Name: Stainless Steel Seamless Tube
Highlight: ERW Steel Tube, thick wall aluminum tubing

GB/T 1591-2008, GB709 Alloy Black Painting Seamless Steel Pipe 0.1mm – 20mm For Industry

Quick Detail:

Standard: GB/T 1591-2008, GB709
Steel Grade: Grade A, Grade B, Grade C, Grade D, Grade E
Size: Out Diameter : 20-200mm
Thickness: 0.1-20mm
Length: 3-8m



GB/T 1591-2008, GB709

Steel grade

Grade A, Grade B, Grade C, Grade D, Grade E

Outside diameter






End protection

Plastic caps

Outside coating

Black painting, anti-corrosion oil, galvanized or as per required by customers


wooden boxes, plastic bags or according to different customers’ requests

Inspection and test

UT, ET, HT, RT, etc. and others according to the standard, or as the requests of the customers

Delivery condition

Annealed, Normalized, Normalized, and tempered

Chemical Composition(%):

Grade C Mn Si Al S P
A ≤0.20 ≤1.70 ≤0.50 ≤0.035 ≤0.035
B ≤0.20 ≤1.70 ≤0.50 ≤0.035 ≤0.035
C ≤0.20 ≤1.70 ≤0.50 ≥0.015 ≤0.030 ≤0.030
D ≤0.18 ≤1.70 ≤0.50 ≥0.015 ≤0.025 ≤0.030
E ≤0.18 ≤1.70 ≤0.50 ≥0.015 ≤0.020 ≤0.025

Mechanical properties:

Grade Tensile
B 490-675 ≥345 ≥21
C 490-675 ≥345 ≥22
D 490-675 ≥345 ≥22
E 490-675 ≥345 ≥22


Q345 seamless steel pipe can be used for transportation of oil, gas or fluid, construction, electricity, machine-building industry, chemical industry, petroleum, traffic, etc.

Competitive advantage:

Jiangsu Hengyang Steel Pipe Co., Ltd is a pipe manufacturing, we have the latest machine and the professional technicians. We aim at offering high quality but competitive price pipe for our global customers.

Product Details:

Place of Origin: Shanghai
Brand Name: hengyang
Certification: ISO
Model Number: HC

Payment & Shipping Terms:
Minimum Order Quantity: 5 tons
Packaging Details: According to per customers’ require
Delivery Time: 30-60 days after the advance payment to the account(exclusion the national holiday)
Payment Terms: 30% advance, the balance is paid before delivery
Supply Ability: 800 tons per month