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E: enquiry@qilumetal.com
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16MnCr5 / 1.7131 is an alloyed carburizing steel belonging to the European standards EN 10084 and ISO683-11. It is used in the manufacture of components such as gears, worm gears, sealing bushings, plastic molds, turbine oil seals and gasoline bushings. You can find the corresponding products in different national standards, such as American Standard ASTM 5115 (ASTM A29/A29M) and Chinese Standard 16CrMnH/20CrMnTi (GB/T 3077).
16MnCr5 is part of the Mn-Cr steel series, with a carbon content ranging from 0.14-0.19%. This steel is highly regarded for its excellent hardenability and ability to achieve a uniform hardness profile after carburizing and heat treatment. It offers a combination of good machinability, high surface hardness, and sufficient core strength, making it suitable for parts exposed to dynamic loads and wear.
1: Steel equivalent
Country | USA | Europe | China |
Standard | ASTM A29 | EN10084 | GB/T3077 |
Grade | 5115 | 16MnCr5/1.7131 | 16CrMnH/20CrMnTi |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
5115 | 0.13-0.18 | 0.15-0.35 | 0.70-0.90 | 0.035Max | 0.040Max | 0.7-0.9 |
16MnCr5/1.7131 | 0.14-0.19 | 0.40Max | 1.00-1.30 | 0.025Max | 0.035Max | 0.8-1.1 |
20CrMnTi | 0.17-0.23 | 0.17-0.37 | 0.80-1.10 | 0.030Max | 0.030Max | 1.0-1.3 |
3: Mechanical properties .
Steel grades 16MnCr5 according to minimum tensile strength as a function of diameter after hardening and tempering at 200℃ according to EN10084.
Size range | Tensile strength |
d≤16 | 1000Mpa Min |
16＜d≤40 | 800Mpa Min |
40＜d≤100 | 500Mpa Min |
Mechanical properties for reference test bar in the simulated case-hardening condition according to ISO 683-11-1987.
Size range | Tensile strength | Yield strength | Alongation | Impact value At RT/J |
d=16 | 880-1230Mpa | 600Mpa Min | 9% Min | 25J Min |
d=30 | 770-1120Mpa | 520Mpa Min | 10% Min | 25J Min |
d=63 | 650-1000Mpa | 450Mpa Min | 11% Min | 25J Min |
Sampling and preparation of test pieces for 16MnCr5 case-hardening steel.
1): According to EN10084, all samples shall be taken at a distance of 1/4 of the diameter or thickness below the heat-treated surface.
2): As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Treated to improve shearability (+S) | HB255Max |
Soft annealed (+A) | HB207Max |
Treated to hardness range(+TH) | 156-207HBW |
Treated to ferrite-pearlite structure and hardness range(+FP) | 140-187HBW |
Normalized(+N) | 138-187HBW |
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 | |
Hardness In HRC + H | max | 47 | 46 | 44 | 41 | 39 | 37 | 35 | 33 | 31 | 30 | 29 | 28 | 27 |
min | 39 | 36 | 31 | 28 | 24 | 21 | / | / | / | / | / | / | / | |
Hardness In HRC + HH | max | 47 | 46 | 44 | 41 | 39 | 37 | 35 | 33 | 31 | 30 | 29 | 28 | 27 |
min | 42 | 39 | 35 | 32 | 29 | 26 | 24 | 22 | 20 | / | / | / | / | |
Hardness In HRC + HL | max | 44 | 43 | 40 | 37 | 34 | 32 | 30 | 28 | 26 | 25 | 24 | 23 | 22 |
min | 39 | 36 | 31 | 28 | 24 | 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 |
Hot rolled bar | Φ14-Φ280mm | 6000-9000mm |
Hot forged bar | Φ140-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:20-120mm; W:410-810mm | 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
14 | 16 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 130 |
140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Pre-heat: 600-700℃
Initial temperature: 1150-1200℃
Forge the ingot, forging temperature should be not less than 850-900℃
Cooling in the air
7: Heat treatment
Soft annealed:
Heat 16MnCr5 steel to 790-810℃
Cooling in the furnace
Normalized:
Heat 16MnCr5 steel to 880-900℃
Cooling in the air
End quench test Austenitizing temperature: 870℃
Carburizing temperature: 880-980℃
Core-hardening temperature: 860-900℃
Case-hardening temperature: 780-820℃
Quenching and tempering:
Heat 16MnCr5 steel to 820-850℃
Quench in water or oil
Temper steel at 150-200℃
Cooling 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
16MnCr5 steel has moderate weldability. For steel material, weldability has a strong relationship with the carbon element; when the carbon content is more than 0.25%, the weldability tends to deteriorate. The carbon content of 16MnCr5 is around 0.14%-0.19%, which is relatively low, but its weldability is still influenced by other alloying elements such as manganese and chromium. These elements can increase hardness and strength but may also lead to cracking during welding if proper precautions are not taken. Therefore, preheating and post-weld heat treatment are often recommended to improve weldability and reduce the risk of cracking.
