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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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41Cr4 / 1.7035 is a commonly used chromium alloy steel belonging to the European standard EN 10083-3 and EN 10250-3. It is widely applied in various industries, including automotive manufacturing, machinery construction, and general engineering. Due to its versatility, you can find its equivalent grades in different national standards, such as AISI 5140 from American standard ASTM A29/A29M, SCr440 from Japanese standard JIS G4105, 40Cr from Chinese standard GB/T 3077, 530M40 from British standard BS 970.
41Cr4 is part of the Cr steel series, with a carbon content of 0.38-0.45%. After quenching and tempering (QT), it achieves good strength, toughness, and wear resistance, making it suitable for high-stress components such as gears, shafts, and bolts. Its excellent hardenability and machinability also make it a preferred choice for heat-treated structural parts.
1: Steel equivalent
Country | USA | Europe | China | British | Japan |
Standard | ASTM A29 | EN10083-3 | GB/T3077 | BS970 | JIS G4104 |
Grade | 5140 | 41Cr4/1.7035 | 40Cr | 530M40 | SCr440 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
5140 | 0.38-0.43 | 0.15-0.35 | 0.70-0.90 | 0.035Max | 0.040Max | 0.7-0.9 |
41Cr4/1.7035 | 0.38-0.45 | 0.4Max | 0.60-0.90 | 0.035Max | 0.035Max | 0.9-1.2 |
40Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.030Max | 0.030Max | 0.8-1.1 |
530M40 | 0.36-0.44 | 0.10-0.40 | 0.60-0.90 | 0.035Max | 0.040Max | 0.9-1.2 |
SCr440 | 0.38-0.43 | 0.15-0.35 | 0.60-0.85 | 0.030Max | 0.030Max | 0.9-1.2 |
3: Mechanical properties .
Mechanical properties for 41Cr4 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 | 1000-1200Mpa | 800Mpa Min | 11% Min | 30% Min | / |
16＜d≤40 8＜t≤20 | 900-1100Mpa | 660Mpa Min | 12% Min | 35%Min | 35J Min |
40＜d≤100 20＜t≤60 | 800-950Mpa | 560Mpa Min | 14% Min | 40%Min | 35J Min |
Sampling and preparation of test pieces for 41Cr4 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.
Mechanical properties for 41Cr4 open die forgings steel according to EN10250-3
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
14% Min | 35J Min | |||||
d≤70 | 800Mpa Min | 560Mpa Min | ||||
Sampling and preparation of test pieces for steel forging.
1: According to EN10250-1, all samples shall be taken at a distance of 4/T below the heat treated surface (with a minimum of 20mm and a maximum of 80mm), and t/2 from the end (where t is the equivalent thickness of the thickness of the ruling section of the forging at the time of heat treatment.
2: As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Flame or Induction hardening | 53HRC |
Treated to improve shearability (+S) | HB255Max |
Soft annealed (+A) | HB241Max |
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 | 61 | 61 | 60 | 59 | 58 | 56 | 54 | 52 | 46 | 42 | 40 | 38 | 37 | 36 | 35 |
min | 53 | 52 | 50 | 47 | 41 | 37 | 34 | 32 | 29 | 26 | 23 | 21 | / | / | / | |
Hardness In HRC + HH | max | 61 | 61 | 60 | 59 | 58 | 56 | 54 | 52 | 46 | 42 | 40 | 38 | 37 | 36 | 35 |
min | 56 | 55 | 53 | 51 | 47 | 43 | 41 | 39 | 35 | 31 | 29 | 27 | 26 | 25 | 24 | |
Hardness In HRC + HL | max | 58 | 58 | 57 | 55 | 52 | 50 | 47 | 45 | 40 | 37 | 34 | 32 | 31 | 30 | 29 |
min | 53 | 52 | 50 | 47 | 41 | 37 | 34 | 32 | 29 | 26 | 23 | 21 | / | / | / | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ18-Φ300mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; 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
18 | 20 | 22 | 24 | 25 | 28 | 30 | 32 | 35 | 36 | 38 | 40 | 42 | 48 | 48 |
50 | 52 | 55 | 60 | 65 | 70 | 72 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 |
115 | 120 | 125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 | 240 |
250 | 260 | 270 | 280 | 290 | 300 |
2) : Hot Forged bar, we don't have stocks, but we have stock for raw material, the delivery date could be within 15 days, and MOQ could be one piece.
