Konpozisyon chimik ak pwopriyete mekanik nan 25mng
Kondisyon pou konpozisyon chimik, %
C: 0.22-0.27
Si: 0. 17-0. 37
Mn: 0. 70-1. 00
P: mwens pase oswa egal a 0. 025
S: mwens pase oswa egal a 0. 015
Eleman rezidyèl
Cu: mwens pase oswa egal a 0. 20
Cr: mwens pase oswa egal a 0. 25
Ni: mwens pase oswa egal a 0. 25
MO: mwens pase oswa egal a 0. 15
V: mwens pase oswa egal a 0. 08
Tretman chalè normalized: 880 degre -940 degre tanperati chanm
Kondisyon pwopriyete mekanik
Rupture fòs rm: 485-640 MPa
Sede fòs rel: pi gran pase oswa egal a 275MPa
Elongasyon nan kraze A: Longitudinal pi gran pase oswa egal a 20, transverse pi gran pase oswa egal a 18
Enpak enèji absòbe, (KV2/J): Longitudinal pi gran pase oswa egal a 40, transverse pi gran pase oswa egal a 27 (d pi gran pase oswa egal a 76 ak s pi gran pase oswa egal a 14 tib bezwen enpak tès)
Dite: HBW: 130-180, HV: 130-180
Tolerans pou dyamèt nominal deyò ak epesè miray nominal nan tib asye ak tiyo
| Metòd fabrikasyon |
Gwosè tiyo asye |
Tolerans | |||
| klas nòmal | segondè nivo | ||||
| Cho woule (sòti) tiyo asye |
Nominal dyamèt ekstèn d |
<57 |
±0.40 |
±0.30 |
|
|
57-325 |
S mwens pase oswa egal a 35 |
±0.75%D |
±0.50%D |
||
|
S>35 |
±1%D |
±0.75%D |
|||
|
>325-600 |
+1%d oswa +5, min -2 |
- |
|||
|
>600 |
+1%d oswa +7, min -2 |
- |
|||
|
Epesè nominal miray s |
Mwens pase oswa egal a 4. 0 |
±0.45 |
±0.35 |
||
|
>4.0-20 |
+12.5%S -10%S |
±10%S |
|||
|
>20 |
D<219 |
±10%S |
±7.5%S |
||
|
D pi gran pase oswa egal a 219 |
+12.5%S -10%S |
±10%S |
|||
| Cho tiyo asye elaji |
Nominal dyamèt ekstèn d |
tout |
±1%D |
±0.75%D |
|
|
Epesè nominal miray s |
tout |
+20%S -10%S |
+15%S -10%S |
||
| Fwad-trase (woule) tib asye |
Nominal dyamèt ekstèn d |
Mwens pase oswa egal a 25.4 |
±0.15 |
- |
|
|
>25.4-40 |
±0.20 |
- |
|||
|
>40-50 |
±0.25 |
- |
|||
|
>50-60 |
±0.30 |
- |
|||
|
>60 |
±0.5%D |
- |
|||
|
Epesè nominal miray s |
Mwens pase oswa egal a 3. 0 |
±0.3 |
±0.2 |
||
|
>3.0 |
±10%S |
±7.5%S |
|||
