High Temperature Fasteners-- maintain high strength under high temperatures
Products Features
7709 steel is a high-performance alloy steel, also known as 21CrMoV5-7, and is widely used in the manufacturing of high-strength, high-temperature-resistant fasteners such as bolts and nuts. The following is an in-depth introduction to the screws made of 1.7709 material:
(1).Chemical composition: It mainly consists of carbon (C: 0.17-0.25), silicon (Si: 0.15-0.35), manganese (Mn: 0.35-0.85), chromium (Cr: 1.20-1.50), molybdenum (Mo: 0.65-0.80), and vanadium (V: 0.25-0.35) and other elements. The reasonable proportion of these elements gives the steel excellent comprehensive properties.
(2). Mechanical properties: In the heat-treated state, 1.7709 steel has high strength and good mechanical properties. Its yield strength (Rp0.2) can reach ≥550 MPa, tensile strength (PM) can reach ≥700 MPa, elongation (A) ≥16%, and reduction of area (A) ≥60%.
(3).Heat resistance: This material can still maintain good mechanical properties in high-temperature environments and is suitable for working conditions with temperatures exceeding 300°C.
Application
High-temperature high-strength fasteners (H-T H-S Fasteners) need to simultaneously meet requirements such as high-temperature strength, anti-rust property and corrosion resistance in extreme environments. Their core application fields are as follows:
(1) Aerospace field
Aerospace engine: The turbine blade fasteners are manufactured using nickel-based high-temperature alloys (such as GH4049), maintaining a tensile strength of ≥ 1000 MPa at 600 - 900℃, and achieving complex shape processing through die forging technology.
Spacecraft structure: Components used for connecting the combustion chamber of the rocket engine, must withstand instantaneous high temperatures (>1200℃) and vibration loads.
(2) Energy and Power Industry
Nuclear power plant: The bolts of the reactor pressure vessel must meet a lasting strength of ≥ 95 MPa (at 700°C/100,000 hours), to prevent hydrogen embrittlement and stress corrosion cracking.
Gas turbine: High-temperature bolts (such as A286 alloy) are used to fix the turbine discs and must undergo creep limit tests (1% total deformation/1000 hours)
(3) Petroleum Chemical Industry and Marine Engineering
Refining and processing unit: The bolts of the hydrogenation reactor need to be used for a long time under high temperature and high pressure (400℃/20MPa), and the material must pass the hydrogen-induced delayed fracture test.
(4) Commercial installation
Mold manufacturing: The fastening components of composite material molds need to match a low thermal expansion coefficient (CTE ≤ 10⁻⁶/℃) to maintain dimensional stability.
