High Rise Building Structure Steel Plate

High Rise Building Structure Steel Plate

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High Rise Building Structure Steel Plate

♦ Specification Range & Status on Delivery

1. Specification Range

Thickness：8mm-300mm
Width：1500mm-4020mm
Length：3000mm-18000mm

2. MOQ for each order

25 Ton Status on Delivery: According to the performance and the requirements from clients, the status on delivery of steel plate can be hot rolled, ontrolled rolling, normalizing,annealed tempering, normalizing + tempering, hardening + tempering , etc.

3. flaw detection & Through-Thickness Property

We are capable of manufacturing the steel plate with additional flaw detection and Z15-Z35 tear resistance ( Through-Thickness Property ), also can supply you with Z-Direction Steel Plate according to ASTM、A770 standard.

♦ Application

Apply to manufacture pillar and the load-bearing beam for industrial & civil buildings and other steel structure and etc.

teel Grade Executive Standard
HBS235（2），HBS345（2） special purpose & condition
SN400(A,B,C),SN490(B,C) JIS G 3136
275(D,E,EZ),355(D,E,EM)
355EMZ,450(EM,EMZ)		 BS7191
Q235GJC， Q235GJD
Q345GJC， Q345GJD		 YB4104

1  Item name and application

Item name Brand Brand implication Carried standard Application
Steel plates for building structure Q235GJ Q—stands for yield point 235, 345,390,420,460-stands for value of yield point GJ-stands for high-rise bulding in Chinese spelling. GB/T19879 —2005 Applied in high-rising building, longspan structure and other important steel plates for building structure. Also used in making steel structure like pillar and spandrel girder in industry and civil buildings.
Q345GJ
Q390GJ
Q420GJ
Q460GJ

2  Techincal requirement

2.1 Brand name and melting composition

Band Chemical composition/%
C Si Mn P≤ S≤ Nb Ti Cr≤ Cu≤ V ≤ Ni ≤ Alt ≥
Q235GJ B 6~60 ≤0.20 ≤0.35 0.60~ 1.20 0.025 0.015 0.30 0.30 0.30 0.015
C
D ≤0.18 0.020
E
Q345GJ B 6~60 ≤0.20 ≤0.55 ≤1.60 0.025 0.015 0.015 ~ 0.060 0.01~ 0.03 0.30 0.30 0.02 ~ 0.15 0.30 0.015
C
D ≤0.18 0.020
E
Q390GJ C 6~60 ≤0.20 ≤0.55 ≤1.60 0.025 0.015 0.015 ~ 0.060 0.01~ 0.03 0.30 0.30 0.02 ~ 0.20 0.70 0.015
D ≤0.18 0.020
E
Q420GJ C 6~60 ≤0.20 ≤0.55 ≤1.60 0.025 0.015 0.015 ~ 0.060 0.01~ 0.03 0.40 0.30 0.02 ~ 0.20 0.70 0.015
D ≤0.18 0.020
E
Q460GJ C 6~60 ≤0.20 ≤0.55 ≤1.60 0.025 0.015 0.015 ~ 0.060 0.01~ 0.03 0.70 0.30 0.02 ~ 0.20 0.70 0.015
D ≤0.18 0.020
E

2.2 Mechanical property

Brand Quality grade Thickness mm Yield point MPa Tensile strength MPa Elongation % V type impact strength (longitudinal) 180° Bending test Thickness of steel products mm Yield ratio is not more than
T℃ J
No less than ≤16 ＞16
Q235GJ B ≤16 >16~35 >35~50 >50~100 235 235 225 215 400 — 510 23 20 34 d=2a d=3a 0.80
C 0
D -20
E -40
Q345GJ B ≤16 >16~35 >35~50 >50~100 345 345 335 325 490 — 610 22 20 34 d=2a d=3a 0.83
C 0
D -20
E -40
Q370GJ B ≤16 >16~35 >35~50 >50~100 390 390 380 370 490 — 650 20 20 34 d=2a d=3a 0.85
C 0
D -20
E -40
Q420GJ B ≤16 >16~35 >35~50 >50~100 420 420 410 400 520 — 680 19 20 34 d=2a d=3a 0.85
C 0
D -20
E -40
Q460GJ B ≤16 >16~35 >35~50 >50~100 460 460 450 440 550 — 720 17 20 34 d=2a d=3a 0.85
C 0
D -20
E -40

2.3 Carbom equivalent agreement

The chemical composition of calculating carbon equivalent or the sensitivity exponent of weld crack is indicated in certificate of quality. The carbon equivalent or the sensitivity exponent of weld crack of all brands should meet the requirement in sheet 4. Use heat analysis and calculate carbon equivalent or the sensitivity exponent of weld crack based on fornula (1) or (2).
CE（%）=C+Mn/6+（Cr+Mo+V）/5+（Ni+Cu）/15………………………………（1）
Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B………………..(2)

Brand Delivery condition Ceq Pcm
≤50mm ＞50~100mm ≤50mm ＞50~100mm
Q235GJ Hot rolled, Controlled rolled ≤0.36 ≤0.36 ≤0.26
Q345GJ Hot rolled, Controlled rolled ≤0.42 ≤0.44 ≤0.29
TMCP ≤0.38 ≤0.40 ≤0.24 ≤0.26

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