Torich International Limited
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20Mn 25Mn Q275 Q295 Cold drawn and Cold rolled Seamless steel tubes for structural purpose GB/T 8162
Torich produce seamless steel tubes as per standard GB/T 8162 applying in Mechanical contructure and general purpose of structure. produced by cold drawn and cold rolled with carbon and alloy steel,Like 10,20,20Mn,25Mn,20Cr,40Cr 15CrMo 45Mn2 etc.
Detail spec:
Size range: OD 3-420mm WT 0.5-50mm L:3-12.5m
Material:Carbon steel:10,20,45,25Mn,Q295,Q345,40Mn2,20Cr,40Cr,15CrMo etc.
Alloy steel:40Mn2,20Cr,40Cr,15CrMo etc
Delivery condition: Heat treatment Annealing ,Normalising,Tempering.
If not specificate from customer ,We will as per below Tolerance .
OD +/-1%OD or 0.30mm
WT below 3mm :+15%S ,-10%S or +/-0.15mm
above 3mm:+12.5% Sor -10%S
Length below 6000mm:+10mm,0
above 6000mm:+15mm,0
If not specificate from customer ,We will as per below straightness .
| Spec WT/mm | Straightness/mm/m |
| below 15mm | 1.5 max |
| 15-30mm | 2.0 max |
| above 30mm and D above 351mm | 3.0 max |
Inspection test.
1.Hardness test
2.Impact test
3.Flattening test
4.Bending test
5.Visual Surface check
7,Nondestructive test