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UNS G98400

Data Table for: Steel Grades : Alloy Steel : UNS G98400

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

  • Quantity
  • Value
  • Unit
  • Young's modulus
  • Tensile strength
  • Elongation
  • Fatigue
  • Yield strength
  • 200000 - 200000
  • 650 - 880
  • 8 - 25
  • 275 - 275
  • 350 - 550
  • MPa
  • MPa
  • %
  • MPa
  • MPa

Physical Properties

  • Quantity
  • Value
  • Unit
  • Thermal expansion
  • Thermal conductivity
  • Specific heat
  • Melting temperature
  • Density
  • Resistivity
  • 10 - 10
  • 25 - 25
  • 460 - 460
  • 1450 - 1510
  • 7700 - 7700
  • 0.55 - 0.55
  • e-6/K
  • W/m.K
  • J/kg.K
  • °C
  • kg/m3
  • Ohm.mm2/m

Heat Treatment:

Annealing

Quenching

Tempering

Normalizing

Q & T

Can produce UNS G98400 specifications and size

  • Steel grade
  • Specification
  • Processing range(mm)
  • UNS G98400
  • UNS G98400
  • UNS G98400
  • UNS G98400
  • UNS G98400
  • UNS G98400
  • Φ1 to Φ2000
  • 10 to 1000
  • 0.08 to 800(T)*10 to 1500(W)*Long
  • Pipe/tube/slugs/donuts/cubes/other shapes
  • OD: Φ4-410; WT: 1-35 mm
  • THK:0.1mm Width:1500mm

Description

AISI 9840 steel, 540°C (1000°F) temper, 25 mm (1 in.) round
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 9000 Series steel; Low Alloy Steel; Carbon Steel; Medium Carbon steel

Material Notes: Quenched, 540°C temper, 525°C nitride for 40 hours with 20-30% ammonia dissociation, hardness of 88 HR15N case hardness at 0.635-0.762 mm nitrided case depth

Key Words: UNS G98400, AMS 6342 C, ASTM A274, ASTM A322, ASTM A519, SAE J778, DIN 1.6511, UNI 38 NiCrMo 4, B.S. 816 M 40


Physical Properties Metric English Comments
Density 7.87 g/cc 0.284 lb/in³ field average for steels

Mechanical Properties Metric English Comments
Hardness, Brinell 361 361
Hardness, Knoop 390 390 Converted from Brinell hardness.
Hardness, Rockwell B 100 100 Converted from Brinell hardness.
Hardness, Rockwell C 35 35 core hardness. Quenched, 540°C temper, 525°C nitride for 40 hours with 20-30% ammonia dissociation
Hardness, Vickers 382 382 Converted from Brinell hardness.
Tensile Strength, Ultimate 1240 MPa 180000 psi
Tensile Strength, Yield 1105 MPa 160300 psi
Elongation at Break 15.0 % 15.0 % in 50 mm
Modulus of Elasticity 200 GPa 29000 ksi Estimated
Bulk Modulus 140 GPa 20300 ksi Typical for steel.
Poissons Ratio 0.290 0.290 Calculated
Machinability 70 % 70 % Estimated
Shear Modulus 80.0 GPa 11600 ksi Typical for steel

Electrical Properties Metric English Comments
Electrical Resistivity 0.0000174 ohm-cm 0.0000174 ohm-cm Estimated

Thermal Properties Metric English Comments
CTE, linear 11.5 µm/m-°C
@Temperature 20.0 °C 6.39 µin/in-°F
@Temperature 68.0 °F
12.2 µm/m-°C
@Temperature 250 °C 6.78 µin/in-°F
@Temperature 482 °F Estimated
13.9 µm/m-°C
@Temperature 500 °C 7.72 µin/in-°F
@Temperature 932 °F
14.7 µm/m-°C
@Temperature 1000 °C 8.17 µin/in-°F
@Temperature 1830 °F
Specific Heat Capacity 0.472 J/g-°C 0.113 BTU/lb-°F Estimated
Thermal Conductivity 51.9 W/m-K 360 BTU-in/hr-ft²-°F Typical steel

Component Elements Properties Metric English Comments
Carbon, C 0.380 - 0.430 % 0.380 - 0.430 %
Chromium, Cr 0.700 - 0.900 % 0.700 - 0.900 %
Iron, Fe 95.945 - 97.02 % 95.945 - 97.02 % As remainder
Manganese, Mn 0.700 - 0.900 % 0.700 - 0.900 %
Molybdenum, Mo 0.200 - 0.300 % 0.200 - 0.300 %
Nickel, Ni 0.850 - 1.15 % 0.850 - 1.15 %
Phosphorous, P <= 0.0350 % <= 0.0350 %
Silicon, Si 0.150 - 0.300 % 0.150 - 0.300 %
Sulfur, S <= 0.0400 % <= 0.0400 %


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M984AA / 8711

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