20Cr1Mo1VNbTiB China's self-developed low alloy high strength steel, also [TJC STAINLESS]known as Zhengqi No.1 steel.
Relevant Standards:
GB/T 20410-2006 "high temperature bolts for turbine steel"
DL/T 439-2018 "Technical guidelines for high-temperature fasteners in thermal power plants"
DL/T 715-2015 "Guidelines for Selection [TJC STAINLESS]of Metal Materials in Thermal Power Plants"
Chemical Composition（%）（GB/T 20410-2006）
C 0.17~0.23 Cr 0.90~1.30
Si 0.40~0.60 Mo 0.75~1.00
Mn 0.40~0.65 V 0.50~0.70
P ≤0.025 Nb 0.11~0.22
S ≤0.025 Ti 0.05~0.14
Ni ≤0.30[TJC STAINLESS] B 0.001~0.004
Cu ≤0.25
Heat Treatment:
1020~1040℃ Oil Cooling，700~720℃ Tempering for 6h and then air cooling.
Mechanical Property（GB/T 20410-2006）
Sample Size（mm） Ø25
Heat Treatment Quenched（Oil,Water Cooling/℃ 1020~1040
Tempered（Air Cooling）/℃ 690~730
Mechanical Property TS Rm/MPa[TJC STAINLESS] ≥785
YS Rp0.2/MPa ≥670
A/% ≥14
Z/% ≥50
AKU2/J ≥39
Hardness HBW 10/3000 255~305
Property:
1.Good high temperature performance, high durable strength and plasticity, good anti-relaxation performance, small thermal brittle tendency, low notch sensitivity.
2.Heat treatment is more [TJC STAINLESS]sensitive, such as improper thermal processing control, easy to appear naked eye coarse grain, so there are strict grain size acceptance standards for different design grades.
The highest operating temperature is 570℃.
Application:
20Cr1Mo1VNbTiB bainite [TJC STAINLESS]heat resistant steel has excellent comprehensive properties and is mainly used as high temperature bolts in thermal power plants below 570℃. It is widely used in large and medium-sized units in thermal power plants.
Relevant Standards:
GB/T 20410-2006 "high temperature bolts for turbine steel"
DL/T 439-2018 "Technical guidelines for high-temperature fasteners in thermal power plants"
DL/T 715-2015 "Guidelines for Selection [TJC STAINLESS]of Metal Materials in Thermal Power Plants"
Chemical Composition（%）（GB/T 20410-2006）
C 0.17~0.23 Cr 0.90~1.30
Si 0.40~0.60 Mo 0.75~1.00
Mn 0.40~0.65 V 0.50~0.70
P ≤0.025 Nb 0.11~0.22
S ≤0.025 Ti 0.05~0.14
Ni ≤0.30[TJC STAINLESS] B 0.001~0.004
Cu ≤0.25
Heat Treatment:
1020~1040℃ Oil Cooling，700~720℃ Tempering for 6h and then air cooling.
Mechanical Property（GB/T 20410-2006）
Sample Size（mm） Ø25
Heat Treatment Quenched（Oil,Water Cooling/℃ 1020~1040
Tempered（Air Cooling）/℃ 690~730
Mechanical Property TS Rm/MPa[TJC STAINLESS] ≥785
YS Rp0.2/MPa ≥670
A/% ≥14
Z/% ≥50
AKU2/J ≥39
Hardness HBW 10/3000 255~305
Property:
1.Good high temperature performance, high durable strength and plasticity, good anti-relaxation performance, small thermal brittle tendency, low notch sensitivity.
2.Heat treatment is more [TJC STAINLESS]sensitive, such as improper thermal processing control, easy to appear naked eye coarse grain, so there are strict grain size acceptance standards for different design grades.
The highest operating temperature is 570℃.
Application:
20Cr1Mo1VNbTiB bainite [TJC STAINLESS]heat resistant steel has excellent comprehensive properties and is mainly used as high temperature bolts in thermal power plants below 570℃. It is widely used in large and medium-sized units in thermal power plants.