ASTM SS 1.4539|AISI 904L|UNS N08904 Khoom siv
HT PIPE yog ss 904L cov khoom siv nrog 15+ kev xa tawm. 904L stainless hlau muaj npib tsib xee (txog 25-30%), chromium (li 19-23%), thiab lwm yam khoom xyaw xws li molybdenum (4-5%) thiab tooj liab (1-2%) . N08904 muaj kev tiv thaiv zoo heev rau ntau yam kab mob corrosive xws li hydrochloric acid, sulfuric acid, phosphoric acid thiab chloride-muaj ib puag ncig. Nws yog ntau resistant rau pitting, crevice corrosion thiab kev nyuaj siab corrosion cracking (SCC) dua lwm yam stainless hlau xws li 316L los yog 317L.
1. SS 904L Cov Khoom Muag Khoom Muag Khoom Muag
- 904L Stainless Hlau Phaj
- Yeeb
- Fittings (lub luj tshib, tees, flanges)
- Round bars
2. AISI 904L Composition:
- Chromium (Cr): 19-23%
- Nickel (Ni): 23-28%
- Molybdenum (Mo): 4-5%
- Copper (Cu): 1-2%
- Cov pa roj carbon (C): Tsawg dua lossis sib npaug rau 0.020%
- Manganese (Mn): 2-2.5%
- Silicon (Si): Tsawg dua lossis sib npaug rau 1.0%
- Phosphorus (P): Tsawg dua lossis sib npaug rau 0.045%
- Sulfur (S): Tsawg dua lossis sib npaug rau 0.030%
3. Alloy SS 904L Khoom Khoom
Corrosion Resistance:
1.4539 stainless hlau yog resistant rau hydrochloric acid, sulfuric acid, phosphoric acid thiab chloride-muaj ib puag ncig.
1.4539 Steel Mechanical Properties:
- Yield zog: Ntau dua los yog sib npaug rau 240 MPa (Megapascals)
- Tensile zog: 530 - 740 MPa
- Elongation (ntawm 50mm gauge): Ntau dua lossis sib npaug li 40%
- Brinell hardness (HB): Tsawg dua lossis sib npaug rau 217
- Rockwell hardness (HRB): Tsawg dua lossis sib npaug rau 95
- Charpy V-hom cuam tshuam tus nqi:> 100 J (ntawm -196 degree)
- Elastic Modulus (Elastic Modulus): txog 200 GPa (Gigapascals)
- Poisson tus piv (Poisson's Ratio): txog 0.30
Kev Ua Haujlwm Kub Kub:
Kev khiav hauj lwm kub siab tshaj plaws: txog 450 degree (rau kev siv mus sij hawm ntev) thiab 870 degree (rau siv sij hawm luv luv)
904L Steel Nqe Ib Kg:
USD 4 txog USD 6 ib kg (lossis ntau dua) rau cov khoom siv raw (xws li daim hlau, cov ntawv, lossis cov tuav) yam tsis muaj kev ua haujlwm ntxiv.
4. Kev siv cov khoom siv SS904L
- Kev siv tshuaj: tshuaj reactors, kub exchangers, thiab pipelines siv los tsim chiv, tshuaj, thiab petrochemicals.
- Marine thiab offshore engineering: kev tsim khoom xws li cov khoom siv hluav taws xob, cov tso tsheb hlau luam, thiab cov kav dej.
- Pollution Control: manufacturing scrubbers thiab lwm yam khoom siv pa phem
- Kev lag luam roj thiab roj: cov khoom siv rau offshore platforms thiab refineries
5. Kev sib piv ntawm UNS N08904 cov khoom siv nrog lwm cov SS
- 904L vs. 316L: Alloy 904L muab kev tiv thaiv zoo dua nyob rau hauv ib puag ncig acidic thiab thaj chaw uas muaj cov tshuaj chloride corrosion. 316L feem ntau yog siv nyob rau hauv tsawg corrosive ib puag ncig.
- 904L vs. 317L: 904L muaj ntau dua nickel thiab molybdenum cov ntsiab lus rau txhim khu kev tiv thaiv rau sulfuric acid thiab chloride daws. Nws kuj tseem muaj kev tiv thaiv zoo dua rau intergranular corrosion tshaj 317L.
