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420 Stainless Steel
Categories: Metal; Ferrous Metal; Heat Resisting; Stainless Steel; T 400 Series Stainless Steel
Material Notes: 16.0 mm diameter bar, austenitized at 980°C for 30 minutes, oil quench, temper for 2 hours at 28°C above test temperature
Key Words: UNS S42000, AMS 5506, AMS 5621, ASTM A276, ASTM A314, ASTM A473, ASTM A580, FED QQ-S-763, FED QQ-S-766, FED QQ-W-423, MIL SPEC MIL-S-862, SAE J405 (51420), B.S. 420 S 37, B.S. CDS-18 (U.K), martensitic, DIN 1.4021, AFNOR Z 20 C 13 (Fr), UNI X 20 Cr 13, JIS SUS 420 J1, SS14 2303 (Sweden), ISO 683/13 4
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Physical PropertiesMetricEnglishComments
Density 7.80 g/cc0.282 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 594594Converted from Rockwell C Hardness
 253
@Temperature 705 °C		253
@Temperature 1300 °F		Converted from Rockwell C Hardness
 269
@Temperature 650 °C		269
@Temperature 1200 °F		Converted from Rockwell C Hardness
 297
@Temperature 595 °C		297
@Temperature 1100 °F		Converted from Rockwell C Hardness
 334
@Temperature 540 °C		334
@Temperature 1000 °F		Converted from Rockwell C Hardness
 492
@Temperature 315 °C		492
@Temperature 599 °F		Converted from Rockwell C Hardness
 506
@Temperature 425 °C		506
@Temperature 797 °F		Converted from Rockwell C Hardness
 506
@Temperature 205 °C		506
@Temperature 401 °F		Converted from Rockwell C Hardness
 521
@Temperature 480 °C		521
@Temperature 896 °F		Converted from Rockwell C Hardness
Hardness, Knoop 662662Converted from Rockwell C Hardness
 268
@Temperature 705 °C		268
@Temperature 1300 °F		Converted from Rockwell C Hardness
 286
@Temperature 650 °C		286
@Temperature 1200 °F		Converted from Rockwell C Hardness
 318
@Temperature 595 °C		318
@Temperature 1100 °F		Converted from Rockwell C Hardness
 362
@Temperature 540 °C		362
@Temperature 1000 °F		Converted from Rockwell C Hardness
 545
@Temperature 315 °C		545
@Temperature 599 °F		Converted from Rockwell C Hardness
 562
@Temperature 425 °C		562
@Temperature 797 °F		Converted from Rockwell C Hardness
 562
@Temperature 205 °C		562
@Temperature 401 °F		Converted from Rockwell C Hardness
 579
@Temperature 480 °C		579
@Temperature 896 °F		Converted from Rockwell C Hardness
Hardness, Rockwell C 5757before testing. 27-57 depending on temper.
 21
@Temperature 705 °C		21
@Temperature 1300 °F		after testing
 23.5
@Temperature 705 °C		23.5
@Temperature 1300 °F		before testing
 26
@Temperature 650 °C		26
@Temperature 1200 °F		after testing
 26.5
@Temperature 650 °C		26.5
@Temperature 1200 °F		before testing
 30.5
@Temperature 595 °C		30.5
@Temperature 1100 °F		after testing
 31
@Temperature 595 °C		31
@Temperature 1100 °F		before testing
 35.5
@Temperature 540 °C		35.5
@Temperature 1000 °F		after testing
 36
@Temperature 540 °C		36
@Temperature 1000 °F		before testing
 49
@Temperature 315 °C		49
@Temperature 599 °F		after testing
 50
@Temperature 480 °C		50
@Temperature 896 °F		after testing
 50.5
@Temperature 315 °C		50.5
@Temperature 599 °F		before testing
 51
@Temperature 205 °C		51
@Temperature 401 °F		after testing
 51.5
@Temperature 425 °C		51.5
@Temperature 797 °F		before testing
 51.5
@Temperature 205 °C		51.5
@Temperature 401 °F		before testing
 52
@Temperature 425 °C		52
@Temperature 797 °F		after testing
 52.5
@Temperature 480 °C		52.5
@Temperature 896 °F		before testing
Hardness, Vickers 641641Converted from Rockwell C Hardness
 260
@Temperature 705 °C		260
@Temperature 1300 °F		Converted from Rockwell C Hardness
 278
@Temperature 650 °C		278
@Temperature 1200 °F		Converted from Rockwell C Hardness
 308
@Temperature 595 °C		308
@Temperature 1100 °F		Converted from Rockwell C Hardness
 349
@Temperature 540 °C		349
