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KS STR4

STR4


STR4 material is KS D 3731 (2002) Heat - resisting steel bars Heat - resisting steel bars.

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


STR4 property sheet

STR4 Spec.

KS D 3731 (2002)
Heat - resisting steel bars

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: 19.00 20.50
Ni: 1.15 1.65
Mo: Max Min
N: Max Min
Cu: Max 0.30

Mechanical Properties of STR4

Rp0.2 (MPa) 718 (≥)
Rm (MPa) 484 (≥)
AKV (J) 32
A (%) 43
Z (%) 44
Hardness HBW 423

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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