＜d≤250 100＜t≤160 | 740-880Mpa | 540Mpa Min | 13% Min | 50% Min | 40J Min |
Sampling and preparation of test pieces for 39NiCrMo3 quenching and tempering steel.
1): According to EN10083-1, all samples shall be taken at a distance of 12.5mm below the heat treated surface
2): As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
| Soft annealed (+A) | HB240Max |
Quenched and tempred (+QT) | HRC28-32(Common Range) |
Where the steel is ordered by using the symbols for normal (+H) or restricted (+HL, +HH) hardenability requirements, the hardenability values should apply below:
Distance in mm from quenched end | ||||||||||||||||
Distance | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |
Hardness In HRC + H | max | 60 | 60 | 59 | 58 | 58 | 57 | 57 | 56 | 55 | 52 | 51 | 49 | 48 | 46 | 45 |
min | 52 | 51 | 50 | 49 | 48 | 46 | 44 | 43 | 39 | 36 | 34 | 33 | 32 | 31 | 30 | |
Hardness In HRC + HH | max | 60 | 60 | 59 | 58 | 58 | 57 | 57 | 56 | 55 | 52 | 51 | 49 | 48 | 46 | 45 |
min | 55 | 54 | 53 | 52 | 51 | 50 | 48 | 47 | 44 | 41 | 40 | 38 | 37 | 36 | 35 | |
Hardness In HRC + HL | max | 57 | 57 | 56 | 55 | 55 | 53 | 53 | 52 | 50 | 47 | 45 | 44 | 43 | 41 | 40 |
min | 52 | 51 | 50 | 49 | 48 | 46 | 44 | 43 | 39 | 36 | 34 | 33 | 32 | 31 | 30 | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ16-Φ300mm | 6000-9000mm |
Hot forged bar | Φ140-Φ800mm | 3000-5800mm |
Hot rolled plate/sheet | T:12-120mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
To ensure optimal performance for your application, we produce 1.6510 high speed tool steel on a dedicated make-to-order basis. This approach guarantees fresh production and allows us to customize the process for your specific requirements. Tell us your needs, and let's get started.
6：Forging processing
Put the 39NiCrMo3 ingot into the furnace and heat to 1150-1200℃
Cooling in the air after forged
7: Heat treatment
Soft annealed:
Heat 39NiCrMo3 steel to 830-860℃ in the furnace
Cooling in the furnace
Normalized:
Heat 39NiCrMo3 steel to 860-900℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 39NiCrMo3 steel to 830-850℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 550-650℃ in the furnace
Take out of 39NiCrMo3 steel from furnace and cool in the air.
Remark: The conditions given above are for guidance, at the temperatures at the lower end of the range are generally applicable to hardening in water and those at the upper end for hardening in oil.
8: Weldability
39NiCrMo3 alloy steel is classified as having challenging weldability due to its chemical composition. With a carbon content typically ranging from 0.35% to 0.43%, it surpasses the 0.25% threshold generally considered the point where weldability begins to deteriorate significantly in steel. Further compounded by significant additions of nickel, chromium, and molybdenum, the material exhibits a high carbon equivalent. This leads to a strong hardening tendency and increased susceptibility to hydrogen-induced cold cracking in the weld metal and heat-affected zone (HAZ).
9：Application
39NiCrMo3 is a quenched and tempered alloy structural steel. Due to its excellent comprehensive mechanical properties, it is widely used in the manufacturing of critical components requiring extremely high strength, toughness, and fatigue resistance. Its primary application areas include:
1. Automotive and Heavy-Duty Vehicles
Powertrain Systems: Used to manufacture critical components such as drive shafts, connecting rods, high-strength gears, and universal joint forks for heavy-duty trucks, buses, and construction machinery.
Engine Components: Used in high-performance or high-power engines for critical parts like crankshafts, camshafts, and valve spring seats
2. Aerospace and Defense Industry
Landing Gear Components: A classic material for manufacturing core load-bearing structures such as aircraft landing gear piston rods and struts, requiring extremely high strength, excellent fracture toughness, and fatigue resistance
Critical Connectors and Shaft Components: Used for manufacturing high-strength bolts, hinge joints, and helicopter rotor shafts in aircraft
3. Machinery Manufacturing and Equipment Industry
Heavy-Duty Shafts and Rotors: Suitable for producing heavy-duty machine tool spindles, turbine and compressor rotor shafts, and large pump shafts
Molds and Tools: Applicable for manufacturing mold bases for large plastic molds and core sleeves for die-casting molds
High-Strength Fasteners: Manufacture high-strength bolts (M20 and above) and studs for critical applications in wind power, mining machinery, and large-scale structural connections
4. Energy and Heavy Engineering
Oil and Gas Equipment: Used in manufacturing drill pipe joints, sucker rods, blowout preventer components, etc.
Wind Power Equipment: Suitable for producing high-load gear components like high-speed shafts and internal gear rings in wind turbine gearboxes
Country | USA | Europe |
Standard | ASTM A29 | EN10083-3 |
Grade | 9840 | 39NiCrMo3/1.6510 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 39NiCrMo3/1.6510 | 0.35-0.43 | 0.40Max | 0.50-0.80 | 0.025Max | 0.035Max | 0.60-1.00 | 0.15-0.25 | 0.70-1.00 |
3: Mechanical properties .
Mechanical properties for 39NiCrMo3 quenching and tempering alloy steel according to EN10083-3.
