SPA-H weather resistance steels for containers

SPA-H weather resistance steels for containers

06-05 26

SPA-H weather resistance steels for containers

 

The container has strict requirements on the atmospheric corrosion resistance of steels. The largest consumption of containers' steel is a high value-added variety with relatively stable prices. With the growth of global trade volume, the demand for container steels in China have also been keeping a relatively high growth in recent years. Many main mills in China have adapted to the market demand and develop to produce hot-rolled wide-band steel for SPA-H containers. The developed product adopts a design with reasonable composition of Cu, P, Cr and Ni in low carbon steels. So The steel SPA-H has excellent corrosion resistance with accurate dimension, good surface and good formability performance, which satisfy the requirements of containers' steels better.


SPA-H is one grade of specification JISG3125  "Superior atmospheric corrosion resisting rolled steels"

Chemical Composition (%)

Grade

C

Si

Mn

P

S

Cu

Cr

Ni

SPA-H

≤0.12

0.20-0.75

≤0.60

0.07-0.15

≤0.035

0.25-0.55

0.30-1.25

≤0.65

Mechanical Properties:

Grade

Thickness

Yield Strength

MPa

Tensile Strength

MPa

Elongation

%

Bend Angles

Bend Diameter

SPA-H

≤6mm

≥355

≥490

≥22

180º

0.5 *thickness

>6mm

≥355

≥490

≥15

180º

0.5 *thickness

Tolerance of Thickness


Size (mm)

Tolerance

Width

700-1350

-0~+20

Thickness

3.15≤a<4.00

+/-0.24

4.00≤a<5.00

+/-0.45


The production process of SPA-H container steel is:

hot metal pretreatment -- 120 t top and bottom combined blowing converter smelting -- LF refining -- slab continuous casting (160 mm × (1 055 ~ 1 360) mm) -- hot delivery -- heating -- high pressure water descaling -- (E1, four rolls R1) reversible rough rolling 5 times -- hot coil box -- unwinding -- flying shear head and tail -- E2 before high pressure water descaling -- (E2, F1 ~ F6) finishing rolling Units -- laminar cooling -- coiling -- baling -- transportation -- spray number -- collection and stacking.


Usage of Weather Resistance Steesl:

Besides used for the containers' production, the SPA-H steels are also used for air preheater, economizer, railway carriage, bridge building , construction and so on.


Shanghai All-Win Steel Company always keep thousands tons of weather resistance steels  in our warehouse with grade SPA-H, 09Cu, 05 Cu and so on. And we can offer the original widths in 1000mm, 1250mm, 1500mm, 2000mm etc., and we can also help to split or cut into different sizes accordingly.





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