Since the hot rolled stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Put the 41Cr4 ingot into the furnace and heat to 1150-1200℃
Forge the ingot, forging temperature should be not less than 800-850℃
Cooling in the sand after forged
7: Heat treatment
Soft annealed:
Heat 41Cr4 steel to 670-710℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace
Normalized:
Heat 41Cr4 steel to 850-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 41Cr4 steel to 820-860℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 540-680℃ in the furnace
Take out of 41Cr4 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
41Cr4 steel has moderate to poor weldability. For steel materials, weldability is closely related to carbon content, when the carbon content exceeds 0.25%, weldability begins to deteriorate. The carbon content of 41Cr4 ranges between 0.38-0.45%, significantly higher than the 0.25% threshold, resulting in challenging welding characteristics.
9：Application
41Cr4 is a medium-carbon chromium alloy steel that has a wide range of applications in the industrial field due to its excellent mechanical properties and heat treatment characteristics. The following are its main application areas and typical uses:
1): Gears, drive shafts, camshafts and other key transmission components; high-strength bolts, connecting rods, flanges; cylinder piston rods, hydraulic valve cores, etc.
2): Transmission gears, differential parts, steering knuckles, steering shafts, suspension arms, torsion bars.
3): Mold accessories, jigs and fixtures, tooling substrates
4): Wear-resistant parts such as bearing rings, rolling elements, structural parts, harvester knives, transmission chains, etc.
41Cr4 / 1.7035 is a commonly used chromium alloy steel belonging to the European standard EN 10083-3 and EN 10250-3. It is widely applied in various industries, including automotive manufacturing, machinery construction, and general engineering. Due to its versatility, you can find its equivalent grades in different national standards, such as AISI 5140 from American standard ASTM A29/A29M, SCr440 from Japanese standard JIS G4105, 40Cr from Chinese standard GB/T 3077, 530M40 from British standard BS 970.
41Cr4 is part of the Cr steel series, with a carbon content of 0.38-0.45%. After quenching and tempering (QT), it achieves good strength, toughness, and wear resistance, making it suitable for high-stress components such as gears, shafts, and bolts. Its excellent hardenability and machinability also make it a preferred choice for heat-treated structural parts.
1: Steel equivalent
Country | USA | Europe | China | British | Japan |
Standard | ASTM A29 | EN10083-3 | GB/T3077 | BS970 | JIS G4104 |
Grade | 5140 | 41Cr4/1.7035 | 40Cr | 530M40 | SCr440 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
5140 | 0.38-0.43 | 0.15-0.35 | 0.70-0.90 | 0.035Max | 0.040Max | 0.7-0.9 |
41Cr4/1.7035 | 0.38-0.45 | 0.4Max | 0.60-0.90 | 0.035Max | 0.035Max | 0.9-1.2 |
40Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.030Max | 0.030Max | 0.8-1.1 |
530M40 | 0.36-0.44 | 0.10-0.40 | 0.60-0.90 | 0.035Max | 0.040Max | 0.9-1.2 |
SCr440 | 0.38-0.43 | 0.15-0.35 | 0.60-0.85 | 0.030Max | 0.030Max | 0.9-1.2 |
3: Mechanical properties .
Mechanical properties for 41Cr4 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 | 1000-1200Mpa | 800Mpa Min | 11% Min | 30% Min | / |
16＜d≤40 8＜t≤20 | 900-1100Mpa | 660Mpa Min | 12% Min | 35%Min | 35J Min |
40＜d≤100 20＜t≤60 | 800-950Mpa | 560Mpa Min | 14% Min | 40%Min | 35J Min |
Sampling and preparation of test pieces for 41Cr4 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.