Size range | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value At RT/J |
d≤16 t≤8 | 980-1180Mpa | 785Mpa Min | 11% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 930-1130Mpa | 735Mpa Min | 11% Min | 40% Min | 35J Min |
| 40＜d≤100 20＜t≤60 | 880-1080Mpa | 685Mpa Min | 12% Min | 45% Min | 40J Min |
| 100＜d≤160 60＜t≤100 | 830-980Mpa | 635Mpa Min | 12% Min | 50% Min | 40J Min |
| 160＜d≤250 100＜t≤160 | 740-880Mpa | 540Mpa Min | 13% Min | 50% Min | 40J Min |
Sampling and preparation of test pieces for 39NiCrMo3 quenching and tempering steel.
1): According to EN10083-1, all samples shall be taken at a distance of 12.5mm below the heat treated surface
2): As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
| Soft annealed (+A) | HB240Max |
Quenched and tempred (+QT) | HRC28-32(Common Range) |
Where the steel is ordered by using the symbols for normal (+H) or restricted (+HL, +HH) hardenability requirements, the hardenability values should apply below:
Distance in mm from quenched end | ||||||||||||||||
Distance | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |
Hardness In HRC + H | max | 60 | 60 | 59 | 58 | 58 | 57 | 57 | 56 | 55 | 52 | 51 | 49 | 48 | 46 | 45 |
min | 52 | 51 | 50 | 49 | 48 | 46 | 44 | 43 | 39 | 36 | 34 | 33 | 32 | 31 | 30 | |
Hardness In HRC + HH | max | 60 | 60 | 59 | 58 | 58 | 57 | 57 | 56 | 55 | 52 | 51 | 49 | 48 | 46 | 45 |
min | 55 | 54 | 53 | 52 | 51 | 50 | 48 | 47 | 44 | 41 | 40 | 38 | 37 | 36 | 35 | |
Hardness In HRC + HL | max | 57 | 57 | 56 | 55 | 55 | 53 | 53 | 52 | 50 | 47 | 45 | 44 | 43 | 41 | 40 |
min | 52 | 51 | 50 | 49 | 48 | 46 | 44 | 43 | 39 | 36 | 34 | 33 | 32 | 31 | 30 | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ16-Φ300mm | 6000-9000mm |
Hot forged bar | Φ140-Φ800mm | 3000-5800mm |
Hot rolled plate/sheet | T:12-120mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
To ensure optimal performance for your application, we produce 1.6510 high speed tool steel on a dedicated make-to-order basis. This approach guarantees fresh production and allows us to customize the process for your specific requirements. Tell us your needs, and let's get started.
6：Forging processing
Put the 39NiCrMo3 ingot into the furnace and heat to 1150-1200℃
Cooling in the air after forged
7: Heat treatment
Soft annealed:
Heat 39NiCrMo3 steel to 830-860℃ in the furnace
Cooling in the furnace
Normalized:
Heat 39NiCrMo3 steel to 860-900℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 39NiCrMo3 steel to 830-850℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 550-650℃ in the furnace
Take out of 39NiCrMo3 steel from furnace and cool in the air.
Remark: The conditions given above are for guidance, at the temperatures at the lower end of the range are generally applicable to hardening in water and those at the upper end for hardening in oil.
8: Weldability
39NiCrMo3 alloy steel is classified as having challenging weldability due to its chemical composition. With a carbon content typically ranging from 0.35% to 0.43%, it surpasses the 0.25% threshold generally considered the point where weldability begins to deteriorate significantly in steel. Further compounded by significant additions of nickel, chromium, and molybdenum, the material exhibits a high carbon equivalent. This leads to a strong hardening tendency and increased susceptibility to hydrogen-induced cold cracking in the weld metal and heat-affected zone (HAZ).
9：Application
39NiCrMo3 is a quenched and tempered alloy structural steel. Due to its excellent comprehensive mechanical properties, it is widely used in the manufacturing of critical components requiring extremely high strength, toughness, and fatigue resistance. Its primary application areas include:
1. Automotive and Heavy-Duty Vehicles
Powertrain Systems: Used to manufacture critical components such as drive shafts, connecting rods, high-strength gears, and universal joint forks for heavy-duty trucks, buses, and construction machinery.
Engine Components: Used in high-performance or high-power engines for critical parts like crankshafts, camshafts, and valve spring seats
2. Aerospace and Defense Industry
Landing Gear Components: A classic material for manufacturing core load-bearing structures such as aircraft landing gear piston rods and struts, requiring extremely high strength, excellent fracture toughness, and fatigue resistance
Critical Connectors and Shaft Components: Used for manufacturing high-strength bolts, hinge joints, and helicopter rotor shafts in aircraft
3. Machinery Manufacturing and Equipment Industry
Heavy-Duty Shafts and Rotors: Suitable for producing heavy-duty machine tool spindles, turbine and compressor rotor shafts, and large pump shafts
Molds and Tools: Applicable for manufacturing mold bases for large plastic molds and core sleeves for die-casting molds
High-Strength Fasteners: Manufacture high-strength bolts (M20 and above) and studs for critical applications in wind power, mining machinery, and large-scale structural connections
4. Energy and Heavy Engineering
Oil and Gas Equipment: Used in manufacturing drill pipe joints, sucker rods, blowout preventer components, etc.
Wind Power Equipment: Suitable for producing high-load gear components like high-speed shafts and internal gear rings in wind turbine gearboxes
