Stainless Steel 410HT (UNS S41000)

Alloy 410 HT is the basic, general purpose,  heat treated version of Type 410. It is a martensitic type, used for general purpose, where corrosion is not severe. Alloy 410 contains a minimum of 11.5% chromium which is just sufficient enough to demonstrate corrosion resistance properties in mild atmospheres, steam, and many mild chemical environments. .

Specifications: UNS S30400 / S30403

Applications:

Applications requiring moderate corrosion resistance and high mechanical properties are ideal for Alloy 410HT. Examples of applications that frequently used Alloy 410HT include:

• Cutlery
• Steam and gas turbine blades
• Kitchen utensils
• Bolts, nuts, screws
• Pump and valve parts and shafts
• Mine ladder rugs
• Dental and surgical instruments
• Nozzles
• Hardened steel balls and seats for oil well pumps

 

Standards:

• ASTM/ASME: UNS S41000
• EURONORM: FeMi35Cr20Cu4Mo2
• DIN: 2.4660

Resistance

Corrosion Resistance:

• Good corrosion resistance to atmospheric corrosion, potable water, and to mildly corrosive environments
• Its exposure to everyday activities (sports, food preparation) is generally satisfactory when proper cleaning is performed after exposure to use
• Good corrosion resistance to low concentrations of mild organic and mineral acids

Processing

Welding Characteristics

• Readily welded by all standard methods
• To reduce the risk of cracking, it is suggested to pre-heat the work piece to 350 to 400^oF (177 to 204^oC)
• Post weld annealing is recommended to retain maximum ductility

Heat Treatment

• The proper hot work range is 2000 to 2200^oF (1093 to 1204^oC)
• Do not work this material below 1650^oF (899^oC)

Properties

Chemical Properties:

	C	Mn	Si	P	S	Cr	Ni
410HT	0.15 max	1.00 max	1.00 max	0.04 max	0.03 max	min: 11.5 max: 13.5	0.50 max

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
410HT	65 (450)	30 (205)	20	217	96

Mechanical Properties of Heat Treated 410:

Heat Treatment	T410 (0.14%C) Hardened 1800°F (982°C)
	Rockwell Hardness	0.2% YS, Ksi (MPa)	UTS, Ksi (MPa)
Annealed*	81 HRB	45.4  (313)	80.4  (554)
Hardened & Tempered 400°F (204°C)	43 HRC	156.1  (1076)	202.9  (1399)
Hardened & Tempered 550°F (288°C)	40 HRC	148.3  (1022)	187.0  (1289)
Hardened & Tempered 600°F (316°C)	40 HRC	148.8  (1026)	186.1  (1283)
Hardened & Tempered 800°F (427°C)	41 HRC	132.9 (916)	188.5  (1300)
Hardened & Tempered 900°F (482°C)	41 HRC	122.6 (845)	154.3  (1063)
Hardened & Tempered 1000°F (538°C)	35 HRC	127.9  (882)	154.3  (1063)
Hardened & Tempered 1200°F (649°C)	98 HRB	85.5  (589)	111.2  (767)

 Physical Properties:

Density lbm/in3	Thermal Conductivity (BTU/h ft. °F)	Electrical Resistivity (in x 10-6)	Modulus of Elasticity (psi x 106	Coefficient of Thermal Expansion (in/in)/ °F x 10-6	Specific Heat (BTU/lb/ °F)	Melting Range (°F)
at 68°F: 0.276	14.4 at 212°F	56 at 68°F	29	5.90 at 68 – 392°F	0.11 at 68°F to 212°F	2700 to 2790
				6.5 at 68 – 1112°F