Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| 10 % | A | A | |
| 30 % | A | A | |
| 40 % | A | A |
Material comparison at 20 °C
Resistance overview
SS 316 shows excellent resistance to Formaldehyde Solution across all 3 tested concentrations (10 %, 30 %, 40 %) at 20 °C, making it a reliable choice for storage, transfer, and handling applications involving this chemical at any of the tested strengths. The rating remains stable between 20 °C and 50 °C, which means this material can also handle moderately elevated process temperatures without additional risk.
Application context
Formaldehyde Solution is commonly encountered in chemical storage and water treatment. SS 316 (Stainless steel 1.4401 (AISI 316)) is a metal typically used for vessels, heat exchangers, fittings and structural components. The compatibility between these two is therefore an important consideration for engineers and procurement teams selecting containment, transfer, or processing equipment.
Practical recommendation
SS 316 can be used with confidence for Formaldehyde Solution containment and handling. The A rating indicates that the material shows no significant change in weight, dimensions, or mechanical properties after prolonged contact under test conditions. This holds true at both 20 °C and 50 °C, giving a good safety margin for typical process environments.
Did you know?
Temperature is often the deciding factor when selecting materials for Formaldehyde Solution: even materials rated A at 20 °C may lose performance at elevated temperatures.
Materials rated A or B at 20 °C
Based on the row for 40 %, 20 °C.
- Thermoplastics
- HDPE A, PP A, PVC Rigid B, LDPE B, Nylon (PA) A, Acetal (POM) A, Polycarbonate A, Polysulfone B, PETG A, PMP A
- Fluoropolymers
- PTFE A, PVDF A, FEP A, ECTFE/ETFE A
- Elastomers
- EPDM A
- Metals
- SS 304 A, Aluminium A
About SS 316
Stainless steel 316 (1.4401) contains molybdenum, which improves resistance to chlorides over 304. Hydrochloric acid and other halide acids still cause pitting.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.