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KS STR4

STR4


STR4 material is KS standard martensite heat resistant steel.

Chemical composition of STR4, STR4 mechanical properties, STR4 datasheet, STR4 equivalent grade, Heat treatment and temperature process of STR4.


STR4 property sheet

STR4 Spec.

Related Materials

STR446
STR4
STR409
STR409L

Chemical Composition of STR4

C 0.75-0.85
Si 1.75-2.25
Mn 0.20-0.60
P Max 0.03
S Max 0.03
Cr 19.0-20.5
Ni 1.15-1.65

Mechanical Properties of STR4

Rp0.2 (MPa) 854 (≥)
Rm (MPa) 548 (≥)
AKV (J) 41
A (%) 21
Z (%) 42
Hardness HBW 121

STR4 shape and dimensions

STR4 Round bar: 1mm-800mm
STR4 Square bar: 10mm * 10mm-600mm *600mm
STR4 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
STR4 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
STR4 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
STR4 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

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