WEATHERING, CORROSION RESISTANT AND FIRE RESISTANT

Langsda Metal Products Co.,Ltd successfully developed   weathering steel with various chemical composition and mechanical properties by using hot rolling, control rolling, TMCP and heat treatment process etc. Maximum thickness limit in Chinese specification. Q355GNH has been delivered to many customers and obtained good reputation.


Typical Steel Grands/Specifications


Grades


Specifications


Size Range


Delivery Condition


Q235NH series

GB/T4171

≤100

AR


Weathering Steel

Q355NH series

GB/T4171

≤100

CR、N

Q415NH series

GB/T4171

≤60

CR、TMCP

Q460NH series

GB/T4171

≤60

TMCP

Q355GNH series

GB/T4171

≤50

CR、N

A588 GrA

ASTM A588/A588M

≤100

CR、N

A588 GrB

ASTM A588/A588M

≤100

CR、N

Corten B

JX62-117-2011-01

≤110

CR、N

A871Gr60

ASTM A871/A871M

≤60

CR、TMCP

A871Gr65

ASTM A871/A871M

≤40

TMCP

S355JOW、S355J2W

EN10025

≤100

CR、N

S355JOWP、S355J2WP

EN10025

≤50

CR、N

Corrosion Resistant Steel

09CrCuSb

Technical Agreement

≤40

CR、N

NS1-1、NS1-2、NS1-3

Technical Agreement

≤40

CR、N

Fire Resistant Steel

XC400-FR

Technical Agreement

≤50

CR

XC490-FR






Properties Of Typical Grades

  1. A871Gr65

a. Chemical Composition

Steel/Grades

Chemical Composition(wt%)

C

Si

Mn

P

S

Cr

Ni

Mo

V

Cu

A871Gr65

≤0.19

0.3-0.65

0.8-1.35

≤0.04

≤0.05

0.4-0.7

≤0.04

-

0.02-0.1

0.25-0.4


b. Mechanical Properties

Steel/Grades

Size  Range(mm)

Rel(Mpa)

Rm(Mpa)

A(%)

29K V2 (J)

A871Gr65

≤40

≥450

≥550

17

≥21

  1. 09CrCuSb

  2. Chemical Composition

Grades

Chemical Composition(wt%)

C

Si

Mn

P

S

Cr+Ni+Cu

Sb

09CrCuSb

≤0.16

0.20-0.70

0.60-1.30

≤0.04

≤0.03

≤1.40

0.04-0.10


b. Mechanical Properties

Steel/Grades

Size  Range(mm)

Rel(Mpa)

Rm(Mpa)

A(%)

Bend

09CrCuSb

≤40

≥315

≥440

≥22

180°     d=3a,OK

Product Catalog