Grades | Stainless Steels | A 646 Grade Nit. 135

SAE A 646 Grade Nit. 135 ( Precipitation-Hardening )

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A 646 Grade Nit. 135 Application:Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Chemical composition(mass fraction)(wt.%) of the A 646 Grade Nit. 135
Elements Min.(≥) Max.(≤) Similar Remarks
C 0.38 0.43
Si 0.20 0.40
Mn 0.50 0.70
Cr - -
Ni 0.30 0.40
Mo - -
Co - -
W 0.95 1.30
Al - -
Cu - -
Ti - -
Fe - -

Mechanical properties of grade A 646 Grade Nit. 135

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition HBW
368 (≥) 814 (≥) 41 32 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical properties of grade A 646 Grade Nit. 135

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
788 (≥) 694 (≥) 31 11 34 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
- - -
871 437 389 - - -

A 646 Grade Nit. 135 Range of products
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