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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: | |
|---|---|
35NiCr6
Country | USA | Europe |
Standard | ASTM A29 | EN10083-3 |
Grade | 3135 | 35NiCr6/1.5815 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni |
| 35NiCr6/1.5815 | 0.30-0.37 | 0.40Max | 0.60-0.90 | 0.025Max | 0.025Max | 0.80-1.10 | 1.20-1.60 |
3: Mechanical properties .
Mechanical properties for 35NiCr6 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 | 880-1080Mpa | 740Mpa Min | 12% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 880-1080Mpa | 740Mpa Min | 14% Min | 40%Min | 35J Min |
40＜d≤100 20＜t≤60 | 780-980Mpa | 640Mpa Min | 15% Min | 40%Min | 35J Min |
Sampling and preparation of test pieces for 35NiCr6 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) | HB223Max |
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 | 58 | 58 | 58 | 57 | 57 | 55 | 55 | 55 | 53 | 53 | 50 | 50 | / | / | / |
min | 49 | 49 | 49 | 48 | 48 | 44 | 44 | 44 | 40 | 40 | 35 | 35 | / | / | / | |
Hardness In HRC + HH | max | 58 | 58 | 58 | 57 | 57 | 55 | 55 | 55 | 53 | 53 | 50 | 50 | / | / | / |
min | 53 | 53 | 53 | 52 | 52 | 50 | 50 | 50 | 48 | 48 | 45 | 45 | / | / | / | |
Hardness In HRC + HL | max | 54 | 54 | 54 | 53 | 53 | 49 | 49 | 49 | 45 | 45 | 40 | 40 | / | / | / |
min | 49 | 49 | 49 | 48 | 48 | 44 | 44 | 44 | 40 | 40 | 35 | 35 | / | / | / | |
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. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
16 | 18 | 19 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | 45 | 48 |
50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 |
125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Put the 35NiCr6 ingot into the furnace and heat to 1150-1200℃
Cooling in the air after forged
7: Heat treatment
Soft annealed:
Heat 35NiCr6 steel to 550-650℃ in the furnace
Cooling in the furnace or in the air
Normalized:
Heat 35NiCr6 steel to 860-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 35NiCr6 steel to 840-860℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 530-630℃ in the furnace
Take out of 35NiCr6 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
35NiCr6 steel exhibits poor weldability, presenting considerable risks during welding processes. This is primarily attributed to its relatively high carbon equivalent and nickel-chromium alloy system, which significantly increase the hardening tendency and cold cracking susceptibility in both the weld metal and the heat-affected zone (HAZ). It is generally recognized that when the carbon content exceeds 0.25%, the weldability of steel begins to deteriorate markedly. The carbon content of 35NiCr6 ranges from 0.30% to 0.37%, and it is further alloyed with substantial nickel and chromium, placing it in a category that requires stringent pre-weld and post-weld thermal treatments as well as highly controlled welding procedures.
9：Application
35NiCr6 steel is a nickel-chromium alloy quenched and tempered steel. Due to its excellent comprehensive mechanical properties, good hardenability, and high fatigue strength, it is widely used in manufacturing critical components subjected to high loads, high stresses, and impact loads. Its primary application areas and typical components are as follows:
1. Heavy Machinery and General Machinery
Gears: Transmission gears for heavy-duty vehicles, large-to-medium gears for industrial reducers, critical transmission gears for machine tools
Shafts: Engine crankshafts, machine tool spindles, rear axle half-shafts for heavy vehicles, pump shafts, etc.
Connecting Rods: Engine connecting rods, press connecting rods, etc.
Bolts: High-strength heavy-duty connecting bolts, such as connecting rod bolts, cylinder head bolts, flange connection bolts
2. Automotive Industry
Transmission Systems: Transmission gears, drive shafts, universal joint forks
Engines: Crankshafts, connecting rods, high-stress bolts
3. Construction and Mining Machinery
Excavators, Cranes: Slewing ring gears, travel mechanism gears, critical shafts
Mining Equipment: Crusher gears, drive shafts, high-strength fasteners
4. Other Industrial Sectors
Wind Power Industry: Gears and shafts for gearboxes
Mold Industry: Occasionally used for mold bases in plastic molds or mold components requiring high toughness
Country | USA | Europe |
Standard | ASTM A29 | EN10083-3 |
Grade | 3135 | 35NiCr6/1.5815 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni |
| 35NiCr6/1.5815 | 0.30-0.37 | 0.40Max | 0.60-0.90 | 0.025Max | 0.025Max | 0.80-1.10 | 1.20-1.60 |
3: Mechanical properties .
