CLASSIFICATION THIAB Symbols ntawm JIS G3444 steel kav
JIS G3444 raj yuav tsum tau muab faib ua tsib qib, thiab cov cim ntawm qib thiab kev tsim khoom yuav tsum tau muab raws li hauv qab no.
| Symbol ntawm Qib | Lub cim ntawm Kev Tsim Khoom | ||
| Tube Manufacturing Method | Txoj kev ua tiav | Kos npe | |
| TIAB SA 290 |
Seamless: S Hluav taws xob tsis kam vuam: E Lub taub hau welded: B Tsis siv neeg arc welded: A |
Kub tiav: H Txias tiav: C Raws li hluav taws xob kuj welded: G |
Kub tiav seamless steel raj: -S-H Cold tiav seamless steel raj: -S-C Raws li hluav taws xob kuj welded steel raj: -E-G Kub tiav ERW steel raj: -E-H Txias tiav ERW steel raj: -E-C Butt welded steel raj: -B Tsis siv neeg arc welded steel raj: -A |
| TSI 400 | |||
| TIAB SA 490 | |||
| TSI 500 | |||
| TIAB SA 540 | |||
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1. Qhov ntev yuav tsum tau cim los ntawm sab nraud txoj kab uas hla thiab phab ntsa thickness. 2. Tus neeg tsim khoom lub npe lossis nws lub npe cim npe3. Cov cim qhia txog hom txheej txheej (thaum siv cov ntawv coated steel lossis coated steel strip). Cov ntawv luv rau lub cim no yuav tsum yog raws li kev pom zoo ntawm tus neeg yuav khoom thiab cov chaw tsim khoom. |
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CHEMICAL COMPOSITION NTAWM JIS G3444
Cov raj yuav tsum tau kuaj xyuas raws li tus qauv, thiab cov txiaj ntsig kev ntsuas cua sov yuav tsum ua raws li cov lus hauv qab no. Thaum tus neeg siv khoom thov kev tshuaj xyuas cov khoom, lub raj yuav tsum raug kuaj raws li tus qauv thiab cov khoom lag luam tsom xam qhov tseem ceeb yuav tsum ua kom tau raws li cov txheej txheem hauv Table nyob rau hauv qhov kam rau ua tau teev tseg hauv Table ntawm JIS G 0321.
| Symbol ntawm Qib | C | Si | Mn | P | S |
| JIS G3444 STK 290 | – | – | – | 0.050 max. | 0.050 max. |
| JIS G3444 STK 400 | 0.25 max. | – | – | 0.040 max. | 0.040 max. |
| JIS G3444 STK 490 | 0.18 max. | 0.55 max. | 1.65 max. | 0.035 max. | 0.035 max. |
| JIS G3444 STK 500 | 0.24 max. | 0.35 max. | 0.30–1.30 dr hab | 0.040 max. | 0.040 max. |
| JIS G3444 STK 540 | 0.23 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. |
| Nco tseg: 1. Yog tias tsim nyog, lwm cov ntsiab lus alloy tshaj cov uas tau muab rau hauv cov lus no tuaj yeem raug ntxiv. 2. Rau STK540, cov tshuaj muaj pes tsawg leeg ntawm cov hlab ntawm phab ntsa thickness tshaj 12.5 hli tuaj yeem pom zoo los ntawm tus neeg yuav khoom thiab cov chaw tsim khoom. |
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MECHANICAL PROPERTIES NTAWM JIS G3444
- Tensile Strength thiab Yield Point lossis Pov Thawj Stress
Txhawm rau kom ntseeg tau tias cov raj steel zoo, lawv yuav tsum tau ua nrog cov qib siab -cov ntawv hlau zoo lossis cov hlua. Cov ntaub ntawv no yuav tsum tau kuaj xyuas kom paub meej tias lawv lub zog tensile, qhov taw tes tawm los, thiab pov thawj kev ntxhov siab. Lub zog tensile hauv cheeb tsam weld kuj yog ib qho tseem ceeb, thiab qhov no yuav tsum tau lees paub thiab. Txawm li cas los xij, yog tias tus neeg yuav khoom pom zoo, qhov kev sim rau lub zog tensile hauv qhov vuam yuav raug tshem tawm. Tag nrho cov yam tseem ceeb no yog qhov tseem ceeb hauv kev ua kom ntseeg tau tias cov raj steel yog qhov zoo tshaj plaws thiab yuav muaj peev xwm tiv taus kev ntxhov siab lossis qhov hnyav uas tau muab tso rau ntawm lawv.
