JIS G 3444 yog ib qho Japanese Industrial Standard uas qhia txog carbon steelround (circular cross-section) rajrau lub hom phiaj dav dav. Cov raj no tau siv dav hauv kev tsim kho vaj tse, txuas hniav, steel towers, scaffolding, foundation piles, thiab lwm yam civil engineering thiab architectural applications. Cov yam ntxwv tseem ceeb suav nrog lub zog txaus, zoo weldability, thiab txhim khu kev qha kev ua tau zoo nyob rau hauv qhov chaw thau khoom zoo li qub.
Tus qauv yog ib daim ntawv, tab sis nws cov kev cai tseem ceeb tuaj yeem muab ua pawg raws li hauv qab no:
- Chemical composition xav tau
- Mechanical zog
- Dimensional kam rau ua
- Kev tshuaj xyuas thiab kev sim
JIS G 3444 yog qhov tseem ceeb rau cov engineers thiab fabricators ua hauj lwm nrog cov txheej txheem steel raj nyob rau hauv Nyiv los yog tej yaam num referencing Japanese qauv, xyuas kom meej ua raws li cov kev cai hauv zos thiab meej specifications rau yield zog, tensile zog, elongation, thiab zoo tswj.
Scope ntawm daim ntawv thov
JIS G 3444 siv rau carbon steelncig (round) rajrau lub hom phiaj dav dav. Nws npog cov raj tsim los ntawm seamless, hluav taws xob tiv thaiv welded (ERW), rauv welded (FW), thiab tsis siv neeg arc vuam txheej txheem. Tus txheej txheem yog npaj rau cov txheej txheem kev ua haujlwm, txhawb cov tswv cuab, trusses, thiab cov kev siv zoo sib xws.
Khoom zoo li: Qhov Scope ntawm JIS G 3444 yog txwv raucov hlab ntsha. Square thiab rectangular hollow seem tsis them los ntawm tus qauv no. Japanese Industrial Standard rau square thiab rectangular structural raj yog JIS G 3466 (STKR).
Kev cais tawm: Tus qauv tsis siv rau cov raj rau kev pabcuam siab, siab -kev siv kub, lossis dej thauj hauv siab.
Kev txwv kub: Static loading nkaus xwb; dynamic loads xav tau kev txheeb xyuas ntxiv; Kev ua haujlwm tau pom zoo: -30℃txog 120 degree.
Hauv cov ntsiab lus, JIS G 3444 yog qhov tshwj xeeb raupuag ncigCov qauv carbon steel tubes, thaum JIS G 3466 (STKR) yog tus qauv ntxiv rausquare thiab rectangularstructural hollow seem.
Classified Steels (Qib)
JIS G 3444 faib cov raj steel rau hauv ntau qib raws li lawv lub zog tensile. Lub npe prefix "STK" sawv rauSteelTub rauKōzō ( qauv hauv Japanese). Cov qib uas feem ntau yog:
STK 290
tsis tshua muaj zog, siv rau cov qauv teeb
01
STK400
general structural qib
02
STK490
siab zog rau nruab nrab mus rau hnyav qauv
03
STK 500
siab zog rau kev thov kev thov
04
STK540
qib siab zog
05
Cov qib no yog tag nrho cov uas tsis yog - alloy carbon steels. Tus lej qhia qhov tsawg kawg nkaus tensile zog hauv N / mm² (MPa).
Kev Xaiv Qhov System (Piv txwv: STK400)
Lub npe ntawm lub raj steel raws li JIS G 3444 muaj xws li:
- Cov ntawvSTK
- Peb tus lej - tus lej qhia qhovyam tsawg kawg nkaus tensile zognyob rau hauv N / mm² (MPa)
Piv txwv li:STK400
- STK- Steel raj rau kev tsim qauv
- 400- Tsawg tensile zog ntawm 400 N / mm²
Tsis zoo li EN 10210, tsis muaj cov ntawv rau cov khoom cuam tshuam (xws li J0, N, H) siv hauv JIS G 3444.