Mechanical properties for 35NiCr6 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 | 880-1080Mpa | 740Mpa Min | 12% Min | 40% Min | / |
16＜d≤40 8＜t≤20 | 880-1080Mpa | 740Mpa Min | 14% Min | 40%Min | 35J Min |
40＜d≤100 20＜t≤60 | 780-980Mpa | 640Mpa Min | 15% Min | 40%Min | 35J Min |
Sampling and preparation of test pieces for 35NiCr6 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) | HB223Max |
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 | 58 | 58 | 58 | 57 | 57 | 55 | 55 | 55 | 53 | 53 | 50 | 50 | / | / | / |
min | 49 | 49 | 49 | 48 | 48 | 44 | 44 | 44 | 40 | 40 | 35 | 35 | / | / | / | |
Hardness In HRC + HH | max | 58 | 58 | 58 | 57 | 57 | 55 | 55 | 55 | 53 | 53 | 50 | 50 | / | / | / |
min | 53 | 53 | 53 | 52 | 52 | 50 | 50 | 50 | 48 | 48 | 45 | 45 | / | / | / | |
Hardness In HRC + HL | max | 54 | 54 | 54 | 53 | 53 | 49 | 49 | 49 | 45 | 45 | 40 | 40 | / | / | / |
min | 49 | 49 | 49 | 48 | 48 | 44 | 44 | 44 | 40 | 40 | 35 | 35 | / | / | / | |
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. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
16 | 18 | 19 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | 45 | 48 |
50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 |
125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Put the 35NiCr6 ingot into the furnace and heat to 1150-1200℃
Cooling in the air after forged
7: Heat treatment
Soft annealed:
Heat 35NiCr6 steel to 550-650℃ in the furnace
Cooling in the furnace or in the air
Normalized:
Heat 35NiCr6 steel to 860-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 35NiCr6 steel to 840-860℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 530-630℃ in the furnace
Take out of 35NiCr6 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
35NiCr6 steel exhibits poor weldability, presenting considerable risks during welding processes. This is primarily attributed to its relatively high carbon equivalent and nickel-chromium alloy system, which significantly increase the hardening tendency and cold cracking susceptibility in both the weld metal and the heat-affected zone (HAZ). It is generally recognized that when the carbon content exceeds 0.25%, the weldability of steel begins to deteriorate markedly. The carbon content of 35NiCr6 ranges from 0.30% to 0.37%, and it is further alloyed with substantial nickel and chromium, placing it in a category that requires stringent pre-weld and post-weld thermal treatments as well as highly controlled welding procedures.
9：Application
35NiCr6 steel is a nickel-chromium alloy quenched and tempered steel. Due to its excellent comprehensive mechanical properties, good hardenability, and high fatigue strength, it is widely used in manufacturing critical components subjected to high loads, high stresses, and impact loads. Its primary application areas and typical components are as follows:
1. Heavy Machinery and General Machinery
Gears: Transmission gears for heavy-duty vehicles, large-to-medium gears for industrial reducers, critical transmission gears for machine tools
Shafts: Engine crankshafts, machine tool spindles, rear axle half-shafts for heavy vehicles, pump shafts, etc.
Connecting Rods: Engine connecting rods, press connecting rods, etc.
Bolts: High-strength heavy-duty connecting bolts, such as connecting rod bolts, cylinder head bolts, flange connection bolts
2. Automotive Industry
Transmission Systems: Transmission gears, drive shafts, universal joint forks
Engines: Crankshafts, connecting rods, high-stress bolts
3. Construction and Mining Machinery
Excavators, Cranes: Slewing ring gears, travel mechanism gears, critical shafts
Mining Equipment: Crusher gears, drive shafts, high-strength fasteners
4. Other Industrial Sectors
Wind Power Industry: Gears and shafts for gearboxes
Mold Industry: Occasionally used for mold bases in plastic molds or mold components requiring high toughness
