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Steel Grade 25 Structural Steel Tubing Hot Rolled / Cold Drawn 16mm - 30mm

Basic Information
Place of Origin: China
Brand Name: Torich
Certification: CE PED
Model Number: GB/T 8162
Minimum Order Quantity: 1000kg
Price: 600-1000 USD per ton
Packaging Details: In bundles with seaworthy packing
Delivery Time: 3-4 weeks
Payment Terms: L/C, T/T
Supply Ability: 50000tons per year
Detail Information
Heat Treatment: Hot Rolling & Cold Drawn Material: 20 45 Q345 20Cr 40Cr 20CrMo 30-35CrMo 42CrM
Test: Bending Test/ Hardness Test/ Impact Test And So On
High Light:

structural steel tubing

,

cold formed steel tube


Product Description

GB/T8162 Structural Seamless Steel Tube with Steel Grade 20 45 Q345 20Cr 40Cr 20CrMo 30-35CrMo 42CrM

 

Heat Treatment: Hot Rolling & Cold Drawn

 

Tolerance of the OD &WT:

OD Tolerance:

Production Method OD Tolerance
Hot Rolling(Extrusion) ±1% or ±0.50mm
Cold Drawn(Cold Rolled) ±1% or ±0.30mm

 

Tolerance for wall thickness:

 

1.Wall thickness tolerance of Hot Rolling steel tube:

Production Method OD (DN) WT/OD Tolerance
Extruded tube ≤102 / ±12.5% or ±0.40mm
>102 ≤0.05 ±15% or ±0.40mm
>0.05-0.10 ±12.5% or ±0.40mm
>0.10

+12.5%

-10%

Heat expanding steel tube / ±15%

 

2.Wall thickness tolerance of Cold Drawn(Cold Rolled) steel tube:

Production Method WT Tolerance
Cold Drawn(Cold Rolled) steel tube ≤3 +15%/-10% or ±0.40mm
>3

+12.5%

-10%

 

Bending tolerance:

WT≤15mm, Bending≤1.5mm/m

WT>15mm~30mm, Bending≤2.0mm/m

WT>30mm/OD≥351mm, Bending≤3.0mm/m

 

Ovality and Wall unevenness:

The ovality and wall unevenness should be no more than 80% of the OD and wall thickness.(Or according to customer’s request)

 

mechanical property

Steel Grade

Tensile strength

Rm

N/mm2(MPa)

Yield Strength

Rp0.2

N/mm2(MPa)

Elongation

A %

Wall Thickness
≤16mm >16~30mm >30mm
10 ≥335 ≥205 ≥195 ≥185 ≥24
15 ≥375 ≥225 ≥215 ≥205 ≥22
20 ≥410 ≥245 ≥235 ≥225 ≥20
25 ≥450 ≥275 ≥265 ≥255 ≥18
35 ≥510 ≥305 ≥295 ≥285 ≥17
45 ≥590 ≥335 ≥325 ≥315 ≥14
20Mn ≥450 ≥275 ≥265 ≥255 ≥20
25Mn ≥490 ≥295 ≥285 ≥275 ≥18
Q235 A 375~500 ≥235 ≥225 ≥215 ≥25
B
C
D
Q275 A 415~540 ≥275 ≥265 ≥255 ≥22
B
C
D
Q295 A 390~570 ≥295 ≥275 ≥255 ≥22
B
Q345 A 470~630 ≥345 ≥325 ≥295 ≥20
B
C ≥21
D
E
Q390 A 490~650 ≥390 ≥370 ≥350 ≥18
B
C ≥19
D
E
Q420 A 520~680 ≥420 ≥400 ≥380 ≥18
B
C ≥19
D
E
Q460 C 550~720 ≥460 ≥440 ≥420 ≥17
D
E

 

Test:

  1. Bending test
  2. Hardness test
  3. Impact test
  4. Squeezing test
  5. Non-destructive test

 

Steel Grade 25 Structural Steel Tubing Hot Rolled / Cold Drawn 16mm - 30mm 0 Steel Grade 25 Structural Steel Tubing Hot Rolled / Cold Drawn 16mm - 30mm 1

 

Reference Standard:

GB/T 222 Tolerance of chemical composition for the steel products.

 

GB/T 223.3 Chemical analysis method for steel and alloy steel. Two antipyrine methane phosphomolybdate gravimetric method for the determination of phosphorus content.

 

GB/T 223.5 Chemical analysis method for steel and alloy steel. Reduced silicon molybdate spectrophotometric determination of acid-soluble Silicon Content.

 

GB/T 223.8 Chemical analysis method for steel and alloy steel. Determination of aluminum content of sodium chloride separated -EDTA volumetric method.

 

GB/T 223.9 Determination of aluminum content for steel and alloy steel. Chromium Azure S Spectrophotometry.

 

GB/T 223.11 Chemical analysis method for steel and alloy steel. Determination of chromium content ammonium persulfate oxidation volumetric method.

 

GB/T 223.12 Chemical analysis method for steel and alloy steel. Spectrophotometric determination of chromium content diphenyl hydrazine - separation of sodium carbonate.

 

GB/T 223.13 Chemical analysis method for steel and alloy steel. Determination of vanadium content ammonium ferrous sulfate titration.

 

GB/T 223.14 Chemical analysis method for steel and alloy steel. Tantalum extraction reagent spectrophotometric determination of vanadium content.

 

GB/T 223.16 Chemical analysis method for steel and alloy steel. Spectrophotometric determination of titanium content chromotropic acid.

 

GB/T 223.18 Chemical analysis method for steel and alloy steel. Sodium thiosulfate and Separation - iodometry determination of copper content.

 

GB/T 228 Metallic materials at room temperature tensile test method (GB/T 228-2002,eqv ISO 6892:1998)

 

GB/T 229 Metal Charpy pendulum impact test method ( GB/T 229-2007, ISO 148-1:2006, MOD)

 

GB/T 231.1 Brinell hardness test Part 1: testing method (GB/T 231.1-2002, ISO 6506-1:1999, EQV)

 

GB/T 244 Metal pipe bending test method (GB/T 244-2008, ISO 8491:1996, IDT)

 

GB/T 246 Test methods for flattening the metal tube (GB/T 246-2007, ISO 8492:1998, IDT)

 

GB/T 699 Structural carbon steel in good quality.

 

GB/T 1591 High strength low alloy structural steel

 

GB/T 1591 High strength low alloy structural steel

Contact Details
Christine Guan

Phone Number : +8618968237897

WhatsApp : +8613736164628