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KS STR31

STR31


STR31 material is KS D 3731 (2002) Heat - resisting steel bars Heat - resisting steel bars.

Chemical composition of STR31, STR31 mechanical properties, STR31 datasheet, STR31 equivalent grade, Heat treatment and temperature process of STR31.


STR31 property sheet

STR31 Spec.

KS D 3731 (2002)
Heat - resisting steel bars

Related Materials

STR31
STR310

Chemical Composition of STR31

C: 0.35 0.45
Si: 1.50 2.50
Mn: Max 0.60
P: Max 0.040
S: Max 0.030
Cr: 14.00 16.00
Ni: 13.00 15.00
Mo: Max Min
N: Max Min
W: 2.00 3.00

Mechanical Properties of STR31

Rp0.2 (MPa) 674 (≥)
Rm (MPa) 642 (≥)
AKV (J) 21
A (%) 21
Z (%) 14
Hardness HBW 234

STR31 shape and dimensions

STR31 Round bar: 1mm-800mm
STR31 Square bar: 10mm * 10mm-600mm *600mm
STR31 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
STR31 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
STR31 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
STR31 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

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