| Qualification criteria: 1st 3 + 4 | Wind: | ||||||
|---|---|---|---|---|---|---|---|
| Rank | Lane | Bib | Country | Name | Time | Diff | React. Time |
| 1 | 4 | 3183 | | JACKSON Bershawn | 49.20 Q | 0.157 | |
| 2 | 3 | 2727 | | de VILLIERS Pieter | 49.24 Q | +0.04 | 0.202 |
| 3 | 6 | 1234 | | SUGUIMATI Mahau | 49.45 Q | +0.25 | 0.170 |
| 4 | 8 | 1142 | | WILLIAMS Jonathan | 49.61 q | +0.41 | 0.175 |
| 5 | 2 | 2217 | | NARISAKO Kenji | 49.63 | +0.43 | 0.163 |
| 6 | 7 | 2647 | | MONTEIRO Edivaldo | 49.89 SB | +0.69 | 0.160 |
| 7 | 5 | 2528 | | GARBA Harouna | 55.14 | +5.94 | 0.291 |
| Qualification criteria: 1st 3 + 4 | Wind: | ||||||
|---|---|---|---|---|---|---|---|
| Rank | Lane | Bib | Country | Name | Time | Diff | React. Time |
| 1 | 8 | 3239 | | TAYLOR Angelo | 48.67 Q | 0.158 | |
| 2 | 6 | 2150 | | McFARLANE Danny | 48.86 Q | +0.19 | 0.179 |
| 3 | 5 | 2733 | | MYBURGH Alwyn | 48.92 Q SB | +0.25 | 0.148 |
| 4 | 4 | 2554 | | KAMANI Bayano | 49.05 q SB | +0.38 | 0.174 |
| 5 | 3 | 2772 | | DEREVYAGIN Alexander | 49.19 q | +0.52 | 0.187 |
| 6 | 7 | 2463 | | MAIGA Ibrahima | 50.57 | +1.90 | 0.229 |
| Qualification criteria: 1st 3 + 4 | Wind: | ||||||
|---|---|---|---|---|---|---|---|
| Rank | Lane | Bib | Country | Name | Time | Diff | React. Time |
| 1 | 5 | 2159 | | BUCKLEY Markino | 48.65 Q PB | 0.196 | |
| 2 | 8 | 2734 | | Van ZYL L.J. | 48.86 Q | +0.21 | 0.179 |
| 3 | 4 | 2605 | | PLAWGO Marek | 49.17 Q | +0.52 | 0.169 |
| 4 | 7 | 2681 | | CULSON Javier | 49.60 q | +0.95 | 0.246 |
| 5 | 3 | 1343 | | MENG Yan | 49.73 SB | +1.08 | 0.168 |
| 6 | 6 | 2293 | | POGORELOV Aleksey | 51.47 | +2.82 | 0.200 |
| Qualification criteria: 1st 3 + 4 | Wind: | ||||||
|---|---|---|---|---|---|---|---|
| Rank | Lane | Bib | Country | Name | Time | Diff | React. Time |
| 1 | 6 | 3149 | | CLEMENT Kerron | 49.42 Q | 0.240 | |
| 2 | 8 | 1952 | | IAKOVAKIS Periklis | 49.50 Q | +0.08 | 0.178 |
| 3 | 3 | 2153 | | PHILLIPS Isa | 49.55 Q | +0.13 | 0.225 |
| 4 | 7 | 2192 | | TAMESUE Dai | 49.82 | +0.40 | 0.214 |
| 5 | 5 | 1545 | | SANCHEZ Felix | 51.10 | +1.68 | 0.184 |
| 6 | 4 | 2567 | | BOINO Mowen | 51.47 SB | +2.05 | 0.250 |
| 2 | 2225 | | MELESHENKO Yevgeniy | DNF | 0.272 | ||
| Rank | Lane | Bib | Country | Name | Time | Diff | React. Time |
|---|---|---|---|---|---|---|---|
| Fn | False Start |
| q | Qualified by time |
| PB | Personal Best |
| SB | Season Best |
| DNF | Did Not Finish |
| (= NR)* | Equal National Record |
| Q | Qualified by Place |
| NR | National Record |
| DQ | Disqualified |
| DNS | Did Not Start |
| - | Pass |
| x | Fail |
| NM | No Mark |
| Q | Qualified by right |