(5) Automobiles and Rail Transit
New energy vehicles: The motor shaft bolts are made of titanium alloy (such as TC4), with a tensile strength of up to 900 MPa and no magnetic interference. The tapping process needs to be optimized to reduce work hardening.
The following is the main types of high temperature fasteners
High Temperature Fasteners Available Types | |||
Digital Grade |
Material |
Executive Standard |
Withstand Temperature |
2.4851/UNS N06601/Alloy601 |
NiCr23Fe |
DIN17742/EN10095/ASTM B166 |
1200℃ |
2.4633/UNS N06025/Alloy602 |
NiCr25FeALY |
DIN EN 10302/ASTM B166 |
1200℃ |
2.4851 |
NiCr23Fe |
DIN EN10095 |
1200℃ |
2.4889 |
NiCr28FeSiCe |
DIN EN10095 |
1170℃ |
1.4854 |
X6NiCrSiNCe35-25 |
DIN EN10095 |
1170℃ |
1.4762 |
X10CrAISi25 |
DIN EN10095 |
1150℃ |
2.4816/UNS N06600/Alloy600 |
NiCr15Fe |
DIN17742/EN10095/ASTM B166 |
1150℃ |
1.4841/AISI310S/AISI314 |
X15CrNiSi25-21 |
EN10095/SEW470 |
1150℃ |
1.4762/SICRO12 |
X10CrAISi25 |
EN10095/SEW470 |
1150℃ |
2.4665/UNS N06002/Alloy X |
NiCr19NbMo |
ASTM B572 |
1100℃ |
2.4663/UNS N06617/Alloy617 |
NiCr23Co12Mo |
ASTM B166 |
1100℃ |
1.4864/Alloy330 |
X12NiCrSi36-16 |
EN10095/SEW470 |
1100℃ |
1.4835/Alloy253 MA |
X9CrNiSiNCe21-11-2 |
EN10095 |
1100℃ |
1.4835 |
X9CrNiSiNCe21-11-2 |
DIN EN10095 |
1100℃ |
1.4877 |
X6NiCrNbCe32-27 |
DIN EN10095 |
1100℃ |
1.4872 |
X25CrMnNiN25-9-7 |
DIN EN10095 |
1100℃ |
1.4841 |
X15CrNiSi25-21 |
DIN EN10095 |
1100℃ |
2.4816 |
NiCr15Fe |
DIN EN10095 |
1100℃ |
1.4749 |
X18CrN28 |
DIN EN10095 |
1100℃ |
1.4845/AISI310/AISI3105 |
X8CrNi25-21 |
EN10095/SEW470/ASTM A276 |
1050℃ |
1.4864 |
X12NiCrSi35-16 |
DIN EN10095 |
1050℃ |
1.4886 |
X10NiCrSi35-19 |
DIN EN10095 |
1050℃ |
1.4887 |
X10NiCrSiNb35-22 |
DIN EN10095 |
1050℃ |
1.4821 |
X15CrNiSi25-4 |
DIN EN10095 |
1050℃ |
1.4876 |
X10NiCrAITi32-21 |
DIN EN10095 |
1050℃ |
1.4818 |
X6CrNiSiNCe19-10 |
DIN EN10095 |
1050℃ |
1.4845 |
X8CrNi25-21 |
DIN EN10095 |
1000℃ |
1.4742 |
X10CrAISi18 |
DIN EN10095 |
1000℃ |
1.4828/AISI3095 |
X15CrNiSi20-12 |
EN10095/SEW470/ASTM A276 |
1000℃ |
1.4742/SICRO 10 |
X10CrAISi18 |
EN10095/SEW470 |
1000℃ |
2.4634/UNS N13021/Alloy 105 |
NiCo20Cr15MoAITi |
ASTM B637 |
950℃ |
1.4876H/Alloy800H |
X10NiCrAITi32-20H |
ASTM B408 |
950℃ |
2.4969/UNS N07090/Alloy90 |
NiCr20Co18Ti |
DIN EN10302/BS 2HR2 |
920℃ |
1.4876HT/Alloy 800HT |
X10NiCrAITi32-20HT |
ASTM B408 |
900℃ |
1.4878/AISI 321H |
X8CrNiTi18-10 |
EN10095/SEW470 |
850℃ |
1.4724/SICRO 9 |
X10CrAISi13 |
EN10095/SEW470 |
850℃ |
1.4736 |
X3CrAITi18-2 |
DIN EN10095 |
850℃ |
1.4828 |
X15CrNiSi20-12 |
DIN EN10095 |
850℃ |
1.4833 |
X12CrNi23-13 |
DIN EN10095 |
850℃ |
2.4856 |
NiCr22Mo9Nb |
