A500 steel yeeb nkab yog dab tsi?
ASTM A500 yog tus qauv kev qhia tshwj xeeb tshaj tawm los ntawm American Society for Testing and Materials (ASTM) rau txias- ua welded thiab seamless carbon steel qauv raj. Nws cov ntsiab lus tseem ceeb yog raws li nram no:
1. Scope:
- Npog txias- tsim welded thiab seamless carbon steel puag ncig, square, rectangular, los yog irregularly zoo li tus structural raj siv nyob rau hauv welded, riveted, los yog bolted kev twb kev txuas rau txuas hniav thiab vaj tse, raws li zoo raws li rau kev siv cov qauv siv.
2. Kev txwv qhov loj:
- Cov raj nrog ib ncig ntawm 88 ntiv tes (2235 mm) lossis tsawg dua, thiab cov phab ntsa tuab ntawm 0.875 nti (22 hli) lossis tsawg dua.
3. Steel Qib Classification thiab Requirements:
- Qib A: Cov ntsiab lus carbon ntau dua, nrog rau qee qhov kev xav tau lub zog, haum rau cov qauv siv dav dav uas yuav tsum muaj zog tsis yog siab tshwj xeeb.
- Qib B: Muab piv rau Qib A, muaj zog ntxiv, tsim nyog rau cov khoom siv nrog lub zog siab dua.
- Qib C: Muaj lub zog siab thiab zoo toughness, haum rau cov qauv raug hnyav.
- Qib D: Yuav tsum tau kho cua sov kom tau raws li qhov yuav tsum tau muaj zog dua thiab toughness, feem ntau yog siv rau hauv cov khoom siv nrog cov khoom siv nruj heev. Rau cov raj square thiab cov duab plaub, qhov kev xav tau lub zog ntawm txhua qib siab dua rau cov raj puag ncig.
Cov khoom sib npaug rau ASTM A500
ASTM A5oo muaj ntau qhov sib npaug nyob ntawm qib tshwj xeeb, suav nrog European tus qauv EN 10219 (rau Qib C) thiab Canadian tus qauv CSA G40.21 (tshwj xeeb yog qib 44W lossis 5oW). Qhov sib npaug rau A500 kuj muaj feem xyuam rau qib ntawm cov hlau nws tau tsim los ntawm, xws li AlSl 1015 rau qee qhov kev siv. Lwm tus qauv tshiab, ASTM A1085, kuj yog ib qho piv txwv rau cov qauv tubing.
Kev xav tau tshuaj lom neeg ntawm ASTM A500 Qib A, A500 Qib B, A500 Qib D, thiab A500 Qib C
| Element | Qib A, B thiab D | Grace C | ||
|---|---|---|---|---|
| Kub Kev tsom xam |
Khoom Kev tsom xam |
Kub Kev tsom xam |
Khoom Kev tsom xam |
|
| Cov pa roj carbon, max | 0.26 | 0.30 | 0.23 | 0.27 |
| Manganese, max | ... | ... | 1.35 | 1.40 |
| Phosphorus, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Sulfur, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Tooj, thaum tooj liab hlau yog teev, min |
0.20 | 0.18 | 0.20 | 0.18 |
Tensile Requirements ntawm ASTM A500 Steel Qib
| Round Structural Tubing | ||||
|---|---|---|---|---|
| Qib A | Qib B | Qib C | Qib D | |
| Tensile zog, mn, ps (MPa) | 45 000 (310) |
58 000 (400) |
62 00 (427) |
58 000 (400) |
| Yield zog, mn, psi (MPa) | 33 000 (228) |
42 000 (290) |
46 000 (317) |
36 000 (250) |
| Elongation hauv 2 nti (50.8 mm), min, %A | 25B | 23C | 21D | 23C |
| Zoo li tus qauv tubing | ||||
|---|---|---|---|---|
| Qib A | Qib B | Qib C | Qib D | |
| Tensile zog, mn, ps (MPa) | 45 000 (310) |
58 000 (400) |
62 00 (427) |
58 000 (400) |
| Yield zog, mn, psi (MPa) | 39 000 (269) |
46 000 (317) |
50 000 (345) |
36 000 (250) |
| Elongation hauv 2 nti (50.8 mm), min, %A | 25B | 23C | 21D | 23C |
Dab tsi yog qhov txawv ntawm ASTM A36 thiab A500?
1. Txuj kev sib piv
| Cov khoom sib piv | ASTM A500 1 | ASTM A36 |
|---|---|---|
| Hom qauv | Txias- tsim welded / seamless carbon steel qauv tubing specification | Carbon structural steel specification |
| Daim Ntawv Thov Scope | Cov qauv hlau rau cov choj, cov tsev, thiab lwm yam. | Riveted, bolted, thiab welded qauv |
| Tshooj Duab | Hloov, square, duab plaub, lossis cov duab tshwj xeeb | Steel seem, phaj, tuav |
| Qib Classification | Qib A, B, C, D (Qib B feem ntau siv) | Qib ib leeg |
2. Chemical Composition Comparison (%)
| Element | ASTM A500 (Qib B) | ASTM A36 |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.26 | Tsawg dua lossis sib npaug li 0.25 |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.04 | Tsawg dua lossis sib npaug li 0.40 |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.35 | 0.80-1.20 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.04 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua los yog sib npaug li 0.05 |
3. Mechanical Properties Comparison
| Khoom | ASTM A500 (Qib B) | ASTM A36 |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug li 235MPa | Ntau dua lossis sib npaug li 250MPa |
| Tensile zog | 400-550MPa | 400-550MPa |
| Elongation | Ntau dua lossis sib npaug li 21% | Ntau dua lossis sib npaug li 20% |
| Txias Bending Performance | Nruab Nrab (Qib C / D zoo dua) | Zoo |
4. Cov ntawv thov ib txwm
ASTM A500 1
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