1.4404 vs 316 Stainless hlau: Puas yog lawv tib yam?

Thaum muas cov ntaub ntawv stainless hlau, ntau tus neeg yuav khoom nquag nug: "Puas yog 1.4404 tib yam li 316 stainless hlau?" Hauv luv luv, cov lus teb tsis yog qhov tseeb "yog." Txawm hais tias ob qho tib si muaj kev sib raug zoo, kev nkag siab zoo txog qhov sib txawv ntawm lawv yog qhov tseem ceeb rau kev txiav txim siab kev yuav khoom, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas muaj kev tiv thaiv corrosion thiab vuam txheej txheem.

 

1.4404 Stainless hlau yog dab tsi?

1.4404 stainless hlau, feem ntau hu ua 316L, yog qis-carbon, molybdenum- alloyed austenitic stainless hlau. Nws muaj corrosion kuj zoo heev, tshwj xeeb tshaj yog tawm tsam pitting nyob rau hauv ib puag ncig chloride, thiab yog heev weldable yam tsis muaj intergranular corrosion. Kev siv tseem ceeb suav nrog kev ua tshuaj lom neeg, tshuaj, chaw nyob hauv hiav txwv, thiab cov khoom siv ua zaub mov.

 

1.4404 sib npaug li cas?

316L stainless hlau yog qib stainless hlau zoo heev rau corrosion kuj. Qib no yog sau ua 1.4404 lossis X2CrNiMo17-12-2 raws li EN tus qauv thiab nws raug sau ua UNS S31603 raws li UNS tus qauv.

 

Dab tsi yog 316 Stainless Hlau?

316 stainless hlau yog cov hwm zoo, molybdenum-alloyed "marine- qib" stainless hlau paub txog kev tiv thaiv corrosion zoo tshaj, tshwj xeeb tshaj yog tawm tsam chlorides thiab hnyav hnyav. Muaj 16-18% chromium, 10-14% npib tsib xee, thiab 2-3% molybdenum, nws muaj zog thiab ruaj khov dua li 304 stainless, zoo tagnrho rau marine, tshuaj, thiab kev siv tshuaj kho mob.

 

1.4404 vs 316 Stainless hlau: Tshuaj lom neeg sib piv (% Max)

Element	EN 1.4404 (X2CrNiMo17-12-2)	AISI 316L (S31603)
Cov pa roj carbon (C)	0.030%	0.030%
Chromium (Cr)	16.5 – 18.5%	16.0 – 18.0%
Nickel (Ni)	10.0 – 13.0%	10.0 – 14.0%
Molybdenum (hli)	2.0 – 2.5%	2.0 – 3.0%
Manganese (Mn)	2.00%	2.00%
Silicon (Si)	1.00%	0.75% (1.00% rau qee daim ntawv)
Phosphorus (P)	0.045%	0.045%
Sulfur (S)	0.015% (rau raj)	0.030%
Nitrogen (N)	0.11%	0.10%

 

1.4404 vs 316 Stainless Hlau: Mechanical Properties (ntawm Chav Kub, Annealed Condition)

Khoom	TS EN 1.4404	AISI 316L
Tensile zog	500-700 MPa	485 MPa (70 ksi) min
Yield zog	200 MPa min	170 MPa (25 ksi) min
Elongation	40% min (Longitudinal)	35% - 40% min
Hardness (Brinell - HBW)	215 max	192 max
Hardness (Rockwell - HRB)	-	90 max

 

Vim li cas qhov "L" lossis "1.4404" yog qhov tseem ceeb rau kev vuam?

Teb: Nws sawv rau Low Carbon (tsawg dua lossis sib npaug li 0.03%). Thaum vuam tus qauv 316 (1.4401), "sensitization" tuaj yeem tshwm sim, qhov twg chromium carbides precipitate ntawm cov ciam teb, ua rau intergranular corrosion. Vim tias 1.4404 muaj cov pa roj carbon tsawg, nws tiv thaiv cov nag lossis daus, tso cai rau cov khoom siv rau hauv qhov "raws li -welded" yam tsis tas yuav tsum tau tom qab-weld kho cua sov.

 

1.4404 puas tuaj yeem siv rau hauv kev lag luam khoom noj thiab tshuaj?

1.4404/316L yog tus qauv kev xaiv rau kev lag luam tshuaj thiab biotech vim nws cov corrosion kuj zoo heev rau CIP (Clean-hauv-Place) chemicals thiab nws muaj peev xwm coj tau siab - polish finish (Ra <0.4μm), uas tiv thaiv kab mob loj hlob.

 

GNEE 1.4404 (AISI 316L) steel Specifications

Yam khoom	Txheej txheem tsim khoom / tiav	Dimensional Range (OD / Thickness)	Ntev / Dav / Nta
Seamless Yeeb Nkab	Cold Drawn / Txias Rolled	OD: 6mm-630mm WT: 0.5mm-50mm	Ntev: 6m, 12m, lossis Custom. 100% Eddy Current & Hydro- kuaj.
Welded yeeb nkab	EFW, TIG, High-Frequency (HF)	OD: 10mm-2000mm WT: 0.5mm-40mm	Loj diameters muaj; Weld hlaws tshem tawm & X-ray kuaj.
Tube huv si	Mechanical lossis Electro-Polished	Roughness: Ra <0.4 μm lossis 0.8 μm	Khoom noj khoom haus / Pharma qib; Bright Annealed (BA) nto.
Kub Exchanger & U-Bent Tube	Precision Drawing + Kev ntxhov siab	Txuj: Ib TEMA / Drawing WT: ± 0.05 hli Precision	Ntev: Txog 24 Meters; U- khoov kho cua sov suav nrog.
Cold Rolled Sheet/Plate	Txias Rolled (2B, BA, No.4, Daim iav)	Thickness: 0.3mm-6.0 hli	Dav: 1000, 1219, 1500 mm; Kev tiv thaiv PVC zaj duab xis muaj.
Kub Rolled Heavy Phaj	Kub Rolled (No.1, Pickled)	Thickness: 3.0mm-120mm	Dav: 1500, 2000, 2500 mm; Plasma / Laser txiav muaj.
Stainless Hlau Coils	Txias los yog Kub Rolled	Thickness: 0.3mm-16mm	Dav: 600mm - 2000mm; Slitting & Leveling Services.