ASTM carbon steel (A36/A992) thiab stainless hlau (304/316) lub kaum ntse ntse muaj qhov sib txawv ntawm qhov sib npaug ntawm GB, tab sis kev hloov me me kom tsis txhob muaj seamless hloov - tseem ceeb rau kev hloov pauv thoob ntiaj teb.
Carbon Steel Lub kaum sib piv (ASTM vs. GB)
NojASTM A36 L4x4x0.5(sib npaug- ceg) thiabGB Q235B L100x100x12ua piv txwv:
| Dimension | ASTM A36 L4x4x0.5 | GB Q235B L100x100x12 | Variance | Yuav tsum tau kho |
|---|---|---|---|---|
| Leg Length (b) | 4 nti=101.6 hli | 100 hli | +1.6 hli | Siv slotted bolt qhov (15 mm ntev vs . 10 mm standard) kom haum GB brackets. |
| Thickness (t) | 0.5 nti=12.7 hli | 12 hli | +0.7 hli | Shorten bolt ntev los ntawm 0.7 hli (piv txwv li, M12x30 vs. M12x35) kom paub meej cov xov sib txuas. |
| Qhov hnyav (w) | 5.41 lbs/ft=8.06 kg/m | 7.55 kg / m | +0.51 kg/m | Tsis muaj kev hloov kho cov qauv- hnyav ntxiv ua rau muaj peev xwm thauj khoom me ntsis. |
| Tshooj Modulus (Zx) | 3.01 in³=49.3 cm³ | 4 7,9cmj | +1.4 cm³ | Tsis muaj peev xwm hloov kho -ASTM lub kaum sab xis txhawb nqa ~ 3% ntau bending load. |
Stainless hlau kaum sib piv (ASTM vs. GB)
NojASTM 304 L3x3x0.25(sib npaug- ceg) thiabGB 304 L75x75x6ua piv txwv:
| Dimension | ASTM 304 L3x3x0.25 | GB 304 L75x75x6 | Variance | Yuav tsum tau kho |
|---|---|---|---|---|
| Leg Length (b) | 3 nti=76.2 hli | 75mm ua | +1.2 hli | Siv 12 mm slotted qhov kom haum raws qhov dav sib txawv. |
| Thickness (t) | 0.25 nti=6.35 hli | 6 hli | +0.35 hli | Siv cov tshuab ntxhua khaub ncaws (0.3 hli tuab) los ntsuas lub kaum sab xis ntawm GB brackets. |
| Qhov hnyav (w) | 2.67 lbs/ft=3.98 kg/m | 3.89 kg / m | +0.09 kg/m | Tsis pom zoo-tsis muaj kev cuam tshuam rau kev txhawb nqa tsim. |
| Tshooj Modulus (Zx) | 1.21 in³=19.8 cm³ | 19.1cm3 ib | +0.7 cm³ | Tsis muaj peev xwm hloov kho -ASTM lub kaum ntse ntse ua tau raws li GB xav tau. |
Critical Dimensional Tolerance Alignment
ASTM thiab GB qhia qhov sib npaug ntawm qhov ntev rau qhov tseem ceeb, txo qhov kev hloov pauv:
Leg Ntev Tolerance± 1.5 hli (tsawg dua lossis sib npaug li 150 hli) rau ASTM A6 thiab GB / T 9787.
Thickness kam rau ua: ± 0.4 hli (tsawg dua lossis sib npaug li 12 hli) rau ob qho tib si qauv.
Kev ncaj: Tsawg dua los yog sib npaug li 1 mm / m rau ob qho tib si, ua kom lub kaum sab xis nruab tsis muaj warping.
Tiag -Kev hloov pauv ntiaj teb piv txwv
Suav zaub mov- hloov cov nroj tsuagGB 304 L100x63x8nrogASTM 316 L4x2.5x0.3125(tsis sib npaug- ceg) vim muaj cov khoom tsis txaus:
Dimensional haum: ASTM lub kaum sab xis (101.6x63.5x7.94 mm) yuav tsum tau 2 hli slotted qhov kom haum GB brackets (100x63x8 mm).
Load Capacity: ASTM lub kaum sab xis ntawm seem modulus (35.2 cm³) matched GB's (34.8 cm³), yog li tsis tas yuav hloov cov qauv.
Corrosion: 316's molybdenum ntxiv (2-3%) txhim kho cov tshuaj tiv thaiv acidic ntxuav vs . 304, txhim khu kev ruaj khov.
Nrog kev hloov kho yooj yim rau fasteners thiab brackets, ASTM cov ces kaum ntseeg tau hloov GB sib npaug rau ob qho tib si carbon thiab stainless hlau.