7/23/13
Chi nese standar ds on steel mater i al s
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Chinese standards on steel materials
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GB standards for steel materials This group of Chinese (GB) standard specifications specifications covers carbon and alloy steel plates and forgings used in boilers and pressure vess els, high-strength low-alloy steels, heat-treatable heat-treatable steels, hot and cold-rolled plates for cold forming, steels for concrete reinforcement reinforcement and prestress ed concrete and the properties for railway service rails and accessories. Standards for various var ious ty types pes of steel pipe which specify requirements for high-temperature service, ordinary ordinary use, and s pecial applications s uch as fire protection use, are also presented. Specifications Specifications for steel tubes lis t standard requirements for boiler and s uperheater tubes, general s erv ervice ice tubes, s till tubes in refinery service, heat exchanger exchanger and condenser tubes , mechanical and structural tubing. Steel Steel casting s pecificat pecifications ions call out the s tandard properties properties for press ure purposes. Group Grou p of standards for structural and constructional steels
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GB 699-88
Quality carbon s teels
GB 700-88
Carbon s teels
GB 701-91 701-91
Hot-rolled carbon carbon steel steel wire rods
GB 713-86 713-86
Plates for boilers
GB 1222-84 1222-84
Spring steels
GB 1300-77 1300-77
Welding filler materials for carbon and alloy steels
GB 1 49 49 99- 84 84
R ei ei nf nfo rc rc in in g b ar ar s fo r c on on cr cr et ete
GB 1 59 59 11- 88 88
L ow ow a llll oy oy s tr tru ct ctu ra ra l s te te el el s
GB 2 51 51 77- 81 81
Sh ee ee ts ts an an d s tr tr ip ip s fo r s tr tru ct ctu re re
GB 30 3077-88
Alloy s te teels
GB 32 32 03 03 -8 -8 2
Be ar ar in in g s te te el el s fo fo r c as as e h ar ar de de ni ni ng ng
GB 3 27 27 33- 89 89
Pl at ate s fo fo r au au to to m ob ob ilil e s trtr uc uc tu tu ra ra l us us es es
GB 32 3275 75-9 -91 1
HotHo t-ro roll lled ed qu qual alit ity y ca carb rbon on ste steel el pl plat ates es
GB 3423-82
Drill tubes
GB 3 52 52 22- 83 83
C ol ol d r ol ol le le d ca rb rb on on st ste el el st str ip ip s
GB 3 53 53 00-83
Ste el el s tr tri p for s pr pri ng ng s
GB 3531 3531-8 -83 3
Plat Pl ates es for for pressu pressure re vesse vessels ls for for low low temp temper erat atur ure e serv servic ice e
GB 41 41 71 71 -8 -84
Su pe pe riri or or we we at ath er eri ng ng s te tee ls ls
GB 417 4172-8 2-84 4
Atmo tmospher spheric ic cor corrosi rosionon-resi resistin sting g steel steels s for for wel welded ded str struct uctur ure e
GB 4358-84
Piano wire
GB 43 4360-84
Spring st steel wi wire
GB 44 44 63 63 -8 -84
Pre st stre ss ss ed ed co co nc ncre te te s te te el el
GB 5067-85
Alloy s te teel s he heets
GB 521 5216-8 6-85 5
Struc St ructu tural ral ste steels els wit with h spec specif ified ied har harden denabi abilit lity y ban bands ds
GB 5 21 21 88- 85 85
Al lo lo y s te te el el w irir es es fo fo r s p riri ng ng s
GB 5220-85
Valve s pr pring wire
GB 5221-85
Valve s pr pring wire
GB 53 5310 10-8 -85 5
Seaml Se amless ess stee steell tub tubes es for for hi high gh pr pressu essure re bo boil iler er
GB 5676-85
Carbon cas t s te teels
GB 5 68 68 00-85
Hi gh gh ma ma ng ng an an es es e ca st st s te te el el s
GB 59 59 53 53 -8 -8 6
C ar ar bo bo n s te te el el s wi wi re re s fo fo r c ol ol d h ea ea di di ng ng
GB 59 59 54 54 -8 -8 6
Al lo lo y s te te el el wi wi re re s fo fo r c ol ol d h ea ea di di ng ng
GB 6 47 47 88-86
Ste el el s fo r col d h ea ea di di ng ng
GB 647 6479-8 9-86 6
Seamless Se amless steel steel tube tubes s for equ equipme ipment nt of of chemi chemical cal ind industr ustry y fo forr high high pressure pressure serv service ice
GB 66 66 53 53 -8 -8 6
Sh ee ee ts ts fo fo r w el el de de d g as as cy cyl in in de de rs rs
GB 66 66 54 54 -8 -86
Pl at ate s fo fo r p re res s ur ure ve ve ss ss el el s
GB 7101 7101-9 -91 1
HotHo t-ro roll lled ed qua quali lity ty ca carb rbon on stee steell sheet sheets s and stri strips ps
GB 8162-87
Seam le les s s te teel tubes
GB 8163-87
Seam le les s s te teel pipes
7/23/13
Chinese standards on steel materials Points from the chemical compos ition, low carbon steel grades Q195, Q215, Q235, Q255 and Q275 grade large carbon content, the higher the m anganese content, the more s table its plas ticity. Mechanical properties of the points from the above that the thickness of ≤ 16mm grade yield point of steel. Its tensile strength, respectively :315-430 ,335-450 ,375-500 ,410-550 ,490-630 (obN/mm2); qi its elongation rates were: 33,31,26,24,20 ( 0.5%). The material Q235A and Q235B What's the difference?
Q235A and Q235B steel all are carbon steel. In the national standard GB700-88 in the material of the Q235A and Q235B distinction mainly carbon steel, the material for the carbon content of the material Q235A at between 0.14-0.22%; Q235B the impact of the material do not do experiments, but Regular temperature impact test, V-notch. Relatively speaking, made of Q235B steel is much better than the mechanical properties of materials for the Q235A steel. In general, steel profiles in the finished product prior to shipment are m ade in the identification card on the logo. Us ers can determine their identity cards on the material is Q235A, or Q235B, or other materials.
Cold Rolled Steel Strip: Q195, Q215, Q235 Chemical Com position and Mechanical Properties refer to the table:
Chemical Composition %
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Mechanical Properties Yield Tensile Elongation Strength Strength % Mpa Mpa
Steel Brand
C
Si
Mn
Q195
0.060.12
<=0.30
0.250.50
<=0.045 <=0.050
>=33
>=195
315-430
Q215
0.090.15
<=0.30
0.250.55
<=0.045 <=0.050
>=31
>=215
335-450
Q235
0.140.22
<=0.30
0.300.65
<=0.045 <=0.050
>=26
>=235
375-500
P
S
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