Chemical Composition Requirements (Ladle Analysis)
Cov lus hauv qab no qhia txog qhov siab tshaj plaws ntawm cov tshuaj muaj pes tsawg leeg rau cov qib feem ntau, raws li JIS G 3444:
| Qib | C Tsawg dua los yog sib npaug | Si Less than los sib npaug | Mn Tsawg dua lossis sib npaug | P Tsawg dua lossis sib npaug | S Tsawg dua los yog sib npaug | Cov Kev Cai Tshwj Xeeb |
| STK 290 | – | – | – | 0.05 | 0.05 | – |
| STK400 | 0.25 | – | – | 0.04 | 0.04 | – |
| STK490 | 0.18 | 0.55 | 1.65 | 0.035 | 0.035 | Tsawg- carbon tsim rau weldability |
| STK 500 | 0.24 | 0.35 | 0.30-1.30 | 0.04 | 0.04 | – |
| STK540 | 0.23 | 0.55 | 1.5 | 0.04 | 0.04 | Custom agreement for t>12.5mm 3 |
Lus Cim: STK290 tsis muaj cov pa roj carbon, silicon, lossis manganese txwv lwm yam tshaj li cov ntsiab lus qis. STK490 nta cov pa roj carbon tsawg (tsawg dua lossis sib npaug li 0.18%) rau kev pom zoo weldability.
Mechanical Properties
| Cim ntawm Qib |
Tensile Lub zog N / hli 2 |
Yield Point los yog Pov thawj Stress N / hli 2 |
Weld Tensile N / hli 2 |
flattening Kev Tiv Thaiv Lub Zog |
Kho tau yooj yim | |
| Qhov nrug nruab nrab ntawm Flat Phaj (H) |
Khoov Lub kaum sab xis, a) |
Sab hauv Radius |
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| Siv tau sab nraud | ||||||
| Txhua tus sab nraud Txoj kab uas hla |
Txhua tus sab nraud Txoj kab uas hla |
Txhua tus sab nraud Txoj kab uas hla |
Txhua tus sab nraud Txoj kab uas hla |
50mm los yog qis dua | ||
| JIS G3444 TIAB SA 290 |
290 nqi. | - | 290 nqi. | 2/3D | 90 degree | 6D |
| JIS G3444 TSI 400 |
400 min. | 235 nqi. | 400 min. | 2/3D | 90 degree | 6D |
| JIS G3444 TIAB SA 490 |
490 nqi. | 315 nqi. | 490 nqi. | 7/8D | 90 degree | 6D |
| JIS G3444 TSI 500 |
500 min. | 355 nqi. | 500 min. | 7/8D | 90 degree | 6D |
| JIS G3444 TIAB SA 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 1N/mm 2=1 MPa Lus Cim a) Cov dabtsi yog khoov lub kaum sab xis yuav tsum ntsuas los ntawm qhov pib ntawm qhov khoov. |
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- Lub zog tawm los yog qhov qis dua qhov taw tes (lossis 0.2% pov thawj kev ntxhov siab rau cov raj seamless).
- Elongation yog ntsuas siv lub ntsuas qhov ntev ntawm 5.65√S₀ (cov qauv piv txwv) lossis 50 hli rau cov qauv ntsuas.
Dimensional Tolerances
Tolerances ntawm sab nraud txoj kab uas hla, thickness, ncaj, thiab loj yog teev nyob rau hauv JIS G 3444.
|
Parameter |
Tolerance (ntev) |
|
Sab nraud txoj kab uas hla (D) |
Nws txawv ntawm qhov loj me; xa mus rau JIS G 3444 cov lus |
|
Thickness (t) |
Raws li tau teev tseg rau tus qauv |
|
Kev ncaj |
Tsawg dua lossis sib npaug li 0.20% ntawm tag nrho qhov ntev |
| - Sab nraud txoj kab uas hla a) | |||
| Kev faib tawm | O.D. b) | Tolerances rau O.D. c) |
Siv tau Division |
| Chav Kawm 1 | Hauv qab 50mm | ± 0.5 hli | Siv thaum tsis muaj specification.Applicable mus rau kub- tiav seamless steel raj. |
