Nuclear
Nuclear material supply is governed as much by quality assurance and traceability as by metallurgy. Grades are selected for resistance to irradiation-assisted stress corrosion cracking and for low cobalt content to limit activation, and every heat requires documentation to the applicable code section.
What gets specified in nuclear
Ordered by how commonly they are called for in this sector.
- UNS S34700 / S34709347 / 347HPREN 19
Stabilised with niobium rather than titanium. Preferred where weld filler purity matters.
- UNS S32100 / S32109321 / 321HPREN 19
304 stabilised with titanium. Resists sensitisation in the 425–815 degrees C range.
- UNS S31600 / S31603316 / 316LPREN 25
304 plus 2–3% molybdenum. The standard answer to chlorides and mild acids.
- UNS S30400 / S30403304 / 304LPREN 19
The default austenitic stainless. 18% chromium, 8% nickel, no molybdenum.
- UNS N06600Inconel 600
Nickel-chromium-iron alloy. Resists oxidation and chloride SCC to high temperature.
Applications
04- Primary and secondary circuit piping
- Steam generator tubing
- Reactor internals hardware
- Fuel handling components
Governing standards
04- ASME Section III
- ASTM A312
- ASTM A213
- RCC-M
Verification available
10- Spectrometer
- Chemical Testing Laboratory
- Positive Material Identification (PMI)
- Spectro Test
- Tensile Testing Machine
- Hardness Testing Machine
- Portable Hardness Tester
- Flattening Test
- Reverse-Bend Test
- Hydrostatic Test Machine
What nuclear buys
Other industries
Supplying into nuclear?
Send the specification and service conditions. We will confirm the grade, the availability and the documentation you will need.