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SUS 321 HTF


SUS 321 HTF material is JIS G 3467 (2011) Steel tubes for fired heater Steel tubes for fired heater.

Chemical composition of SUS 321 HTF, SUS 321 HTF mechanical properties, SUS 321 HTF datasheet, SUS 321 HTF equivalent grade, Heat treatment and temperature process of SUS 321 HTF.


SUS 321 HTF property sheet

SUS 321 HTF Spec.

JIS G 3467 (2011)
Steel tubes for fired heater

Chemical Composition of SUS 321 HTF

C: Max 0.08
Si: Max 1.00
Mn: Max 2.00
P: Max 0.045
S: Max 0.03
Cr: 17.00 19.00
Ni: 9.00 13.00
Mo: Max Min
N: Max Min
Ti: 5×C% Min

Mechanical Properties of SUS 321 HTF

Rp0.2 (MPa) 666 (≥)
Rm (MPa) 659 (≥)
AKV (J) 34
A (%) 32
Z (%) 21
Hardness HBW 322

SUS 321 HTF shape and dimensions

SUS 321 HTF Round bar: 1mm-800mm
SUS 321 HTF Square bar: 10mm * 10mm-600mm *600mm
SUS 321 HTF Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
SUS 321 HTF Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
SUS 321 HTF Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
SUS 321 HTF Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes