Kev sib piv ntawm ASTM A312 TP316 thiab TP316L kav
Kev sib piv ntawm ASTM A312 TP316 thiab TP316L kav
ASTM A312 TP316L yog qhov qis-carbon version ntawm TP316, qhov sib txawv tseem ceeb yog cov ntsiab lus carbon (ntau tshaj 0.03% vs. 0.08%). Tsawg-carbon TP316L zoo dua rau kev siv vuam vim nws tiv thaiv carbide nag lossis daus (sensitization) thiab txhim kho corrosion kuj. Txawm hais tias TP316 muaj zog tensile zog me ntsis / tawm lub zog vim nws cov ntsiab lus carbon ntau dua, ob qho tib si muaj kev tiv thaiv zoo heev rau kev xeb thiab chloride corrosion, ua tsaug rau muaj molybdenum. Rau welded tuab - ntu ntu, 316L raug pom zoo; thaum rau siab dav - cov ntawv siv zog qhov twg vuam tsis yog qhov tseem ceeb, 316 nyiam dua.
Cov khoom ntawm ASTM A312 TP316L cov khoom yog dab tsi?
A312 TP316L stainless hlau yog tsawg- carbon austenitic stainless hlau. A312 TP316L yog tsim los nrog lub siab - zoo muaj pes tsawg leeg ntawm nickel, chromium, thiab molybdenum, ua rau nws haum rau ntau yam lag luam. Qhov no muab qib ntawm cov khoom zoo heev corrosion kuj thiab oxidation kuj.
ASTM A312 TP316 thiab TP316L xa mus rau 316 thiab 316L stainless hlau, feem. Lub prefix "TP" qhia txog "hom" ntawm stainless hlau. TP316 lossis TP316L cov kav dej tuaj yeem ua rau hauv cov kav dej tsis sib haum lossis longitudinally welded, nrog pob tw -welded lossis threaded kawg. TP316 yog tsim los ntawm kev ntxiv molybdenum rau classic "18-8" (TP304) stainless hlau los txhim kho nws cov kev tiv thaiv rau pitting corrosion nyob rau hauv ib puag ncig chloride. TP316L yog cov pa roj carbon tsawg ntawm TP316; nws cov ntsiab lus qis carbon txhim kho cov khoom rhiab heev, yog li txhim kho nws txoj kev tiv thaiv vuam corrosion.
ASTM A312 TP316 thiab TP316L raug xaiv los ua UNS S31600 thiab UNS S31603, raws li. Txawm hais tias kim dua, TP316 / TP316L kav dej muaj kev tiv thaiv corrosion ntau dua li TP304 / TP304L kav. Lawv tuaj yeem siv rau hauv cov kav dej rau ntau yam txheej txheem tshuaj corrosive, nrog rau kev lag luam xws li inks, rayon, cov tshuaj yees duab, ntawv, textiles, tshuaj dawb, thiab roj hmab.
Tshuaj muaj pes tsawg leeg ntawm ASTM A312 TP316 thiab TP316L
| Element | Kev sib xyaw,% TIAB SA 316 |
Kev sib xyaw,% TP 316 L |
|---|---|---|
| C | Tsawg dua lossis sib npaug li 0.08 | Tsawg dua lossis sib npaug li 0.035 |
| Mn | Tsawg dua lossis sib npaug li 2.00 | Tsawg dua lossis sib npaug li 2.00 |
| P | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.045 |
| S | Tsawg dua lossis sib npaug li 0.030 | Tsawg dua lossis sib npaug li 0.030 |
| Si | Tsawg dua lossis sib npaug li 1.00 | Tsawg dua lossis sib npaug li 1.00 |
| Cr | 16.0-18.0 | 16.0-18.0 |
| Ni | 10.0-14.0 | 10.0-14.0 |
| Mo | 2.00-3.00 | 2.00-3.00 |
Mechanical Properties ntawm ASTM A312 TP316 thiab TP316L
| Tensile Requirements | TIAB SA 316 | TP 316 L |
|---|---|---|
| Tensile zog min. MPa [ksi] |
515 [75] |
485 [70] |
| Yield zog min. MPa [ksi] |
205 [30] |
170 [25] |
| Elongation hauv 2", min, % (*L) |
35 | 35 |
| Elongation hauv 2", min, %(*T) |
25 | 25 |
Vuam & Corrosion:
TP 316:Cov ntsiab lus carbon siab tuaj yeem ua rau tsim cov carbides (sensitization) ntawm cov ciam teb thaum lub sij hawm vuam, yog li txo qhov corrosion kuj ntawm tshav kub - cuam tshuam cheeb tsam.
Qauv TSIS MUAJ: TP316LCov ntsiab lus carbon tsawg tiv thaiv qhov kev xav no, yog li muab kev tiv thaiv zoo heev rau intergranular corrosion tom qab vuam.
Kev tsim khoom thiab kev kho cua sov
Seamless steel kav tsim los ntawm ASTM A312 TP316 / TP316L steel yuav tsum tau tsim yam tsis muaj vuam ntawm txhua theem ntawm kev tsim khoom. Welded kav yuav tsum tau tsim siv cov txheej txheem vuam tsis siv neeg, thiab tsis muaj vuam hlau yuav tsum tau ntxiv thaum vuam. TP316 / TP316L steel kav yuav tsum tau txais kev kho mob, uas suav nrog cua sov cov yeeb nkab thiab tuav nws ntawm qhov kub tsis qis dua 1040℃(1900℃F) rau lub sijhawm txaus kom tso cai rau tag nrho cov chromium carbides kom ua tiav austenitized / yaj. Qhov no yuav tsum tau ua raws li cov dej txias los yog lwm txoj kev ua kom txias sai kom tsis muaj carbide nag lossis daus ntawm cov ciam teb. Tsis tas li ntawd, vim cov ntsiab lus qis ntawm TP316L, intergranular carbide nag lossis daus, ua rau TP316L tsis tshua muaj chromium carbide nag lossis daus piv rau TP316. Qhov no tuaj yeem ua rau muaj kev cuam tshuam tsawg, yog li muaj txiaj ntsig zoo rau vuam, nplaim taws txiav, thiab lwm yam haujlwm kub ua haujlwm.
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