SA-803 25-4-4 - Cast Iron and Cast Steel

SA-803 25-4-4 Stainless Steels to SA-803/SA-803M

SA-803 25-4-4 - Specification & Application

SA-803/SA-803M - Specification for Welded Ferritic Stainless Steel Feedwater Heater Tubes

Specification for Welded Ferritic Stainless Steel Feedwater Heater Tubes

Chemical composition(wt.%) of SA-803 25-4-4 grade: to SA-803/SA-803M

Elements	Min.（≥）	Max.（≤）
C	-	0.025
Si	-	0.75
Mn	-	1.00
P	-	0.04
S	-	0.04
Ni	3.35	4.50
Cr	24.50	26.00
Al	-	-
Cu	-	0.50
Ti	-	-
Fe	-	-
N	-	0.035
Mo	3.50	4.50

SA-803 25-4-4 - Detail

Specification for Welded Ferritic Stainless Steel Feedwater Heater Tubes

Mechanical properties of grade SA-803 25-4-4 SA-803/SA-803M

Proof strength R_p0.2 (MPa)	Tensile strength R_m (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
531 (≥)	626 (≥)	13	24	31	Solution and Aging, Annealing, Ausaging, Q+T,etc	331

Physical properties of grade SA-803 25-4-4 SA-803/SA-803M

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
819 (≥)	424 (≥)	32	13	34	Solution and Aging, Annealing, Ausaging, Q+T,etc	144
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
686	485	518

Equivalent Grade

1 A 176 S44635 2 A 240 S44635 3 A 268 S44635 4 S44635 5 SA-240 S44635 6 SA-268 S44635 7 A 268 25-4-4 8 A 791 Grade 25-4-4 9 A 803 Grade 25-4-4 10 A 959 Type 25-4-4

Equivalent Products

Product shapes we supply:

We can customize the production of SA-803 25-4-4 grade, contact us for the best solution.
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