Mechanical properties for 41Cr4 open die forgings steel according to EN10250-3
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
14% Min | 35J Min | |||||
d≤70 | 800Mpa Min | 560Mpa Min | ||||
Sampling and preparation of test pieces for steel forging.
1: According to EN10250-1, all samples shall be taken at a distance of 4/T below the heat treated surface (with a minimum of 20mm and a maximum of 80mm), and t/2 from the end (where t is the equivalent thickness of the thickness of the ruling section of the forging at the time of heat treatment.
2: As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Flame or Induction hardening | 53HRC |
Treated to improve shearability (+S) | HB255Max |
Soft annealed (+A) | HB241Max |
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 | 61 | 61 | 60 | 59 | 58 | 56 | 54 | 52 | 46 | 42 | 40 | 38 | 37 | 36 | 35 |
min | 53 | 52 | 50 | 47 | 41 | 37 | 34 | 32 | 29 | 26 | 23 | 21 | / | / | / | |
Hardness In HRC + HH | max | 61 | 61 | 60 | 59 | 58 | 56 | 54 | 52 | 46 | 42 | 40 | 38 | 37 | 36 | 35 |
min | 56 | 55 | 53 | 51 | 47 | 43 | 41 | 39 | 35 | 31 | 29 | 27 | 26 | 25 | 24 | |
Hardness In HRC + HL | max | 58 | 58 | 57 | 55 | 52 | 50 | 47 | 45 | 40 | 37 | 34 | 32 | 31 | 30 | 29 |
min | 53 | 52 | 50 | 47 | 41 | 37 | 34 | 32 | 29 | 26 | 23 | 21 | / | / | / | |
Scatter bands for the Rockwell - C hardness in the end quench hardenability test.
5: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ18-Φ300mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; 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
18 | 20 | 22 | 24 | 25 | 28 | 30 | 32 | 35 | 36 | 38 | 40 | 42 | 48 | 48 |
50 | 52 | 55 | 60 | 65 | 70 | 72 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 |
115 | 120 | 125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 | 240 |
250 | 260 | 270 | 280 | 290 | 300 |
2) : Hot Forged bar, we don't have stocks, but we have stock for raw material, the delivery date could be within 15 days, and MOQ could be one piece.
Since the hot rolled stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Put the 41Cr4 ingot into the furnace and heat to 1150-1200℃
Forge the ingot, forging temperature should be not less than 800-850℃
Cooling in the sand after forged
7: Heat treatment
Soft annealed:
Heat 41Cr4 steel to 670-710℃ in the furnace
Soak at this temperature in the furnace
Cooling in the furnace
Normalized:
Heat 41Cr4 steel to 850-880℃ in the furnace
Soak at this temperature in the furnace
Cooling in the air
Quenching and tempering:
Heat 41Cr4 steel to 820-860℃ in the furnace
Soak at this temperature in the furnace
Quench in water or oil
Temper steel at 540-680℃ in the furnace
Take out of 41Cr4 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
41Cr4 steel has moderate to poor weldability. For steel materials, weldability is closely related to carbon content, when the carbon content exceeds 0.25%, weldability begins to deteriorate. The carbon content of 41Cr4 ranges between 0.38-0.45%, significantly higher than the 0.25% threshold, resulting in challenging welding characteristics.
9：Application
41Cr4 is a medium-carbon chromium alloy steel that has a wide range of applications in the industrial field due to its excellent mechanical properties and heat treatment characteristics. The following are its main application areas and typical uses:
1): Gears, drive shafts, camshafts and other key transmission components; high-strength bolts, connecting rods, flanges; cylinder piston rods, hydraulic valve cores, etc.
2): Transmission gears, differential parts, steering knuckles, steering shafts, suspension arms, torsion bars.
3): Mold accessories, jigs and fixtures, tooling substrates
4): Wear-resistant parts such as bearing rings, rolling elements, structural parts, harvester knives, transmission chains, etc.
