equivalent metallurgical conditions to those obtained in the hot formed product.
|
Chemical Composition for Hot Finished Circular Hollow Section |
|
|
Chemical composition – ladle analysis |
|
|
Hot Finished Circular Hollow Section |
|
|
Specification |
EN10210 S355J2H Part 1: 2006 |
|
% max |
|
|
Carbon |
0.22 |
|
Silicon |
0.55 |
|
Manganese |
1.60 |
|
Sulphur |
0.030 |
|
Phosphorus |
0.030 |
|
Carbon equivalent (CEV) mat T≤16mm |
0.45 |
|
Type of deoxidation |
Fully killed steel |
|
Mechanical Properties for Hot Finished Circular Hollow Section |
|
|
Specification |
EN10210 S355J2H Part 1: 2006 |
|
Tensile Strength Rm N/mm2: 3 ≤ T ≤ 100mm |
470 – 630 |
|
Yield Strength ReH Min, N/mm2: T ≤ 16mm |
355 |
|
Min Elongation % T ≤ 40mm on gauge length 5.65. √S0 |
22 |
|
Impact properties Minimum Ave energy (J) at -20°C |
27 |
|
Dimensional tolerances EN10210: 2006 Part 2 |
||
|
Square/Rectangular |
Circular/Ovals |
|
|
Outside dimension (D B and H) |
±1% with a min of ±0.5mm |
Circular ±1% with a min of ±0.5mm and maximum of ±10mm |
|
Thickness (T) |
-10% Note. Positive deviation limited by mass tolerance |
-10% Note. Positive deviation limited by mass tolerance |
|
Squareness of side |
90 degrees ±1 degree |
- |
|
External corner profile |
2T max at each corner* (EN10210 has 3T max). |
- |
|
Concavity/convexity (x) |
±1% of the side, measured independently of the tolerance on the outside dimension |
- |
|
Twist (V) |
2mm plus 0.5mm/m max. Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken. |
– |
|
Mass (M) |
±6% on individual lengths |
±6% on individual lengths |
|
Straightness |
Max 0.2% of total length & 3mm over every 1m length |
Maximum 0.2% of the total length & 3mm over every 1m length. (The permitted tolerance is twice the value for H<250) |
|
Length |
+150mm/-0mm |
+150mm/-0mm |
* Excludes RHS 250 x 200, which is 3T max at each corner in line with EN10210
|
EN10210 CHS-Circular hollow sections – length and tolerances |
||||
|
Outside Diameter |
Welded |
|||
|
mm |
Thickness mm |
Standard mill lengths m |
Special mill lengths m* |
Tolerance mm |
|
21.3 – 42.4 |
All |
6.0, 6.4, 7.5 |
5.4 – 7.5 |
+150-0 |
|
48.3 |
All |
6.0, 6.4, 7.5 & 10.0 |
5.4 – 14.6 |
+150-0 |
|
60.3 – 114.3 |
All |
6.0, 6.4, 7.5 & 10.0 |
5.0 – 14.6 |
+150-0 |
|
139.7 |
All |
7.5 & 10.0 |
6.0 – 14.5 |
+150-0 |
|
168.3 – 193.7 |
All |
7.5, 10.0 & 12.0 |
6.0 – 14.6 |
+150-0 |
|
219.1 – 508.0 |
All |
10.0 & 12.0 |
6.0 – 14.6 |
+150-0 |
