STKR400 yog Japanese Industrial Standard (JIS) tsim rau carbon steel square tubing siv nyob rau hauv txhua yam qauv. Thawj tus qauv rau nws cov welded square tubing yog JIS G 3444 (Carbon Steel Tubes rau Mechanical Structures). Cov qauv no qhia txog cov hauv qab no:
1. Cov Khoom Siv Khoom Siv: Cov tshuaj muaj pes tsawg leeg ntawm STKR400 yuav tsum ua raws li cov cai hauv qab no: Carbon (C) Tsawg dua lossis sib npaug li 0.30%, Manganese (Mn) 0.60% -1.20%, kom ruaj khov weldability.
2. Dimensional Tolerances: Tus qauv qhia qhov sib txawv ntawm ± 1.0 hli rau sab ntev thiab ± 10% rau phab ntsa thickness (saib rau Table 2 ntawm JIS G 3444). Piv txwv li, qhov tseeb sab ntev ntau rau 50mm × 50mm square tubing yog 49mm ~ 51mm.
3. Mechanical Properties: Tensile zog Ntau dua lossis sib npaug ntawm 400MPa, yield zog Ntau dua lossis sib npaug rau 235MPa (Cov ntaub ntawv qhov chaw: JIS Standard 2021).
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm STKR400 steel
| STKR400, JIS G 3466 | ||
| Tshuaj muaj pes tsawg leeg (%) | Cov pa roj carbon (C) | 0.25 max |
| Silicon (Si) | – | |
| Manganese (Mn) | – | |
| Phosphorus (P) | 0.040 max | |
| Sulfur (S) | 0.040 max | |
| Tensile zog (MPa) | 400 min | |
| Yield zog (MPa) | 245 feeb | |
| Elongation (%) | 23 feeb | |
Dab tsi yog ASTM sib npaug ntawm STK400?
STKR400 yog cov qauv hlau nyob rau hauv Japanese Industrial Standard (JIS), feem ntau yog siv rau kev tsim square thiab duab plaub. Hauv Asmeskas cov qauv, cov khoom siv sib xws lossis cov qauv zoo sib xws yog feem ntau ASTM A500 Qib B.
JIS g3466 STK400 specifications
Qib: STKR 400, STKR 490
Square Loj: 40 * 40mm-350 * 350mm
Rectangular Loj: 20 * 50mm-200 * 400mm
Phab ntsa Thickness: 1.6-12mm
Cov qauv sib xws: ASTM A500 Gr.A / B / C / D, EN 10219-1, EN 10210-1 S275JRH, S355J0H
JIS g3466 STK400 qhov ntev
| Table Dimensional Tolerances | |||
|---|---|---|---|
| Speclfied yam khoom thiab dimension | Dimensional kam rau ua | ||
| Ntev ntawm sab | 100 hli los yog qis dua | ± 1.5 hli | |
| Tshaj 100 mm | ±1.5% | ||
| Unevenness ntawm tiaj phaj feem ntawm txhua sab | Sab ntev 100 mm lossis qis dua | 0.5 hli max | |
| Sab ntev tshaj 100 mm | Tsis pub dhau 0.5% ntawm sab ntev | ||
| Anguiarity ua los ntawm qhov chaw tiaj tiaj tiaj tiaj | ±1.5% | ||
| Dimension ntawm kaum: s | 3mm max | ||
| Ntev | + tsis paub meej 0 | ||
| Kev tsis ncaj ncees | Tsis pub dhau 0.3% ntawm sab ntev | ||
| Phab ntsa thickness | Square steel raj tsim los ntawm vuam | Hauv qab 3 mm | ± 0.3 hli |
| 3 mm sau | ±10% | ||
| Seamless square steel raj | Hauv qab 4 mm | ± 0.6 hli | |
| 4 mm sau | ±15% | ||
JIS G3466 STK400 structural raj rau muag