| Symbol ntawm Qib |
Tensile zog N / hli 2 |
Yield Point los yog Pov Thawj Kev Nyuaj Siab N / hli 2 |
Weld Tensile N / hli 2 |
Flattening Resistance Strength | Kho tau yooj yim | |
| Qhov nrug nruab nrab ntawm cov phaj tiaj tiaj (H) | Bending Angle, a) | Hauv Radius | ||||
| Siv tau sab nraud | ||||||
| Tag Nrho Sab Nraud | Tag Nrho Sab Nraud | Tag Nrho Sab Nraud | Tag Nrho Sab Nraud | 50mm los yog qis dua | ||
| JIS G3444 STK 290 | 290 nqi. | – | 290 nqi. | 2/3D | 90 degree | 6D |
| JIS G3444 STK 400 | 400 min. | 235 nqi. | 400 min. | 2/3D | 90 degree | 6D |
| JIS G3444 STK 490 | 490 nqi. | 315 min. | 490 nqi. | 7/8D | 90 degree | 6D |
| JIS G3444 STK 500 | 500 min. | 355 nqi. | 500 min. | 7/8D | 90 degree | 6D |
| JIS G3444 STK 540 | 540 nqi. | 390 nqi. | 540 nqi. | 7/8D | 90 degree | 6D |
| CEEB TOOM 1 Hauv cov lus no, D sawv cev rau sab nraud ntawm lub raj. CEEB TOOM 2 1 N/mm 2=1 MPa Nco tseg a) Lub kaum sab xis yuav tsum ntsuas los ntawm qhov pib ntawm qhov khoov. |
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- Kev sib tw
Txoj kev kuaj flattening yog ib txoj hauv kev kuaj xyuas qhov tsis zoo los yog tawg hauv seamless steel hlab, hluav taws xob tsis kam welded steel hlab, lossis pob tw welded steel hlab. Qhov kev ntsuam xyuas yog muab lub raj ntawm ob daim hlau thiab siv lub siab rau lub phaj sab saum toj. Qhov kev ncua deb ntawm daim hlau yog tswj xyuas kom paub tseeb tias qhov kev ntsuam xyuas yog qhov tseeb. Kev ntsuas flattening yog ib feem tseem ceeb ntawm kev tswj xyuas zoo rau cov raj steel, thiab nws pab kom ntseeg tau tias cov raj tsis muaj qhov tsis xws luag.
- Kho tau
Cov raj uas muaj 50 hli los yog nyob rau hauv sab nraud txoj kab uas hla tuaj yeem raug teev rau lawv txoj kev khoov kom tsis txhob muaj peev xwm ua kom flattened. Lwm cov raj yuav tsum raug kuaj kom khoov tau los ntawm tus qauv, thiab daim ntawv xeem yuav tsum tsis txhob muaj qhov tsis zoo lossis tawg. Lub kaum sab xis txais tau thiab lub vojvoog sab hauv ntawm dabtsi yog khoov tau teev nyob rau hauv cov lus saum toj no. Qhov no ua kom cov raj ua tau raws li cov qauv kev nyab xeeb tsim nyog thiab tuaj yeem tiv taus qhov ntsuas qhov ntsuas.
DIMENSIONAL TOLERANCES ntawm JIS G3444
- Sab nraud txoj kab uas hla a)
| Kev faib tawm | Sab nraud txoj kab uas hla b) |
Tolerances rau Sab nraud txoj kab uas hla c) |
Siv tau Division |
| Chav Kawm 1 | Hauv qab 50mm | ± 0.5 hli | Siv thaum tsis muaj specification. Muaj feem xyuam rau cov kub - tiav seamless steel raj. |
| 50mm los yog Tshaj | ± 1% | ||
| Chav kawm 2 | Hauv qab 50mm | ± 0.25 hli | Siv thaum muaj qhov tshwj xeeb. Tsis muaj feem xyuam rau kub - tiav seamless steel raj. |
| 50mm los yog Tshaj | ± 0.5% | ||
| Sau ntawv | a) Rau qhov chaw hauv zos xws li kho qhov chaw yog tias phab ntsa tuab tuaj yeem lees paub tias yog nyob rau hauv lub kam rau ua nyob rau hauv lub rooj hauv qab no, lub sab nraud txoj kab uas hla kam rau ua ntawm lub rooj no yuav tsum tsis txhob siv. |
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| b) Cov txheej txheem rau kev ntsuas cov kab sab nraud ntawm cov raj siab tshaj 350mm nyob rau hauv sab nraud txoj kab uas hla yuav raug txiav txim los ntawm qhov ntev ntev. Kev sib hloov ntawm sab nraud txoj kab uas hla D thiab lub voj voog ntev l yuav tsum yog los ntawm cov qauv hauv qab no: D = l / π Qhov twg D: sab nraud txoj kab uas hla (mm) l: circumferential ntev (mm) π: 3.1416 |
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| c) Lub tolerances nyob rau sab nraud txoj kab uas hla ntawm qhov kawg ntawm hluav taws xob kuj welded thiab tsis siv neeg arc welded steel hlab tshaj 350mm nyob rau hauv sab nraud txoj kab uas hla yuav tsum yog ± 0.5%. |
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- Phab ntsa Thickness kam rau ua a)
| Kev faib tawm | Rau Seamless Steel Tube | Rau Lwm yam tshaj Seamless Steel Tube | Siv tau Division | ||
| Phab ntsa Thickness | Tolerance ntawm phab ntsa Thickness | Phab ntsa Thickness | Tolerance ntawm phab ntsa Thickness | ||
| Chav Kawm 1 | Hauv qab 4mm | +0.6mm, -0.5 hli | Hauv qab 4mm | +0.6mm, -0.5 hli |
Siv thaum tsis muaj specification. Muaj feem xyuam rau cov kub - tiav seamless steel raj. |
| 4mm los yog Over | +15%, -12.5% | 4mm los yog Tshaj rau thiab excl. 12mm | +15%, -12.5% | ||
| 12mm los yog Tshaj | +15%, -1.5 hli | ||||
| Chav kawm 2 | Hauv qab 3mm | ± 0.3 hli | Hauv qab 3mm | ± 0.3 hli | Siv thaum muaj qhov tshwj xeeb. Tsis muaj feem xyuam rau kub - tiav seamless steel raj. |
| 3mm los yog Over | ±10% | 3mm los yog Tshaj rau thiab excl. 12mm | ±10% | ||
| 12mm los yog Tshaj | +10%, -1.2 hli | ||||
| Sau ntawv | a) Kev kam rau siab ntawm phab ntsa tuab ntawm cov raj siab tshaj 1016.0 hli nyob rau sab nraud txoj kab uas hla tuaj yeem pom zoo los ntawm cov chaw tsim khoom thiab cov neeg yuav khoom. | ||||
