Press release
Kazakhstan Refinery Project - GOST 21646 LO-70-1 Brass Tubes in Full Production
Order Details:
SN
Commodity Name
Standard & Material Code
Dimensions (mm)
Quantity
Out Diameter
Thickness
Length
Meters
PCS
KGS
1
BraSs Tube
GOST 21646 LO-70-1
19
1
4550
40136
8821
19361
TOTAL
40136
8821
19361
Image: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/9b02da11557731f9e1680927e89df2b5.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/942b819c0829955925c36739575fe2eb.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/20574f21d9a2f79352afe948d76fbae5.jpg
Technical Highlights
The customer required the product to be manufactured strictly in accordance with Russian Standard GOST 21646 LO-70-1, covering chemical composition, heat treatment, and mechanical properties. The client specifically noted that a previous batch of tubes purchased from another Chinese supplier failed acceptance in Kazakhstan due to inconsistent chemical composition.
To ensure 100% compliance and performance reliability, EZ STEEL arranged a dedicated smelting batch exclusively for this order. The alloy's precise composition is carefully controlled, as detailed below:
CHEMICAL COMPOSITION
Reference standard
Material
Cu
Sn
Pb
Fe
As
Zn
BI
P
S
NI
ASTM B111
C44300
70.0-73.0
0.9-1.2
0.070
0.060
0.02-0.06
Rem.
/
/
/
/
GOST 21646
LO-70-1
69-71
1-1.5
0.07
0.07
/
27.2-30
0.002
0.01
GB/T 5231
HSn70-1
69-71
0.8-1.3
0.050
0.100
0.03-0.06
Rem.
/
/
/
/
Image: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/dbc6442bb49e132f3bd146f1c4c1eb81.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/349aa2c7629dd3653979651471f21605.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/20fe849cee0656b75dec7e81a242f92e.jpg
Commercial Progress
After multiple rounds of discussion, the client decided to visit our copper tube casting, extrusion, and drawing workshops in early August for a technical inspection. Following the visit, they confirmed the quality and production capability of EZ Metals and placed an initial 19-ton order as the first batch.
Given the client's tight delivery schedule of 25 days, our production and scheduling teams coordinated closely to ensure timely delivery. As of September 22, 2025, part of the finished tubes have already been packed and prepared for shipment.
Image: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/ab7c62ae10140f6a3a85c1f0b103aeba.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/859feb1c570f9fb73685725f5e7b982b.jpgImage: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-10/b25a45293f507e24f466078a94aee9b2.jpg
Commitment to Quality and Delivery
At EZ STEEL, we take pride in our promise: delivering high-quality products on schedule. Each batch of GOST 21646 brass tubes is produced under strict process control, ensuring consistent alloy performance and durability under refinery operating conditions.
Image: https://ecdn6.globalso.com/upload/p/3648/image_other/2025-06/juheye1.jpg
#GOST 21646 Brass Tube #LO-70-1 Brass Tube #CuZnSn Alloy Tube [https://www.ezindustrialpipe.com/alloy-tube/] #CuZn Copper Alloy #Copper Tube Supplier #C44300 Tube #Brass Tube Manufacturer China #Kazakhstan Refinery Project
Media Contact
Company Name: EZ STEEL INDUSTRIAL CO., LTD
Email:Send Email [https://www.abnewswire.com/email_contact_us.php?pr=kazakhstan-refinery-project-gost-21646-lo701-brass-tubes-in-full-production]
Country: China
Website: https://www.ezindustrialpipe.com/
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