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1.4835

Grade 1.4835 has significantly higher nickel and increased nitrogen content than other heat resistant austenitic stainless steels. This combined with micro alloyed rare earth metals gives good resistance to oxidation and relatively high creep strength values.
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Dimensions

Cold-rolled EN 1.4835 (253MA)

Dimensions (mm) Theor. weight        
Thickness Width Length kg/m2 kg/pc 0-49kg 50-199kg 200-499kg >500kg
2 1250 2500 16,00 50,00   147,00 91,90 73,50
3 1500 3000 24,00 108,00   143,00 89,40 71,50
4 1500 3000 32,00 144,00   143,00 89,40 71,50
5 1500 3000 40,00 180,00   143,00 89,40 71,50
6 1500 3000 48,00 216,00     89,40 71,50
8 1500 3000 64,00 288,00     89,40 71,50

 

General Properties

  • Informative maximum application temperature for dry air is 1100°C
  • Most suitable temperature service range is 850-1100°C
  • Temperatures between 600-850°C can lead to reduced impact toughness
  • May become slightly magnetic as a result of cold working or welding
  • Heat treatment guidance: solution annealing at 1020-1120°C with air or water cooling
  • Resistance to wet chloride induced corrosion is not good. SCC resistance is close to EN 1.4404
  • Suitable welding methods shielded maetal arc, gas tungsten arc, plasma arc, gas metal arc and submerged arc welding
  • Filler metal of type EN 1.4835 is recommended for both covered electrodes and welding wire
  • Material shall be cooled to below 150°C between passes
  • Material can be easily be formed in cold condition, yet due to its higher N contenct higher deformation forces are required
  • Due to the high proof strength and work hardening machining is more demanding than for standard stainless steels
Thermal conductivity at 20°C W/(mK): 15 Solidification range, °C: 1430-1350
Thermal conductivity at 500°C W/(mK): 21 Hot forming, °C: 1150-900
Specific heat capacity at 20°C kJ/(kgK): 0.50 Solution annealing, °C: 1020-1120
Electrical resistivity at 20°C (Ωmm2)/m: 0.85 Stress relief annealing 0.5h, °C: 900
Magnetizable: No    


Chemical properties (% by mass)


 C Si Mn P max S N Cr Cu 
 Mo Nb Ni Others
acc. to EN 10095 0.05-0.12 1.40-2.50 ≤ 1.00 0.045 ≤ 0.015 0.12-0.20 20.0-22.0 - - - 10.0-12.0 Ce 0.03-0.08


Mechanical properties


 Product Thickness
max/mm		 Rp0.2
Mpa		 Rp0.1
Mpa 		 Rm
Mpa		 A80
< 3mm Tr		 A
≥ 3mm Tr		 HB max Heat treatment
acc. to EN 10095 Flat prod. 75  310 350 650-850 37 40 210 Annealed

Elevated temperature strength properties (minimum values, MPa) according to MatWeb
  100°C 200°C 300°C 400°C 500°C 600°C 700°C
Rm 585 545 535 530 495 445 360
Rp0.2 230 185 170 160 150 140 130
Rp1.0 265 215 200 190 180 170 155


Creep properties

Estimated average value of the strength (N/mm2) for 1% elognation at elevated temperature. The load referred to the initial cross-section which causes a permanent strain of 1%.

According to EN 10095

Elognation 1% in 1 000 h (for guidance use only)
500°C 600°C 700°C 800°C 900°C 1000°C
- 170 66 31 15,5 (8)
Elognation 1% in 10 000 h (for guidance use only)
500°C 600°C 700°C 800°C 900°C 1000°C
- 126 45 19 10 (5)

Elognation 1% in 100 000 h (for guidance use only)
500°C 600°C 700°C 800°C 900°C 1000°C
- 80 26 11 6 (3)


Physical properties

According to EN 10095

Density Linear expansion coefficient (10-6K-1)
kg/dm3 20°C-200°C 200°C-400°C 400°C-600°C 600°C-800°C 800°C-1000°C
7.8 17.0 18.0 18.5 19.0 19.5