Kimyoviy tarkibi va 25mngning mexanik xususiyatlari
Kimyoviy tarkibiy talablar,%
C: 0.22-0.27
Si: {0}}. {1}}. 37
Mn: 0. 70-1. {2}}}
P: 0 dan kam yoki teng}. 025
S: 0 dan kam yoki teng}. 015
Qoldiq elementlar
Cu: 0 dan kam yoki unga teng
CR: 0 dan kam yoki unga teng
Ni: 0 dan kam yoki unga teng
Mo: 0 dan kam yoki unga teng
V: 0 dan kam yoki teng}. 08
Issiqlikni davolash Onlaynlashtirildi: 880 daraja -940 darajasi darajasi
Mexanik mulkka bo'lgan talablar
TENSILE kuchlari RM: 485-640 MPa
Homiy kuch Rel: 275mpa dan katta yoki teng
Burilishda cho'zish a
Ta'sis so'rilgan energiya (kv2 / j): uzunligi 40 dan katta yoki unga teng yoki 14 va undan katta yoki 14 ga teng yoki 14 ga teng yoki undan katta yoki unga teng yoki unga teng yoki unga teng yoki unga tenglashtirish kerak bo'lgan 76 va undan katta yoki unga teng yoki teng bo'lgan 76 va undan yuqori darajaga teng yoki unga teng yoki unga teng yoki teng bo'lgan yoki unga teng yoki teng bo'lgan 76 va undan yuqori darajaga teng bo'lgan
Qattiqlik: HBW: 130-180, HV: {1}}
Nominal diametri tashqi diametri va po'lat naychalar va quvurlarning nominal devorining qalinligi
| Ishlab chiqarish usuli |
Po'lat quvur hajmi |
Bag'rikenglik | |||
| normal daraja | yuqori daraja | ||||
| Issiq rulon (ekstroded) po'lat quvur |
Nominal tashqi diametri d |
<57 |
±0.40 |
±0.30 |
|
|
57-325 |
S 35 dan kam yoki teng |
±0.75%D |
±0.50%D |
||
|
S>35 |
±1%D |
±0.75%D |
|||
|
>325-600 |
+1% d yoki +5 metr min -2 |
- |
|||
|
>600 |
+1% d yoki +7 metr min -2 |
- |
|||
|
Nominal devor qalinligi |
4 dan kam yoki teng. 0 |
±0.45 |
±0.35 |
||
|
>4.0-20 |
+12.5%S -10%S |
±10%S |
|||
|
>20 |
D<219 |
±10%S |
±7.5%S |
||
|
D 219 dan katta yoki teng |
+12.5%S -10%S |
±10%S |
|||
| Issiq kengaytirilgan po'lat quvur |
Nominal tashqi diametri d |
hamma |
±1%D |
±0.75%D |
|
|
Nominal devor qalinligi |
hamma |
+20%S -10%S |
+15%S -10%S |
||
| Sovuq naycha (o'ralgan) po'lat naychalar |
Nominal tashqi diametri d |
25.4 dan kam yoki unga teng |
±0.15 |
- |
|
|
>25.4-40 |
±0.20 |
- |
|||
|
>40-50 |
±0.25 |
- |
|||
|
>50-60 |
±0.30 |
- |
|||
|
>60 |
±0.5%D |
- |
|||
|
Nominal devor qalinligi |
3 dan kam yoki teng. 0 |
±0.3 |
±0.2 |
||
|
>3.0 |
±10%S |
±7.5%S |
|||
