Square steel Pipe
2012-01-11 21:08 | 阅读（）
Standard：
ASTM A500, GB6728
Steel grade:
ASTM A500: A, B, C
GB6728：Q195，Q215，Q235，Q345
Size of Pipe:
*Remark: Besides below sizes, we also can arrange production based on requirement of customers
|
SIZE(mm) |
THICKNESS(mm) |
|
10×10 |
0.6-1.0 |
|
12×12 |
0.6-1.0 |
|
16×16 |
0.6-1.2 |
|
19×19 |
0.6-1.5 |
|
20×20 |
1.6-1.5 |
|
25×25 |
1.0-2.75 |
|
30×30 |
1.0-2.75 |
|
32×32 |
1.0-3.0 |
|
38×38 |
1.0-3.0 |
|
40×40 |
1.0-3.5 |
|
50×50 |
1.0-5.0 |
|
60×60 |
1.0-6.0 |
|
63.5×63.5 |
1.0-6.0 |
|
70×70 |
1.5-6.0 |
|
75×75 |
1.5-6.0 |
|
80×80 |
2.0-6.0 |
|
90×90 |
2.0-6.0 |
|
100×100 |
2.3-6.0 |
|
120×120 |
4.0-6.0 |
|
125×125 |
4.0-6.0 |
|
150×150 |
4.0-8.0 |
|
200×200 |
6.0-12 |
|
250×250 |
6.0-12 |
|
300×300 |
6.0-12 |
|
400×400 |
6.0-12 |
Standard: ASTM A500
Chemical Composition(%)
|
Chemical Requirement |
||||
|
|
Composition % |
|||
|
|
Grade A |
Grade B |
||
|
|
Heat |
Product |
Heat |
Product |
|
Element |
analysis |
analysis |
analysis |
analysis |
|
Carbon max |
0.26 |
0.3 |
0.22 |
0.26 |
|
Manganese max |
… |
… |
1.4 |
1.45 |
|
Phosphorus, max |
0.035 |
0.045 |
0.03 |
0.04 |
|
Sulfur max |
0.035 |
0.045 |
0.02 |
0.03 |
|
Copper, when copper steel is specified, min |
0.20 |
0.18 |
0.2 |
0.18 |
|
Where an ellipsis (...)appears in this table, there is no requirement |
||||
|
For each reduction of 0.01 percentage point below the specified maximum for carton, and increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.6% by product analysis |
||||
Mechanical Properties
|
Tensile Requirement |
||
|
|
Grade A |
Grade B |
|
Tensile strength, min, psi (Mpa) |
48000 (400) |
70000 (483) |
|
Yield strength, min, psi (Mpa) |
36000 (250) |
50000 (345) |
|
Elongation in 2 in. (50.8mm), min, % |
23 |
23 |
GB6728：
|
Steel Grade |
CHEMICAL COMPOSITION |
MECHANICAL PROPERTIES |
||||||
|
|
C (%) |
Si (%) |
Mn (%) |
P(%) Max |
S (%) Max |
YS(Mpa) Min |
TS(Mpa) Min |
El (%) Min |
|
Q195 |
0.06-0.012 |
0.3 |
0.25-0.5 |
0.45 |
0.5 |
195 |
315 |
22 |
|
Q215 |
0.09-0.15 |
0.3 |
0.25-0.55 |
0.45 |
0.5 |
215 |
335 |
22 |
|
Q235 |
0.12-0.22 |
0.3 |
0.3-0.7 |
0.45 |
0.45 |
235 |
375 |
20 |
|
Q345 |
0.20 |
0.55 |
1.0-1.6 |
0.45 |
0.45 |
345 |
510 |
21 |
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