Stainless Steel 405 (UNS S40500)

Yaang Stainless inventory includes Alloy 405 (UNS S40500) in  Stainless Steel Pipes.  Other product forms such as Stainless Steel Flanges, Stainless Steel Pipe Fittings.

Overview

General Properties

Alloy 405 is a 12% chromium stainless steel designed to be used in the as-welded condition. Unlike the other grades of 12% chromium stainless, 405 is not vulnerable to extensive hardening through air cooling from high temperatures.

Specifications: UNS S40500

Applications:

Applications that frequently use alloy 405 include, but are not limited to:

• Steam nozzles
• Partitions
• Annealing boxes
• Quenching racks
• Fabrications that cannot be annealed after welding

 

Standards:

• ASTM/ASME: UNS S40500
• EURONORM: FeMi35Cr20Cu4Mo2
• DIN: 2.4660

Resistance

Corrosion Resistance

• Same corrosion resistance of Type 410 Steel
• Used in situations where more weldability is desired than Type 410

Processing

Machinability

• Type 405 can be easily machined due to its soft and ductile characteristics

 Weldability

• Can be welded using shielded fusion and resistance techniques
• Oxyacetylene is not recommended
• Post weld annealing will maximize ductility

Properties

Chemical Properties:

	C	Cr	Fe	Mn	Si	S	P	Ni	Al
405	0.08 max	min: 11.5 max: 14.5	balance	1.0 max	1.0 max	0.03 max	0.04 max	0.50 max	min: 0.1 max: 0.3

Mechanical Properties:

Grade	Tensile Strength ksi (MPa) min	Yield Strength 0.2% offset ksi (MPa) min	Elongation (% in 50mm) min	Hardness (Brinell) MAX	Hardness (Rockwell B) MAX
405	60 (415)	25 (170)	20	179	88

Physical Properties:

Denstiy lbm/in3	Coefficient of Thermal Expansion (min/in)-°F		Thermal Conductivity BTU/hr-ft-°F	Specific Heat BTU/lbm -°F	Modules of Elasticity (annealed)2-psi
at 68 °F	at 68 – 212°F	at 68 – 1832°F	at 200°F	at 32 – 212°F	in tension (E)
0.279	9.2	20.5	416	0.11	28 x 106

Next: Stainless Steel 409 (UNS S40900)
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