| 50mm los yog Tshaj | ±1% | ||
| Chav kawm 2 | Hauv qab 50mm | ± 0.25 hli | Siv thaum muaj qhov specification.Not muaj feem xyuam rau kub - tiav seamless steel raj. |
| 50mm los yog Tshaj | ±0.5% | ||
| Nco tseg: a) Rau qhov chaw hauv cheeb tsam xws li kho pat yog tias cov phab ntsa tuab tuaj yeem raug cofirmed nyob rau hauv kam rau ua nyob rau hauv lub rooj hauv qab no, sab nraud txoj kab uas hla ntawm lub rooj no yuav tsum tsis txhob siv. b) Cov txheej txheem rau kev ntsuas lub cheeb sab nraud ntawm cov hlab tshaj 350mm nyob rau hauv sab nraud txoj kab uas hla yuav yog txiav txim los ntawm lub voj voog ntev.Qhov 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 length(mm) π: 3.1416 c) Kev kam rau sab nraud ntawm qhov kawg ntawm qhov hluav taws xob tsis zoo welded thiab tsis siv neeg arcweldedsteeltubes tshaj 350mm nyob rau sab nraud txoj kab uas hla yuav tsum yog ± 0.5%. |
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| 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 muaj tsis muaj specification. Muaj feem xyuam rau kub -ua tiav seamless steel tub. |
| 4mm los yog Over | +15%,-12.5% | 4mm los yog Over mus thiab excl. 12 hli |
+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 ib specification.Not siv tau rau kub -ua tiav seamless steel tub. |
| 3mm los yog Over | ±10% | 3mm los yog Over mus thiab excl. 12 hli |
±10% | ||
| 12mm los yog Tshaj | +10%, -1.2 hli | ||||
| Nco tseg: a) Kev kam rau siab ntawm phab ntsa hickness ntawm cov hlab tshaj 1016.0 mm nyob rau hauv sab nraud txoj kab uas hla yuav pom zoo nyob ntawm tus neeg tsim khoom thiab tus neeg yuav khoom. |
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* Ceeb Toom: Txij li JIS G 3444 tsuas yog siv cov raj ncig, kaum lub kaum sab xis rau cov duab square / duab plaub tsis siv.*
| Nominal Loj |
Sab nraum Txoj kab uas hla |
Thickness (t) |
Qhov hnyav | Hla Sectional Thaj chaw |
Geometical Moment ntawm rert |
Modulus ntawm Tshooj |
Radius ntawm Gyration |
| mm. | mm. | mm. | kg/m | cm xo | cm ⁴ | cm3 ua | cm |
| 15 | 21.7 | 2.00 | 0.972 | 1.238 | 0.607 | 0.560 | 0.700 |
| 20 | 27.2 | 2.00 | 1.24 | 1.583 | 1.26 | 0.930 | 0.890 |
| 2.30 | 1.41 | 1.799 | 1.41 | 1.03 | 0.880 | ||
| 25 | 34.0 | 2.30 | 1.80 | 2.291 | 2.89 | 1.70 | 1.12 |
| 32 | 42.7 | 2.30 | 2.29 | 2.919 | 5.97 | 2.80 | 1.43 |
| 2.50 | 2.48 | 3.157 | 6.40 | 3.00 | 1.42 | ||
| 40 | 48.6 | 2.30 | 2.63 | 3.345 | 8.99 | 3.70 | 1.64 |
| 2.50 | 2.84 | 3.621 | 9.65 | 3.97 | 1.63 | ||
| 2.80 | 3.16 | 4.029 | 10.6 | 4.36 | 1.62 | ||
| 3.20 | 3.58 | 4.564 | 11.8 | 4.86 | 1.61 | ||
| 50 | 60.5 | 2.30 | 3.30 | 4.205 | 17.8 | 5.90 | 2.06 |
| 3.20 | 4.52 | 5.760 | 23.7 | 7.84 | 2.03 | ||
| 4.00 | 5.57 | 7.100 | 28.5 | 9.41 | 2.00 | ||
| 65 | 76.3 | 2.80 | 5.08 | 6.465 | 43.7 | 11.5 | 2.60 |
| 3.20 | 5.77 | 7.349 | 49.2 | 12.9 | 2.59 | ||
