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Engineering mechanical steel
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variety
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Steel grade
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Process
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standard/specification
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Purposes&LYSproduct characteristics
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High-strength steel for engineering mechanical use
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LG600
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hot rolling steel with yield strength 600MPa
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Technical specification
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Used For truck crane jib, rotating truck crane jib, rotating stands, engineering mechanism, the main backbone of lengthened (weighting) container, large-scale engineering parts, and heavy auto structure.
①High strength, plasticity and toughness, well-distributed and stable mechanical performance.
②good processing properties.
③can meet a variety of welding requests.
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LG700
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hot-rolled steel with yield strength 700MPa
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Technical specification
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LG700T
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tempered steel with yield strength 700MPa
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GB/T 16270-2009 Technical specification, GB/T 16270-2009
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LG700QT
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quenched and tempered steel with yield strength 700MPa
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GB/T 16270-2009 Technical specification, GB/T 16270-2009
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LG900QT
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quenched and tempered steel with yield strength 900MPa
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GB/T 16270-2009 Technical specification, GB/T 16270-2009
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LG960QT
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quenched and tempered steel with yield strength 960MPa
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GB/T 16270-2009 Technical specification, GB/T 16270-2009
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Main performance index
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category
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Steel grade
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Rel/Rp0.2(MPa)
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Rm(MPa)
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A50(%)
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Cold bending
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Impact temperature
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Akv(J)
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High-strength steel for engineering mechanical use
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LG600
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≥585
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≥685
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≥17
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d=3a，qualified
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-20
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≥47
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LG700
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≥685
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≥750
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≥14
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d=3a，qualified
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-20
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≥47
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LG700T
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≥685
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≥750
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≥14
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d=3a，qualified
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-20
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≥47
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LG700QT
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≥685
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≥750
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≥14
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d=3a，qualified
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-20
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≥47
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LG900QT
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≥900
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≥950
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≥11
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d=4a，qualified
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-20
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≥34
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LG960QT
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≥960
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≥980
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≥10
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d=4a，qualified
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-20
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≥34
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Shipbuilding sheet
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CCS-A
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≥235
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400~520
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≥22
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d=2a，qualified
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20
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/
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CCS-B
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≥235
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400~520
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≥22
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d=3a，qualified
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0
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≥27
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CCS-D
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≥235
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400~520
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≥22
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d=3a，qualified
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-20
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≥27
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CCS-E
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≥235
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400~520
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≥22
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d=3a，qualified
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-40
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≥27
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CCS-AH32
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≥315
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440~570
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≥22
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d=3a，qualified
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0
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≥31
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CCS-DH32
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≥315
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440~570
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≥22
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d=3a，qualified
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-20
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≥31
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CCS-AH36
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≥355
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490~630
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≥21
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d=3a，qualified
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0
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≥34
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CCS-DH36
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≥355
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490~630
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≥21
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d=3a，qualified
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-20
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≥34
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Bridge plate
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Q235qC
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≥235
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≥400
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≥26
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d=2a，3a，qualified
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0
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≥34
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Q235qD
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≥235
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≥400
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≥26
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d=2a，3a，qualified
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-20
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≥34
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Q235qE
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≥235
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≥400
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≥26
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d=2a，3a，qualified
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-40
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≥34
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Q345qC
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≥345
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≥490
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≥26
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d=2a，3a，qualified
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0
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≥47
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Q345qD
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≥345
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≥490
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≥26
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d=2a，3a，qualified
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-20
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≥47
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Q345qE
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≥345
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≥490
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≥26
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d=2a，3a，qualified
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-40
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≥47
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Q370qC
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≥370
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≥510
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≥20
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d=2a，3a，qualified
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0
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≥47
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Q370qD
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≥370
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≥510
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≥20
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d=2a，3a，qualified
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-20
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≥47
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Q370qE
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≥370
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≥510
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≥20
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d=2a，3a，qualified
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-40
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≥47
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Q420qC
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≥420
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≥540
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≥19
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d=2a，3a，qualified
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0
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≥47
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Q420qD
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≥420
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≥540
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≥19
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d=2a，3a，qualified
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-20
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≥47
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Q420qE
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≥420
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≥540
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≥19
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d=2a，3a，qualified
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-40
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≥47
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Key process and technology guarantees
1.Slab micro-structure defects control technology
2.Slab slow cooling and hot delivery hot charging technology
3.Temperature accuracy control technology in hot rolling process
4.Performance stability control technology
5.Slab shape control technology
