05Cr 17Ni4Cu4Nb steel is a martensitic precipitation hardening stainless steel. Copper and niobium are added to steel, which is a traditional stainless heat-resistant steel. The strength can be adjusted by changing the heat treatment process. Because of its low carbon content, its corrosion resistance and weldability are better than martensitic stainless steel, but close to austenitic stainless steel. The heat treatment process of 05Cr 17Ni4Cu4Nb steel is simple, and single lath martensite can be obtained after solution treatment, with hardness of 32~34HRC and good machinability. After aging at 460~480℃, the hardness of the steel can reach 40HRC, the hardness and strength are improved, and the comprehensive mechanical properties are improved, but it is difficult to carry out deep cold forming. 05Cr 17Ni4Cu4Nb steel can work in the temperature range of -29℃ to 343℃ while maintaining relatively good parameters. The ductility of 05Cr 17Ni4Cu4Nb material is relatively good, and its corrosion resistance is equivalent to that of 0Cr 18Ni9.
Please remember that it is a precipitation hardening steel and should be used after dissolution and aging.
& gt>>>>>>>>>>>>>>>>>>> material standard.
DIN X5CrNiCuNb 16-4
1.4548 xcrnicunb 17-4-4
17-PH
AISI 630
AFNOR Z6CNU 17-04
AMS 5604 / AMS 5622 / AMS 5643
UNS S 17400
JIS SUS 630
& gt>>>>>>>>>>>>>>>>> available shapes.
Spot inquiry of bars, plates, forgings and pipes
& gt>>>>>>>>>>>>>>>>>>>>>> component content.
Carbon: ≤0.07
Chromium: 15.0- 17.5
Nickel: 3.0-5.0
Copper: 3.0-5.0
Manganese: ≤ 1.00
Silicon: ≤ 1.00
Phosphorus: ≤0.040
Sulfur: ≤0.030
Niobium+Tantalum: 0. 15-0.45
& gt>>>>>>>>>>>>>>>>>>>>>> mechanical properties.
Tensile strength, r? Male:< 1200 MPa
Hardness, HB:
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Heat capacity, c? p20℃:500 J * kg？ - 1? * K？ - 1
Thermal conductivity, λ: 16 w * m? - 1? * K？ - 1
Elastic modulus, e: 200 GPA
Density: 7.8g/cm? three
Linear expansion coefficient, α20? ℃: 10.9 * 10? -? 6? k？ - 1
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Preliminary heat treatment of 05Cr 17Ni4Cu4Nb steel
The hardness after forging is higher than 35HRC, so it is necessary to soften the 05Cr 17Ni4Cu4Nb steel before processing. There are three methods in production practice:
First, solution treatment: 1020~ 1060℃ heating, oil cooling, hardness 28~30HRC.
Ⅱ High temperature tempering: heating temperature 720~740℃, furnace cooling or air cooling, hardness 28 ~ 32 hours RC.
ⅲ annealing: heating at 820~840℃, cooling with the furnace to below 500℃, and hardness of 28~30HRC.
Solution treatment of 05Cr 17Ni4Cu4Nb steel
The solution temperature is 1020~ 1060℃, the microstructure is low carbon martensite, and the hardness is 32~34HRC.
Aging treatment of 05Cr 17Ni4Cu4Nb steel
The recommended aging temperature is 480℃, aging time is 4h and hardness is 40HRC.
& gt>>>>>>>>>>>>>>>>>>>>>> application field.
05Cr 17Ni4Cu4Nb steel is used for high-strength parts that require both rust prevention and corrosion resistance of weak acids, alkalis and salts, such as plastic molds, steam turbine parts and shafts.