9：Application
16MnCr5 is a carburized steel with good hardenability, toughness and wear resistance, which is widely used in the following fields.
1): Gear manufacturing: commonly used in the manufacture of automobiles, construction machinery and industrial equipment in the gear, drive shafts and other parts.
2): Automotive industry: transmission gears, differential gears, drive shafts and other parts requiring high strength and wear resistance.
3): Mechanical Manufacturing: 16MnCr5 steel is used to manufacture high-load mechanical parts, such as bearings, shaft parts, couplings and so on.
4): Tools and molds: Due to its good machinability and heat treatment properties, 16MnCr5 steel can also be used to make some tools and molds, especially in the need for high surface hardness and wear resistance.
6): 16MnCr5 steel can also be used in the manufacture of some engineering components that require high strength and wear resistance, such as mining machinery, agricultural machinery and key parts in heavy equipment.
16MnCr5 / 1.7131 is an alloyed carburizing steel belonging to the European standards EN 10084 and ISO683-11. It is used in the manufacture of components such as gears, worm gears, sealing bushings, plastic molds, turbine oil seals and gasoline bushings. You can find the corresponding products in different national standards, such as American Standard ASTM 5115 (ASTM A29/A29M) and Chinese Standard 16CrMnH/20CrMnTi (GB/T 3077).
16MnCr5 is part of the Mn-Cr steel series, with a carbon content ranging from 0.14-0.19%. This steel is highly regarded for its excellent hardenability and ability to achieve a uniform hardness profile after carburizing and heat treatment. It offers a combination of good machinability, high surface hardness, and sufficient core strength, making it suitable for parts exposed to dynamic loads and wear.
1: Steel equivalent
Country | USA | Europe | China |
Standard | ASTM A29 | EN10084 | GB/T3077 |
Grade | 5115 | 16MnCr5/1.7131 | 16CrMnH/20CrMnTi |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
5115 | 0.13-0.18 | 0.15-0.35 | 0.70-0.90 | 0.035Max | 0.040Max | 0.7-0.9 |
16MnCr5/1.7131 | 0.14-0.19 | 0.40Max | 1.00-1.30 | 0.025Max | 0.035Max | 0.8-1.1 |
20CrMnTi | 0.17-0.23 | 0.17-0.37 | 0.80-1.10 | 0.030Max | 0.030Max | 1.0-1.3 |
3: Mechanical properties .
Steel grades 16MnCr5 according to minimum tensile strength as a function of diameter after hardening and tempering at 200℃ according to EN10084.
Size range | Tensile strength |
d≤16 | 1000Mpa Min |
16＜d≤40 | 800Mpa Min |
40＜d≤100 | 500Mpa Min |
Mechanical properties for reference test bar in the simulated case-hardening condition according to ISO 683-11-1987.
