Carbon Steel Rectangular Pipes for General Structure
chemical composition
Designation of grade |
Chemical Composition |
||||
C |
Si |
Mn |
P |
S |
|
STKR 400 |
0.25 max. |
- |
- |
0.040 max. |
0.040 max. |
STKR 490 |
0.18 max. |
0.55 max. |
1.50 max. |
0.040 max. |
0.040 max. |
JIS G3466 STKR400 mechanical property
Designation of grade |
|||
Tensile strength N/㎟{kgf/㎟} |
Yield point or proof stress N/㎟{kgf/㎟} |
Elongation % (No.5 test piece) |
|
STKR 400 |
400 {41} min. |
245 {25} min. |
23 min. |
STKR 490 |
490 {50} min. |
325 {33} min. |
23 min. |
Grade |
Yield strength MPa |
Tensile strength MPa |
Elongation % |
STKR400 |
≥400 |
≥245 |
≥23 |
The tolerances on dimensions are established in accordance with JIS G 3466.
Characteristics |
|
Tolerances |
|
Outside dimensions of side |
|
(H,B |
|
H : Longest side |
|
(100mm |
|
B : Shortest side |
|
|
|
Wall thickness(T) |
|
(T |
|
|
|
(3mm |
|
Unevenness of the flat portions of each side |
|
(H,B |
|
|
|
(100mm |
|
Squareness of sides |
|
90 |
|
Corner dimension(S) |
|
S |
|
Straightness |
|
0.3% in total length |
|
Length |
|
0, +50mm (Private standard tolerance) |
|
NOTE |