DIN EN10095 |
850℃ |
1.4724 |
X10CrAISi13 |
DIN EN10095 |
850℃ |
1.4878 |
X8CrNiTi18-10 |
DIN EN10095 |
800℃ |
1.4713 |
X10CrAISi7 |
DIN EN10095 |
800℃ |
2.4952/UNS N07080/Alloy 80A |
NiCr20TiAI |
DIN EN10269/ASTM B 637 |
800℃ |
1.4713/SICRO 8 |
X10CrAISi7 |
EN10095/SEW470 |
800℃ |
1.4981 |
X8CrNiMoNb16-16 |
|
750℃ |
2.4668/UNS N07718/Alloy 718 |
NiCr19Fe19Nb5Mo3 |
DIN EN 10269/ASTM B637 |
700℃ |
1.4986wk |
X7CrNiMoBNb16-16 |
DIN EN 10269/2 |
670℃ |
1.4980/Alloy268/660A/B/C/D |
X6NiCrTiMoVB25-15-2 |
DIN EN10269/ASTM 453 |
650℃ |
2.4669 |
NiCr15Fe7TiAI |
|
650℃ |
2.4952 |
NiCr20TiAI |
|
600℃ |
1.4980 |
X6NiCrTiMoVB25-15-2 |
|
600℃ |
1.4982 |
X10CrNiMoMnNbVB15-10-1 |
|
600℃ |
1.4986 |
X7CrNiMoBNb16-16 |
DIN EN 10269 |
600℃ |
1.7233 |
42CrMo5-6 |
|
600℃ |
1.4923 |
X22CrMoV12-1 |
DIN EN 10269 |
600℃ |
1.4913 |
X19CrMoNbVN11-1 |
DIN EN 10269 |
600℃ |
1.7711 |
40CrMoV4-6 |
DIN EN 10269 |
550℃ |
1.7709 |
21CrMoV5-7 |
DIN EN 10269 |
550℃ |
1.7218 |
25CrMo4 |
DIN EN 10269 |
550℃ |
1.4562/UNS N08031/Alloy31 |
X1NiCrMoCu32-28-7 |
ASTM B581/B649 |
550℃ |
1.7711 |
40CrMoV4-6 |
DIN EN 10269 |
550℃ |
1.4913 |
X19CrMoNbVN11-1 |
DIN EN 10269 |
550℃ |
1.4948 |
X6CrNi18-10 |
|
550℃ |
1.4429 |
X2CrNiMoN17-13-3 |
|
550℃ |
1.4401 |
X5CrNiMo17-12-2 |
|
500℃ |
1.4404 |
X2CrNiMo17-12-2 |
|
500℃ |
1.4303 |
X4CrNi18-12 |
DINen10269 |
500℃ |
1.4301 |
X4CrNi18-10 |
|
500℃ |
1.4307 |
X2CrNi18-9 |
|
500℃ |
1.7729 |
20CrMoVTiB4-10 |
|
500℃ |
1.7729 |
20CrMoVTiB4-10 |
DIN EN 10269 |
500℃ |
1.7225 |
42CrMO4 |
DIN EN 10269 |
500℃ |
2.4858/UNS N08825/Alloy825 |
NiCr21Mo |
DIN17744/17752/ASTM B425 |
450℃ |
2.4856/UNS N06625/Alloy625 |
NiCr22Mo9Nb |
ASTM B446/B 564/E112 |
450℃ |
2.4816/UNS N06600/Alloy600 |
NiCr15Fe |
ASTM B 166 |
450℃ |
2.4605/UNS N06059/Alloy59 |
NiCr23Mo16AI |
ASTM B574/B 564 |
450℃ |
2.4610/UNS N06455/Alloy C4 |
NiMo16Cr16Ti |
ASTM B574/B 564 |
400℃ |
2.4602/UNS N06022/Alloy C22 |
NiCr21Mo14W |
ASTM B574/B 564 |
400℃ |
1.4571/AISI 316Ti |
X6CrNiMoTi17-12-2 |
DIN EN 10088-3/10272 |
400℃ |
1.4541/AISI 321 |
X6CrNiTi18-10 |
DIN EN 10088-3/10272 |
400℃ |
1.4539/AISI 904L |
X1NiCrMoCu25-20-5 |
DIN EN 10088-3/10272 |
400℃ |
1.4529/Alloy926 |
X1NiCrMoCu25-20-7 |
DIN EN 10088-3/10272 |
400℃ |
1.4429/AISI 316LN |
X2CrNiMoN17-13-3 |
DIN EN 10269/10272 |
400℃ |
1.4404/AISI 316L |
X2CrNiMo17-12-2 |
DIN EN 10269/10272 |
400℃ |
1.4923 |
X22CrMoV12-1 |
DIN EN 10269 |
400℃ |
1.7225 |
42CrMo4 |
DIN EN 10269 |
400℃ |
1.7709 |
21CrMoV5-7 |
DIN EN 10269 |
400℃ |
1.7258 |
24CrMo5 |
|
400℃ |
1.7219 |
26CrMo4 |
|
400℃ |
1.7218 |
25CrMo4 |
DIN EN 10269 |
400℃ |
1.4571 |
X6CrNiMoTi17-12-2 |
|
400℃ |
1.739 |
X15CrMo5-1 |
|
400℃ |
1.1133 |
20Mn5 |
|
400℃ |
description2