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JIS SUS 631 Details

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SUS 631 Application:Stainless steel bars

Category Type Grade Microstructure Designations
Grades Stainless Steels SUS 631 Precipitation-Hardening Japan - JIS , G 4303 (2012) - Stainless steel bars

Chemical composition(wt.%) of SUS 631 grade: G 4303 (2012)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.09
Si - 1.00
Mn - 1.00
P - 0.04
S - 0.03
Cr 16.00 18.00
Ni 6.50 7.75
Mo - -
N - -
Al 0.75 1.50
Stainless steel bars

Mechanical properties of grade SUS 631 G 4303 (2012)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
314 (≥) 665 (≥) 34 23 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical properties of grade SUS 631 G 4303 (2012)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
971 (≥) 464 (≥) 14 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 312
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
939 459 219

SUS 631 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
SUS 631 JIS Japan
Stainless steel bars
SUS 631 JIS Japan
Hot-rolled stainless steel plates, sheet and strip
SUS 631 JIS Japan
Cold-rolled stainless steel plate, sheet and strip
SUS 631 JIS Japan
Heat-resisting steel bars and wire rods
SUS 631 JIS Japan
Heat-resisting steel plate, sheet and strip
SUS 631 J1 JIS Japan
Stainless steel wire rods
SUS 631 J1 JIS Japan
Stainless steel wires for springs
SUS 631-CSP JIS Japan
Cold rolled stainless steel strip for springs
SUS 631J1-WPC JIS Japan
Stainless steel wires for springs

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