21crmov5-7 Bolts
1.7709
21CrMoV5-7 Bolts are fasteners manufactured from alloy derived from carbon steel with additions of chromium and molybdenum. 21CrMoV5-7 Bolts have a tendency to withstand high temperature service applications. TorqBolt is an eminent 21crmov5-7 Alloy Steel fastener supplier in India.
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21crmov5-7 Bolts Properties
21crmov5-7 Bolts Chemical Requirements
| Material designation | Chemical composition, % by mass | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | C | Si | Mn | P max. |
S max. |
Al tot | B | Cr | Mo | Ni | V | Others |
| 21CrMoV5-7 | 1.7709 | 0,17 to 0,25 | ≤ 0,40 | 0,40 to 0,80 | 0.025 | 0.030 | ≤ 0,030 | - | 1,20 to 1,50 | 0,55 to 0,80 | ≤ 0,60 | 0,20 to 0,35 | - |
21crmov5-7 Bolts Mechanical Requirements
Mechanical properties at Room Temperature
Mechanical properties at room temperature for delivery conditions normally applied for further processing
| Material designation | Heat treatment condition a,b | Hardness HBW max. |
Tensile strength Rm MPa max. |
Reduction in area Z % min. |
|
|---|---|---|---|---|---|
| Name | Number | ||||
| 21CrMoV5-7 | 1.7709 | +S | 255 | - | - |
| +AC | 229 | - | - | ||
Mechanical properties at room temperature and at 20 °C of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC b
| Material designation | Heat treatment condition a |
Diameter c | Proof strength | Tensile strength | Elongation after fracture | Reduction in area | Impact energy (ISO-V) at 20°C | |
|---|---|---|---|---|---|---|---|---|
| Name | Number | |||||||
| d mm |
Rp0,2 MPa min. |
Rm MPa |
A % min. |
Z % min. |
KV2 J min. |
|||
| 21CrMoV5-7 | 1.7709 | +QT | d ≤ 160 | 550 | 700 to 850 | 16 | 60 | 63 |
EN 10269 Proof strength
Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d
| Material designation | Heat treatment condition a | Diameter e d mm |
Minimum 0,2 %-proof strength Rp0,2 in MPa at a temperature (in °C) of: | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | ||
| 21CrMoV5-7 | 1.7709 | +QT | d ≤ 160 | 542*) | 530 | 515*) | 500 | 480*) | 460 | 435*) | 410 | 380 | 350 | - | - | - |