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GrE Q355 65Mn Q420B S355N prime hot rolled steel coil manufacturers use slabs (mainly continuous casting slabs) as raw materials, and after heating, they are made into strip steel by rough rolling units and finishing rolling units. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature by laminar flow, and rolled into steel strip coils by the coiler. The cooled steel strip coils undergo different finishing operations according to the different needs of users. Line (leveling, straightening, cross-cutting or longitudinal cutting, inspection, weighing, packaging and marking, etc.) are processed.
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type |
Chinese enterprise standard |
fairly international standard |
illustrate |
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Standard |
Grade |
Standard |
Grade |
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|
Hot rolled low carbon steel |
Q/BQB 302 |
SPHC |
JIS G3131 |
SPHC |
Suitable for the manufacture of cold-formed parts. |
|
SPHD |
SPHD |
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SPHE |
SPHE |
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|
StW22 |
DIN 1614 |
StW22 (DD11) |
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StW23 |
(EN10111) |
STW23 (DD12) |
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StW24 |
StW24 (DD13) |
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general structural steel |
Q/BQB 303 |
SS 330 |
JIS G3101 |
SS 330 |
It is used for general structural parts such as buildings, bridges, ships, and vehicles. |
|
SS400 |
SS400 |
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SS 490 |
SS 490 |
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SS 540 |
SS 540 |
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St 33 |
DIN 17100 |
St 33 (S185) |
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|
St 37-2 |
(EN10025) |
St 37-2 (S235JR) |
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St 37-3 |
St 37-3 (S235JO) |
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St 44-2 |
St 44-2 (S275JR) |
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St 50-2 |
St 50-2 (E295) |
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St 52-3 |
St 52-3 (S355JO) |
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|
hot rolled coil |
S315 |
X42,X46,X52 |
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|
S290,S360,S385 |
X56,X60,X65 |
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|
S415,S450,S480 |
X70 |
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