Qhov no yog ib qho kev nug ntau hauv mechanical engineering, manufacturing, thiab import/export.
Tus qauv German steel St52-3 (raws li qub DIN 17100 tus qauv, tam sim no hloov pauv) yog qhov sib npaug zoo tshaj plaws rau Suav cov khoom siv hauv tsev Q345B raws li GB / T 1591 tus qauv.
Nov yog cov ncauj lus kom ntxaws:
Thawj qhov sib npaug: Q345B (GB / T 1591)
Qhov no yog qhov kev hloov pauv ncaj qha thiab dav lees txais.
Yog vim li cas nws yog match:
Lub zog:Ob leeg muaj qhov tsawg kawg nkaus tawm lub zog ntawm 345 MPa (≈ 355 MPa rau St52-3, lub "52" qhia qhov tsawg kawg nkaus tensile lub zog ntawm 510-680 MPa, uas Q345B kuj sib ntsib).
Daim ntawv thov:Ob leeg yog qhov dav dav -lub hom phiaj qis- alloy siab- lub zog steels siv rau cov welded, bolted, thiab riveted lug nyob rau hauv lub tsev, txuas hniav, tsheb, thiab machinery.
Qib Zoo:Qhov "3" nyob rau hauv St52-3 txhais tau hais tias muaj kev cuam tshuam rau qhov hnyav ntawm chav tsev kub (+20℃). Q345B lav qhov cuam tshuam rau qhov hnyav ntawm +20℃ib yam nkaus, ua rau nws qhov kev sib tw qib zoo.
Chemical Composition & Manufacturing Txheej Txheem:Cov chemistry (C, Si, Mn, thiab lwm yam) thiab cov txheej txheem dov raug zoo sib xws.
Lus Cim Tseem Ceeb ntawm German Standard Update
Cov qub DIN 17100 tus qauv (nrog cov npe xws li St37, St44, St52-3) tau hloov los ntawm EN 10025-2. Cov niaj hnub European sib npaug ntawm St52-3 yog:
S355 JR(EN 10025-2)
S=Cov qauv hlau
355=Yam tsawg kawg nkaus tawm lub zog (MPa)
J=Impact toughness ntawm +20 degree
R=Rolled (raws li -xa khoom)
Yog li, Q345B kuj yog qhov sib npaug rau S355JR.
Tuam Tshoj Standard Alternatives
Nyob ntawm cov khoom tshwj xeeb thiab cov qauv siv, koj kuj yuav pom:
Q355B (GB/T 1591-2018):
Qhov no yog qhov kev xaiv tshiab tshaj plaws uas tau hloov pauv Q345B hauv kev hloov kho 2018 version ntawm GB / T 1591, ua raws cov kev sib tw npe thoob ntiaj teb (siv cov txiaj ntsig muaj zog 355). Hauv cov ntsiab lus siv tau, Q355B yog tib yam li Q345B qub. Yog tias koj tab tom nrhiav cov khoom tshiab, koj yuav ntsib Q355B.
Lwm Qib Q345/Q355 (Ua tib zoo nrog cov lus tom qab):
Q345A / Q355A:Cov khoom qis dua, tsis muaj kev pov hwm cuam tshuam kev sim. Tsis sib npaug.
Q345C / Q355C:Guaranteed cuam tshuam toughness ntawm 0 degree. Qib siab dua, tuaj yeem siv tau tab sis feem ntau kim dua.
Q345D / Q355D:Guaranteed cuam tshuam toughness ntawm -20 degree. Qib siab dua.
Q345E / Q355E:Guaranteed cuam tshuam toughness ntawm -40 degree. Qib siab dua.
Cov lus xaus
| German Standard (Kub) | Niaj hnub nimno EU Standard (EN) | Suav teb sib npaug (GB / T) | Cov Khoom Tseem Ceeb (Yield / Impact) |
|---|---|---|---|
| St52-3(DIN 17100) | S355 JR(EN 10025-2) | Q345B(Cov laus GB/T 1591) | YS Ntau dua lossis sib npaug rau 345 MPa, Impact @ +20 degree |
| St52-3(DIN 17100) | S355 JR(EN 10025-2) | Q355B(GB/T 1591-2018) | YS Ntau dua lossis sib npaug rau 355 MPa, Impact @ +20 degree |
Kev pom zoo rau Sourcing/Technical Drawing
Thawj Xaiv:Qhia meej Q355B (los yog Q345B) raws li GB/T 1591. Qhov no yog tus qauv, tus nqi - zoo sib npaug.
Daim ntawv thov tseem ceeb:Yog tias cov khoom yuav tsum muaj cov khoom tshwj xeeb tshaj li tus qauv yooj yim (xws li kev tswj hwm nruj dua ntawm cov khoom sib xyaw, cov khoom siv tuab, lossis kev kho cua sov tshwj xeeb), nws yog ib qho tseem ceeb rau kev sib piv cov ncauj lus kom ntxaws chemical muaj pes tsawg leeg thiab cov khoom vaj khoom tsev ntawm cov txheej txheem kev yuav khoom thiab cov hom phiaj (xws li EN 10025-2 S355JR).
Kev sib txuas lus:Thaum hais lus nrog Suav steel mills lossis cov chaw muag khoom, siv "Q355B" yog lub sijhawm niaj hnub thiab tsis meej. Koj tuaj yeem ntxiv "sib npaug rau German St52-3 lossis European S355JR" kom pom tseeb.
Hauv kev xaus, rau feem ntau ntawm cov qauv kev siv, Q355B (yav dhau los Q345B) yog qhov tseeb thiab sib npaug hauv Suav cov khoom siv rau St52-3.