1. For all Grades, the steel shall be killed.
2. For Grades 50W[345W], HPS 50W [HPS 34W],and HPS 70W[HPS 485W], the steel shall be made to fine grain practice.
3. For Grade 50S[345S], the steel-making practice used shall be one that produces steel having a nitrogen content not greater than 0.015 % and includes the addition of one or more nitrogen-binding elements, or one that produces steel having a nitrogen content of not greater than 0.012 % (with or without the addition of nitrogen-binding elements). The nitrogen con-tent need not be reported, regardless of which steel-making practice was used.
4. For Grades HPS 50W[HPS 345W], HPS 70W [HPS 485W] and HPS 100W[HPS 690W], the steel shall be made using a low-hydrogen practice, such as vacuum degassing during steel making; controlled soaking of the ingots, slabs; controlled slow cooling of the ingots, slabs, or plates, or a combination thereof.
5. For Grade HPS 100W[HPS 690W], the requirements for fine austenitic grain size in Specification A6/A6M shall be met.
6. Grades HPS 50W[HPS 345W] and HPS 70W[HPS 485W] shall be furnished in one of the following conditions: as-rolled, control-rolled, thermo-mechanical control processed(TMCP) with or without accelerated cooling, or quenched and tempered.
7. For fracture critical base material only, weld repair of the base metal by the material manufacturer or supplier is not permitted.
Element | Chemical % |
C, max | 0.23 |
Mn | 0.50-1.60A |
Si ,max | 0.40 |
V ,max | 0.15B |
Nb ,max | 0.05B |
P ,max | 0.035 |
S ,max | 0.045 |
Cu ,max | 0.60 |
Ni xma | 0.45 |
Cr ,max | 0.35 |
Mo ,max | 0.15 |
A709 Grade | Thick | Yield | Tensile [MPa] | Elongtation Min % | reduction | HB | |||
Steel Plate | Structural steel | ||||||||
8in[200mm] | 2in[50mm] | 8in[200mm] | 2in[50mm] | ||||||
36[250] | ≤100 | [250]min | 400-550 | 20 | 23 | 20 | 21 | … | … |
| [250]min | 400min | … | … | 20 | 19 | … | … | |
50[345] | ≤100 | 345min | 450min | 18 | 21 | 18 | 21F | … | … |
50S[345S] | G | 345-450HI | 450minH | … | … | 18 | 21 | … | … |
50W[345W] | ≤100 | 345min | 485min | 18 | 21 | 18 | 21J | … | … |
HPS70W[HPS485W] | ≤100 | 485min | 585-760 | … | 19K | … | … | … | … |
100 [690], 100W [690W],HPS100W [HPS690W] | ≤65 | 690minB | 760-895 | … | 18K | … | … | L | 235-293M |
100 [690], 100W [690W], | 65-100 | 620minB | 690-895 | … | 16K | … | … | L | … |
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