25crmo4 Screws
1.7218, G41300
25crmo4 Screws are fasteners manufactured from alloy derived from carbon steel with additions of chromium and molybdenum. 25crmo4 Screws have a tendency to withstand high temperature service applications. TorqBolt is an eminent 25crmo4 Alloy Steel fastener supplier in India.
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25Crmo4 Bolts 25Crmo4 Fasteners 25Crmo4 Forgings 25Crmo4 Nuts 25Crmo4 Screws 25Crmo4 Studs 25Crmo4 Threaded Rod 25Crmo4 Washers
25crmo4 Screws Properties
25crmo4 Screws 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 |
| 25CrMo4 | 1.7218 | 0,22 to 0,29 | ≤ 0,40 | 0,60 to 0,90 | 0.025 | 0.035 | - | - | 0,90 to 1,20 | 0,15 to 0,30 | - | - | - |
25crmo4 Screws 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 | ||||
| 25CrMo4 | 1.7218 | +S | 255 | - | - |
| +A | 212 | - | - | ||
| +AC | - | 580 | 59 | ||
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. |
|||
| 25CrMo4 | 1.7218 | +QT | d ≤ 100 | 440 | 600 to 750 | 18 | 60 | 60 |
| 100< di 150 | 420 | 600 to 750 | 18 | 60 | 45 | |||
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 | ||
| 25CrMo4 | 1.7218 | +QT | d ≤ 100 | 435*) | 428*) | 420*) | 412 | 392 | 363 | 333 | 304 | 275 | 235 | - | - | - |
| 100 < d ≤ 150 | 414*) | 403*) | 393*) | 382 | 372 | 344 | 324 | 294 | 265 | 226 | - | - | - | |||
EN 10269 Impact Energy
Minimum impact energy (longitudinal direction) at low temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC b
| Material designation | Heat treatment condition a | Diameter e d mm |
Minimum impact energy KV2 in J c (ISO-V test piece) at a test temperature in °C of: |
||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | -270 | -196 | -160 | -140 | -120 | -110 | -100 | -90 | -80 | -70 | -60 | -50 | -40 | -20 | 0 | +20 | ||
| 25CrMo4 | 1.7218 | +QT | d ≤ 60 | - | - | - | - | - | - | - | - | - | - | 40 | 40 | 45 | 50 | - | 60 |
| 60 < d ≤ 100 | - | - | - | - | - | - | - | - | - | - | - | 40 | 40 | 50 | - | 60 | |||