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UNS S44020

Description

USA UNS UNS S44020 Martensitic special steel and UNS S44020 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: UNS S44020
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel UNS S44020 UNS USA Martensitic special steel
ASTM 431
UNS S43100
AISI 440A
ASTM 440A
UNS S44002
AISI 440B
ASTM 440B
UNS S44003
ASTM 440C
UNS S44004

Chemical composition(mass fraction)(wt.%) of the UNS S44020

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) N(%)
0.95-1.20 Max 1.00 Max 1.25 Max 0.04 Max 0.10-0.35 16.0-18.0 Max 0.75 0.40-0.60 Max 0.08

Mechanical Properties of steel grade UNS S44020

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
635 (≥) 869 (≥) 44 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade UNS S44020

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
44 - -     0.13 -  
648 155 - 21.3 312   -  
663 - 42 44.2   222 441

Heat Treatment of steel grade UNS S44020

Heat treated : 1924°C - 1827°C

Technological Curves of steel grade UNS S44020

Cross Reference Table (Equivalent Grade) of UNS S44020

Grade Standard Country Application
UNS G10300 UNS USA General use carbon steel bar
UNS G10050 UNS USA General use carbon steel bar
UNS G10060 UNS USA General use carbon steel bar
UNS G10080 UNS USA General use carbon steel bar
UNS G10110 UNS USA General use carbon steel bar
ASTM 1012 ASTM USA General use carbon steel bar
UNS G10120 UNS USA General use carbon steel bar
UNS G10130 UNS USA General use carbon steel bar
UNS G10150 UNS USA General use carbon steel bar
UNS G10160 UNS USA General use carbon steel bar
UNS G10170 UNS USA General use carbon steel bar
UNS G10180 UNS USA General use carbon steel bar
UNS G10190 UNS USA General use carbon steel bar
UNS G10200 UNS USA General use carbon steel bar
UNS G10210 UNS USA General use carbon steel bar
UNS T72301 UNS USA Carbon tool steel
W2-A ASTM USA Carbon tool steel
UNS T72302 UNS USA Carbon tool steel
UNS S42800 UNS USA Martensitic special steel
UNS S43100 UNS USA Martensitic special steel

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