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AISI S44020 Details

S44020 Application:Martensitic Chromium Free Machining Stainless Steel

Category Type Grade Microstructure Designations
Grades Stainless Steels S44020 Martensite USA - AISI ,

Chemical composition(wt.%) of S44020 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.95 1.20
Mn - 1.25
Si - 1.00
P - 0.04
S 0.10 0.35
Cr 16.00 18.00
Ni - 0.75
Mo - -
N - 0.08
Martensitic Chromium Free Machining Stainless Steel

Mechanical properties of grade S44020

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
926 (≥) 183 (≥) 33 24 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical properties of grade S44020

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
733 (≥) 225 (≥) 11 41 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 333
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
269 173 928

S44020 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
A 582 S44020 SAE USA
Standard Specification for Free-Machining Stainless Steel Bars
S44020 AISI USA
Martensitic Chromium Free Machining Stainless Steel
A 582 S44023 SAE USA
Standard Specification for Free-Machining Stainless Steel Bars
S44023 AISI USA
Martensitic Chromium Selenium Bearing Free Machining Stainless Steel
A 582 S44020 SAE USA
Standard Specification for Free-Machining Stainless Steel Bars
S44020 AISI USA
Martensitic Chromium Free Machining Stainless Steel
S44020 UNS USA
S44020

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