@Temperature 1000 °F		Converted from Rockwell C Hardness
 525
@Temperature 315 °C		525
@Temperature 599 °F		Converted from Rockwell C Hardness
 541
@Temperature 425 °C		541
@Temperature 797 °F		Converted from Rockwell C Hardness
 541
@Temperature 205 °C		541
@Temperature 401 °F		Converted from Rockwell C Hardness
 558
@Temperature 480 °C		558
@Temperature 896 °F		Converted from Rockwell C Hardness
Tensile Strength, Ultimate 2025 MPa293700 psi
 170 MPa
@Temperature 705 °C		24700 psi
@Temperature 1300 °F
 290 MPa
@Temperature 650 °C		42100 psi
@Temperature 1200 °F
 450 MPa
@Temperature 595 °C		65300 psi
@Temperature 1100 °F
 660 MPa
@Temperature 540 °C		95700 psi
@Temperature 1000 °F
 1415 MPa
@Temperature 480 °C		205200 psi
@Temperature 896 °F
 1705 MPa
@Temperature 315 °C		247300 psi
@Temperature 599 °F
 1715 MPa
@Temperature 425 °C		248700 psi
@Temperature 797 °F
 1820 MPa
@Temperature 205 °C		264000 psi
@Temperature 401 °F
Tensile Strength, Yield 1360 MPa
@Strain 0.2 %		197000 psi
@Strain 0.2 %
 115 MPa
@Strain 0.2 %,
Temperature 705 °C		16700 psi
@Strain 0.2 %,
Temperature 1300 °F
 240 MPa
@Strain 0.2 %,
Temperature 650 °C		34800 psi
@Strain 0.2 %,
Temperature 1200 °F
 380 MPa
@Strain 0.2 %,
Temperature 595 °C		55100 psi
@Strain 0.2 %,
Temperature 1100 °F
 585 MPa
@Strain 0.2 %,
Temperature 540 °C		84800 psi
@Strain 0.2 %,
Temperature 1000 °F
 1040 MPa
@Strain 0.2 %,
Temperature 315 °C		151000 psi
@Strain 0.2 %,
Temperature 599 °F
 1085 MPa
@Strain 0.2 %,
Temperature 205 °C		157400 psi
@Strain 0.2 %,
Temperature 401 °F
 1095 MPa
@Strain 0.2 %,
Temperature 480 °C		158800 psi
@Strain 0.2 %,
Temperature 896 °F
 1155 MPa
@Strain 0.2 %,
Temperature 425 °C		167500 psi
@Strain 0.2 %,
Temperature 797 °F
Elongation at Break 2.5 %2.5 %in 50 mm
 9.0 %
@Temperature 480 °C		9.0 %
@Temperature 896 °F		in 50 mm
 11.5 %
@Temperature 205 °C		11.5 %
@Temperature 401 °F		in 50 mm
 12.5 %
@Temperature 425 °C		12.5 %
@Temperature 797 °F		in 50 mm
 13.5 %
@Temperature 315 °C		13.5 %
@Temperature 599 °F		in 50 mm
 20.5 %
@Temperature 540 °C		20.5 %
@Temperature 1000 °F		in 50 mm
 26 %
@Temperature 595 °C		26 %
@Temperature 1100 °F		in 50 mm
 31.5 %
@Temperature 650 °C		31.5 %
@Temperature 1200 °F		in 50 mm
 36 %
@Temperature 705 °C		36 %
@Temperature 1300 °F		in 50 mm
Modulus of Elasticity 200 GPa29000 ksi
Poissons Ratio 0.240.24Calculated
Shear Modulus 80.7 GPa11700 ksi
Charpy Impact  14.0 J
@Temperature 23.0 °C		10.3 ft-lb
@Temperature 73.4 °F
 100 J
@Temperature 23.0 °C		73.8 ft-lb
@Temperature 73.4 °F
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000550 ohm-cm
@Temperature 20.0 °C		0.0000550 ohm-cm
@Temperature 68.0 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  10.3 µm/m-°C
@Temperature 0.000 - 100 °C		5.72 µin/in-°F
@Temperature 32.0 - 212 °F
 10.8 µm/m-°C
@Temperature 0.000 - 315 °C		6.00 µin/in-°F
@Temperature 32.0 - 599 °F
 11.7 µm/m-°C
@Temperature 0.000 - 540 °C		6.50 µin/in-°F
@Temperature 32.0 - 1000 °F
 12.2 µm/m-°C
@Temperature 0.000 - 650 °C		6.78 µin/in-°F
@Temperature 32.0 - 1200 °F
Specific Heat Capacity 0.460 J/g-°C
@Temperature 0.000 - 100 °C		0.110 BTU/lb-°F
@Temperature 32.0 - 212 °F
Thermal Conductivity 24.9 W/m-K
@Temperature 100 °C		173 BTU-in/hr-ft²-°F
@Temperature 212 °F
Melting Point 1455 - 1510 °C2651 - 2750 °F
Solidus 1455 °C2651 °F
Liquidus 1510 °C2750 °F
Maximum Service Temperature, Air 620 °C1150 °FContinuous Service
 735 °C1360 °FIntermittent
 
Component Elements PropertiesMetricEnglishComments
Carbon, C >= 0.15 %>= 0.15 %
Chromium, Cr 13 %13 %
Iron, Fe 85 %85 %
Manganese, Mn <= 1.0 %<= 1.0 %
Phosphorus, P <= 0.040 %<= 0.040 %
Silicon, Si <= 1.0 %<= 1.0 %
Sulfur, S <= 0.030 %<= 0.030 %

References for this datasheet.

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