Structure Steel Plate for Wind Power Tower
1、Material:：
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Q345C/D/E--Z15/Z25/Z35 S355-J0/J2/K2/NL
2、Table of Standard comparisons:
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GB/T
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ISO
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ROCT
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ASTM
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JIS
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DIN
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EN10025
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|
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Q345C
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E335DD(4951)
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345
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Gr50(345)A572M
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SPFC590
|
\
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S355JO
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|
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Q345D
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E335DD(4951)
|
345
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Gr50(345)A572M
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SPFC590
|
\
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S355J2
|
|
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Q345E
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E335DD(4951)
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\
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Gr50(345)A572M
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SPFC590
|
\
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S355NL
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|
3、 technical requirements
A： Good weld ability
B： High liquid steel clarity
C： Good material homogenizing
D： High
E： specified organizational structure
4、technological process
According to Metallic recrystallization area and Metal end recrystallization area control process, then cold control after rolling process.
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Grade
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Chemical Composition %
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C
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Si
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Mn
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P
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S
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Nb
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Al
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carbon equivalent
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||
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Q345
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C
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≤0.20
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≤0.50
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≤1.70
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≤0.030
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≤0.030
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≤0.07
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≥0.015
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≤0.44
|
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D
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≤0.18
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≤0.030
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≤0.025
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||||||
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E
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≤0.025
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≤0.020
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Mechanical property:
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GRADE
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ReH (MPa) YIELD STRENGTH
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Rm MPa TENSILE STRENGTH
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A5(%)ELONGATION
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LONGI.V-NOTCH IMPACT(KV2)
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|||||
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≤16mm
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＞16~40mm
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＞40~60mm
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≤40mm
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＞40~60mm
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℃
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J
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|||
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Q345
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C
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≥345
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≥335
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≥325
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470~630
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≥21
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≥20
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0
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≥34
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D
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-20
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E
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-40
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□ Quality, Strength and toughness can meet with all Standard and using requirements.
□ As ferrite and pearlite steel, the material has the good tenacity matching, Impact energy more than 100J under -40℃ temperature without hot treatment.
□ Grain refining control technology in the whole process.
□ ferrite and pearlite steel high tenacity matching technology