Size range | Tensile strength | Yield strength | Alongation | Impact value At RT/J |
d=16 | 880-1230Mpa | 600Mpa Min | 9% Min | 25J Min |
d=30 | 770-1120Mpa | 520Mpa Min | 10% Min | 25J Min |
d=63 | 650-1000Mpa | 450Mpa Min | 11% Min | 25J Min |
Sampling and preparation of test pieces for 16MnCr5 case-hardening steel.
1): According to EN10084, all samples shall be taken at a distance of 1/4 of the diameter or thickness below the heat-treated surface.
2): As stipulated in the contract between buyer and seller.
4: Surface hardness and hardenability.
Heat Treatment | Hardness |
Treated to improve shearability (+S) | HB255Max |
Soft annealed (+A) | HB207Max |
Treated to hardness range(+TH) | 156-207HBW |
Treated to ferrite-pearlite structure and hardness range(+FP) | 140-187HBW |
Normalized(+N) | 138-187HBW |
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 | |
Hardness In HRC + H | max | 47 | 46 | 44 | 41 | 39 | 37 | 35 | 33 | 31 | 30 | 29 | 28 | 27 |
min | 39 | 36 | 31 | 28 | 24 | 21 | / | / | / | / | / | / | / | |
Hardness In HRC + HH | max | 47 | 46 | 44 | 41 | 39 | 37 | 35 | 33 | 31 | 30 | 29 | 28 | 27 |
min | 42 | 39 | 35 | 32 | 29 | 26 | 24 | 22 | 20 | / | / | / | / | |
Hardness In HRC + HL | max | 44 | 43 | 40 | 37 | 34 | 32 | 30 | 28 | 26 | 25 | 24 | 23 | 22 |
min | 39 | 36 | 31 | 28 | 24 | 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 |
Hot rolled bar | Φ14-Φ280mm | 6000-9000mm |
Hot forged bar | Φ140-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:20-120mm; W:410-810mm | 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
14 | 16 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 130 |
140 | 150 | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
6：Forging processing
Pre-heat: 600-700℃
Initial temperature: 1150-1200℃
Forge the ingot, forging temperature should be not less than 850-900℃
Cooling in the air
7: Heat treatment
Soft annealed:
Heat 16MnCr5 steel to 790-810℃
Cooling in the furnace
Normalized:
Heat 16MnCr5 steel to 880-900℃
Cooling in the air
End quench test Austenitizing temperature: 870℃
Carburizing temperature: 880-980℃
Core-hardening temperature: 860-900℃
Case-hardening temperature: 780-820℃
Quenching and tempering:
Heat 16MnCr5 steel to 820-850℃
Quench in water or oil
Temper steel at 150-200℃
Cooling 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
16MnCr5 steel has moderate weldability. For steel material, weldability has a strong relationship with the carbon element; when the carbon content is more than 0.25%, the weldability tends to deteriorate. The carbon content of 16MnCr5 is around 0.14%-0.19%, which is relatively low, but its weldability is still influenced by other alloying elements such as manganese and chromium. These elements can increase hardness and strength but may also lead to cracking during welding if proper precautions are not taken. Therefore, preheating and post-weld heat treatment are often recommended to improve weldability and reduce the risk of cracking.
9：Application
16MnCr5 is a carburized steel with good hardenability, toughness and wear resistance, which is widely used in the following fields.
1): Gear manufacturing: commonly used in the manufacture of automobiles, construction machinery and industrial equipment in the gear, drive shafts and other parts.
2): Automotive industry: transmission gears, differential gears, drive shafts and other parts requiring high strength and wear resistance.
3): Mechanical Manufacturing: 16MnCr5 steel is used to manufacture high-load mechanical parts, such as bearings, shaft parts, couplings and so on.
4): Tools and molds: Due to its good machinability and heat treatment properties, 16MnCr5 steel can also be used to make some tools and molds, especially in the need for high surface hardness and wear resistance.
6): 16MnCr5 steel can also be used in the manufacture of some engineering components that require high strength and wear resistance, such as mining machinery, agricultural machinery and key parts in heavy equipment.
