347 347H Stainless hlau

General khoom

Alloy 347 yog ib tug stabilized, austenitic, chromium steel muaj columbium uas tso cai rau rau cov tshem tawm ntawm carbide nag lossis daus, thiab, thiaj li, intergranualr corrosion. Alloy 347 stabilized los ntawm cov ntxiv ntawm chromium thiab tantalum thiab muaj siab nkag thiab kev nyuaj siab kev sib tawg zog tshaj hlau 304 thiab 304L uas tej zaum kuj yuav siv tau rau tib qhov chaw uas sensitization thiab intergranualr xeb yog ntawm kev txhawj xeeb. Qhov sib ntxiv ntawm columbium kuj tso cai Alloy 347 kom muaj zoo kev xeb kuj, txawm superior rau cov hlau 321. 347H yog qhov ntau dua cov pa roj carbon muaj pes tsawg leeg hauv daim ntawv ntawm Alloy 347 thiab qha paub high school kub thiab nkag zog.

Specifications: UNS S34700 / S34709

Daim ntaub ntawv:

Alloy 347 nquag siv rau lub fabrication ntawm cov khoom, uas yuav tsum tau muab tso rau hauv qhov kev pab nyob rau hauv kev mob loj corrosive tej yam kev mob, thiab tseem yog ib qho mus rau lub roj av refining industries. Daim ntaub ntawv uas qhia siv kuj siv Alloy 347 muaj xws li:

1.High kub tshuaj dab
2.Heat exchanger hlab
3.High kub zog pab
4.High siab zog kav
5.Radiant superheaters
6.Boiler hlab
7.Heavy luag hauj lwm tso tshuab
8.General refinery piping

Standards:

1.ASTM / ASME: UNS S34700 / S34709
2.EURONORM: FeMi35Cr20Cu4Mo2
3.DIN: 2,4660
4.Offers zoo xws li cov kuj mus general, zuag qhia tag nrho xeb li Alloy 304
5.Used rau daim ntaub ntawv nyob qhov twg alloys xws li Alloy 304 yog lam tau lam ua rau intergranualr xeb
6 .Generally siv rau hnyav welded khoom uas tsis tau annealed thiab rau cov khoom uas yog ua ntawm 800 rau 150 ° F (427 tO 816 ° C)
7.Alloy 347 yog dua Alloy 321 rau aqueous thiab lwm yam tsawg kub kev kawm
8.Primarily siv nyob rau hauv kub chaw uas kuj mus sensitization yog tsim nyog, nyob rau hauv lem tiv thaiv intergranualr xeb ntawm qib qis
9.Susceptible rau kev nyuaj siab xeb ntes
10.Exhibits oxidation kuj zoo ib yam li tag nrho lwm cov 18-8 austenitic stainless steels

Corrosion Kuj:

Weldability

1.Austenitic stainless steels pom tau hais tias yuav tsum tau lub feem ntau weldable tawm ntawm tag nrho cov high hlau steels
2.Can yuav welded los ntawm tag nrho cov fusion thiab kuj Vuam dab
3.Annealing kub ntau yog 1800 mus rau 2000 ° F
4.May yuav nyuaj siab nyem annealed tsis pub dhau lub carbide nag lossis daus ntau ntawm 800 rau 1500 ° F tsis muaj kev txaus ntshai ntawm tom ntej intergranualr xeb
5.Cannot yuav tawv los ntawm tshav kub kev kho mob

Thaum tshav kub kub kho mob

Tshuaj khoom:

 

C

Kr

Mn

ni

P

S

si

Cb / Ta

347

0.08 max

min: 17,0
max: 20,0

2.0 max

min: 9.0
max: 13.0

0,04 max

0,30
max

0.75
max

min: 10 x C
max: 1.0

347H

min: 0,04
max: 0,10

min: 17,0
max: 20,0

2.0 max

min: 9.0
max: 13.0

0.03 max

0,30
max

0.75
max

min: 10 x C
max: 1.0

Neeg kho tshuab Properties:

Qib

Tensile zog ksi (MPa) min

Yield zog 0.2% ksi offset ksi (MPa) min

Elongation (% nyob rau hauv 50 hli) min

Hardness (Brinell) MAX

Hardness (Rockwell B) MAX

347 / 347H

75
(515)

30
(205)

40

201

95

Physical khoom:

Ceev
lbm/in3

Coefficient ntawm
Thermal Expansion (min/in)-°F

Thermal conductivity Btu / hr-ft- ° F

Cov Thaum tshav kub kub Btu / lb m  - ° F

Modules ntawm elasticity (annealed) 2 -psi

ntawm 68 ° F ntawm 68 - 212 ° F ntawm 68 - 1832 ° F 68-932 ° F ntawm 32 - 212 ° F nyob rau hauv tsis sib haum (E)
0,288 9.2 11,4 14,7 0,12 28 x 10 6