Abubuwan Bukatun Haɗin Sinadarai %
C: ≤0.30
Tsawon lokaci: 0.29-1.06
P: ≤0.025
S: ≤0.025
ku: ≥0.10
Ni: ≤0.40
C: ≤0.30
ku: ≤0.40
V: ≤0.08
Nb: ≤0.02
Mo: ≤0.12
*Maganese abun ciki na iya ƙara da 0.05% ga kowane 0.01% raguwa a cikin carbon abun ciki har zuwa 1.35%.
** Abubuwan da ke cikin Niobium, bisa yarjejeniya, ana iya ƙarawa har zuwa 0.05% don nazarin narkewa da 0.06% don ƙididdigar samfurin da aka gama.
Bukatun maganin zafi:
1. Daidaita sama da 815°C.
2. Ka daidaita sama da 815°C, sannan ka huce.
3. Zafin da aka samu tsakanin 845 da 945°C, sannan a sanyaya shi a cikin tanderu sama da 845°C (don bututun marasa sumul kawai).
4. Machined sa'an nan kuma fushi kamar yadda a sama Point 3.
5. Ya taurare sannan yayi zafi sama da 815°C.
Bukatun aikin injina:
Ƙarfin haɓaka: ≥240Mpa
Ƙarfin ƙarfi: ≥415Mpa
Tsawaitawa:
| Misali | A333 GR.6 | |
| A tsaye | Canza | |
| Mafi ƙarancin ƙima na daidaitaccen madauwarisamfurin ko ƙaramin sikeli tare da tazarar alama na 4D | 22 | 12 |
| Samfuran rectangular tare da kaurin bango na 5/16 in. (7.94 mm) da mafi girma, da duk ƙananan samfuran da aka gwada a cikicikakken sashin giciye a 2 in. (50 mm)alamomi | 30 | 16.5 |
| Samfuran rectangular har zuwa 5/16 in. (7.94 mm) kaurin bango a 2 in. (50 mm) nisa mai alama (faɗin samfurin 1/2 in., 12.7 mm) | A | A |
Bada izinin raguwa na 1.5% a cikin tsayin tsayin daka da raguwar 1.0% a cikin haɓakar juyawa ga kowane 1/32 in. (0.79 mm) na kauri na bango har zuwa 5/16 in. (7.94 mm) daga ƙimar elongation da aka jera a sama.
Gwajin Tasiri
Gwajin zafin jiki: -45°C
Lokacin da aka yi amfani da ƙananan samfuran tasirin Charpy kuma faɗin ƙimar samfurin bai wuce 80% na ainihin kauri na kayan ba, yakamata a yi amfani da ƙaramin zafin gwajin tasiri kamar yadda aka ƙididdige shi a cikin Tebu 6 na ƙayyadaddun ASTM A333.
| Misali, mm | Matsakaicin matsakaici na samfurori uku | Mafi ƙarancin ƙima na kane of samfurori guda uku |
| 10 × 10 | 18 | 14 |
| 10 × 7.5 | 14 | 11 |
| 10 × 6.67 | 12 | 9 |
| 10 × 5 | 9 | 7 |
| 10 × 3.33 | 7 | 4 |
| 10 × 2.5 | 5 | 4 |
Ya kamata a gwada bututun ƙarfe na ruwa ko kuma ba a gwada su ba (eddy current ko ultrasonic) akan reshe-da-reshe.
Haƙuri na waje diamita na karfe bututu:
| Diamita na Waje, mm | tabbatacce haƙuri, mm | rashin haƙuri, mm |
| 10.3-48.3 | 0.4 | 0.4 |
| 48.3＜D≤114.3 | 0.8 | 0.8 |
| 114.3＜D≤219.10 | 1.6 | 0.8 |
| 219.1＜D≤457.2 | 2.4 | 0.8 |
| 457.2＜D≤660 | 3.2 | 0.8 |
| 660＜Saukewa: D864 | 4.0 | 0.8 |
| 864＜D≤1219 | 4.8 | 0.8 |
Juriyar kaurin bango na bututun ƙarfe:
Kowane batu ba zai zama ƙasa da 12.5% na kauri na bango ba.Idan an ba da oda mafi ƙarancin kauri na bango, babu maki da zai zama ƙasa da kaurin bangon da ake buƙata.
Lokacin aikawa: Fabrairu-22-2024