ASTM A387 steel specification yog hais txog 6 qib ntawm alloy steel daim hlau rau kev siv kub kub, categorized los ntawm chromium thiab molybdenum cov ntsiab lus, qib 11 thiab qib 12 muaj cov tshuaj zoo sib xws thiab tuaj yeem siv rau cov hlab ntsha siab thiab cov boilers, feem ntau siv hauv cov roj. thiab roj thiab petrochemical kev lag luam, feem ntau yog siv rau kev thauj mus los ntawm cov kub nruab nrab. qib 5 thiab qib 9 daim hlau muaj cov ntsiab lus ntawm chromium thiab molybdenum nrog corrosion zoo thiab kub tsis kam, uas yog raws nraim li qhov kev lag luam qaub thiab roj xav tau. GNEE Group muaj ntau yam ntawm ASTM A387 steel daim hlau nyob rau hauv ntau qhov ntau thiab tsawg rau cov chaw tsim khoom siab thiab cov roj thiab roj kev lag luam. Yog tias koj txaus siab rau ASTM A387 steel daim hlau lossis lwm yam khoom siv roj ntsha siab, thov hu rau peb hnub no rau tus nqi tshiab!
ASTM A387 siab lub nkoj phaj Chemical Composition:
| ASTM A 387 Cov khoom lag luam | Qib 5 | Qib 9 | Qib 11 | Qib 12 | Qib 22 |
|---|---|---|---|---|---|
| Cov pa roj carbon | 0.15 max | 0.15 max | 0.04 - 0.17 | 0.04 - 0.17 | 0.04 - 0.15 |
| Manganese | 0.25 - 0.66 | 0.25 - 0.66 | 0.35 - 0.73 | 0.35 - 0.73 | 0.25 - 0.66 |
| Phosphorous | 0.035 | 0.030 | 0.035 | 0.035 | 0.035 |
| Sulfur | 0.030 | 0.030 | 0.035 | 0.035 | 0.035 |
| Silicon | 0.55 max | 1.05 max | 0.44 - 0.86 | 0.13 - 0.45 | 0.5 max |
| Chromium | 3.9 - 6.1 | 7.9 - 10.1 | 0.94 - 1.56 | 0.74 - 1.21 | 1.88 - 2.62 |
| Molybdenum | 0.40 - 0.7 | 0.85 - 1.15 | 0.40 - 0.7 | 0.4 - 0.65 | 0.85 - 1.15 |
ASTM A387 siab nkoj steel phaj Mechanical Property:
| ASTM A387 Mechanical Property | A387 Qib 5 | A387 Qib 9 | A 387 Qib 11 | A 387 Qib 12 | A 387 Qib 22 | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chav Kawm 1 | Chav kawm 2 | Chav Kawm 1 | Chav kawm 2 | Chav Kawm 1 | Chav kawm 2 | Chav Kawm 1 | Chav kawm 2 | Chav Kawm 1 | Chav kawm 2 | |
| Tensile zog (ksi) |
60-85 |
75-100 |
60-85 |
75-100 |
60-85 |
70-90 |
50-80 |
65-85 |
60-85 |
75-100 |
| Tensile zog (Mpa) |
415-585 |
515-690 |
415-585 |
515-690 |
415-585 |
485-620 |
380-550 |
450-585 |
415-585 |
515-690 |
| Yield zog (ksi) |
30 |
45 |
30 |
45 |
35 |
45 |
33 |
40 |
30 |
45 |
| Tensile zog (Mpa) |
205 |
310 |
205 |
310 |
240 |
310 |
230 |
275 |
205 |
310 |
| Elongation hauv 200mm (%) | 19 | 18 | 18 | 19 | ||||||
| Elongation hauv 50mm (%) | 18 | 18 | 18 | 18 | 22 | 22 | 22 | 22 | 18 | 18 |
| Txo thaj tsam hauv% | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 |
