20Mn 25Mn Q275 Q295 Cold drawn and Cold rolled Seamless steel tubes for structural purpose GB/T 8162

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 .

Inspection test.

1.Hardness test

2.Impact test

3.Flattening test

4.Bending test

5.Visual Surface check

7,Nondestructive test