| 4.00 | 7.13 | 9.085 | 59.5 | 15.6 | 2.58 | ||
| 80 | 89.1 | 2.80 | 5.96 | 7.591 | 70.7 | 15.9 | 3.05 |
| 3.20 | 6.78 | 8.636 | 79.8 | 17.9 | 3.04 | ||
| 90 | 101.6 | 3.20 | 7.76 | 9.892 | 120 | 23.6 | 3.48 |
| 4.00 | 9.63 | 12.26 | 146 | 28.8 | 3.45 | ||
| 5.00 | 11.9 | 15.17 | 177 | 34.9 | 3.42 | ||
| 100 | 114.3 | 3.20 | 8.77 | 11.17 | 172 | 30.2 | 3.93 |
| 3.50 | 9.56 | 12.18 | 187 | 32.7 | 3.92 | ||
| 4.50 | 12.2 | 15.52 | 234 | 41.0 | 3.89 | ||
| 125 | 139.8 | 3.60 | 12.1 | 15.40 | 357 | 51.1 | 4.82 |
| 4.00 | 13.4 | 17.07 | 394 | 56.3 | 4.80 | ||
| 4.50 | 15.0 | 19.13 | 438 | 62.7 | 4.79 | ||
| 6.00 | 19.8 | 25.22 | 566 | 80.9 | 4.74 | ||
| 150 | 165.2 | 4.50 | 17.8 | 22.72 | 734 | 88.9 | 5.68 |
| 5.00 | 19.8 | 25.16 | 808 | 97.8 | 5.67 | ||
| 6.00 | 23.6 | 30.01 | 952 | 115 | 5.63 | ||
| 7.10 | 27.7 | 35.26 | 1100 | 134 | 5.60 |
| Nominal Loj |
Sab nraum Txoj kab uas hla |
Thickness (t) |
Qhov hnyav | Hla Sectional Thaj chaw |
Geometical Moment ntawm rert |
Modulus ntawm Tshooj |
Radius ntawm Gyration |
| mm. | mm. | mm. | kg/m | cm xo | cm ⁴ | cm3 ua | cm |
| 175 | 190.7 | 4.50 | 20.7 | 26.32 | 1140 | 120 | 6.59 |
| 5.30 | 24.2 | 30.87 | 1330 | 139 | 6.56 | ||
| 6.00 | 27.3 | 34.82 | 1490 | 156 | 6.53 | ||
| 7.00 | 31.7 | 40.40 | 1710 | 179 | 6.50 | ||
| 8.20 | 36.9 | 47.01 | 1960 | 206 | 6.46 | ||
| 200 | 216.3 | 4.50 | 23.5 | 29.94 | 1680 | 155 | 7.49 |
| 5.80 | 30.1 | 38.36 | 2130 | 197 | 7.45 | ||
| 6.00 | 31.1 | 39.64 | 2190 | 203 | 7.44 | ||
| 7.00 | 36.1 | 46.03 | 2520 | 233 | 7.40 | ||
| 8.00 | 41.1 | 52.35 | 2840 | 263 | 7.37 | ||
| 8.20 | 42.1 | 53.61 | 2910 | 269 | 7.36 | ||
| 250 | 267.4 | 6.00 | 38.7 | 49.27 | 4210 | 315 | 9.24 |
| 6.60 | 42.4 | 54.08 | 4600 | 344 | 9.22 | ||
| 7.00 | 45.0 | 57.26 | 4860 | 363 | 9.21 | ||
| 8.00 | 51.2 | 65.19 | 5490 | 411 | 9.18 | ||
| 9.00 | 57.3 | 73.06 | 6110 | 457 | 9.14 | ||
| 9.30 | 59.2 | 75.41 | 6290 | 470 | 9.13 | ||
| 300 | 318.5 | 6.00 | 46.2 | 58.91 | 7190 | 452 | 11.1 |
| 6.90 | 53.0 | 67.55 | 8200 | 515 | 11.0 | ||
| 8.00 | 61.3 | 78.04 | 9410 | 591 | 11.0 | ||
| 9.00 | 68.7 | 87.51 | 10500 | 659 | 10.9 | ||
| 10.30 | 78.3 | 99.73 | 11900 | 744 | 10.9 | ||
| 350 | 355.6 | 6.40 | 55.1 | 70.21 | 10700 | 602 | 12.3 |
| 7.90 | 67.7 | 86.29 | 13000 | 734 | 12.3 | ||
| 9.00 | 76.9 | 98.00 | 14700 | 828 | 12.3 | ||
| 9.50 | 81.1 | 103.3 | 15500 | 871 | 12.2 | ||
| 12.00 | 102 | 129.5 | 19100 | 1080 | 12.2 | ||
| 12.70 | 107 | 136.8 | 20100 | 1130 | 12.1 | ||
| 400 | 406.4 | 7.90 | 77.6 | 98.90 | 19600 | 967 | 14.1 |
| 9.00 | 88.2 | 112.4 | 22200 | 1090 | 14.1 | ||
| 9.50 | 93.0 | 118.5 | 23300 | 1150 | 14.0 | ||
| 12.00 | 117 | 148.7 | 28900 | 1420 | 14.0 | ||
| 12.70 | 123 | 157.1 | 30500 | 1500 | 13.9 |
Rau siab - zoo carbon steel tubes tsim rau JIS G 3444 thiab lwm yam thoob ntiaj teb cov qauv, thov hu rau koj tus neeg muag khoom ntseeg siab--LEFIN STEEL.