Most data centre cooling loops are well served by 316L stainless steel. However, where coolant chemistry, water quality or a 20-year-plus design life with high chlorides, aggressive biocide regimes, heat re-use circuits with elevated temperatures can all create a challenging environment. This is where the Neumo Ehrenberg Group special alloy range can help with special grades including: 904L, 6MO, Alloy 22… and more. Link: Materials – Stainless Steel & Special Alloys in Stock
Typical size from ½” to 4” and above.
Choosing the right grade
| Grade | When to specify it |
|---|---|
| 304 / 1.4301 | Benign treated-water and glycol loops, cost-optimised for service water duty. |
| 316L / 1.4404 | This composition makes it ideal for use in demanding environments, such as the chemical and pharma industry. 316L belongs to the austenitic class of stainless steels, which are known for their excellent toughness, weldability, grindability and non-magnetic properties. |
| 904L/ 1.4539 | The material 1.4539 is an austenitic stainless steel known for its excellent corrosion resistance in extremely aggressive environments |
| 6Moly/ 1.4529 | The material 1.4529 is a highly alloyed, austenitic stainless-steel grade often referred to as a “super austenitic” steel. |
| Alloy 22/ 2.4602 | The material 2.4602, also known as Alloy 22, is a highly corrosion-resistant nickel-chromium-molybdenum alloy. This alloy is characterized by excellent resistance to both oxidizing and reducing chemical environments, making it particularly well-suited for extreme conditions such as acid processes in the chemical industry. |
| …more alloys and information can be found at Materials – Stainless Steel & Special Alloys in Stock | |
Range details
Our range covers many standards DIN/EN/ANSI/ASME/BS and includes special alloy tube ½” – 6” SF1/SF4, complying with ASME BPE A270 and other ASME equivalents with matching fittings and connections available across the range.
Please refer to sales below with your enquiries and questions.
Frequently asked questions
Is 304 ever wrong for a coolant loop?
It’s fine for benign duty, but many end-client standards simply mandate 316L for TCS (Technology System Cooling) — check the basis of design before value-engineering the grade.
Do glycol coolants attack stainless?
No — propylene glycol itself is benign; it’s the water quality, chlorides and additive package that drive grade selection.
Can you advise on grade selection?
Send us the coolant spec and water analysis and we’ll recommend against it.
Talk to us about your project
Kevin Windsor — Product Manager, Data Centre Liquid Cooling
kw@neumo.co.uk · 01952 583 999