RED+ | Paralloy Group | Paralloy Group

25/35/0.1 Cr/Ni/Nb 0.5%C + 0.1% N

Cast Heat Resisting Alloy

Application

25/35 Enhanced Creep Properties

RED+ is a variation of H39WM+ specially developed for the DRI application related to Midrex type reformer design. RED+ tailored chemistry allows exposure to temperature up to 1135ºC, but most specifically involves good creep properties with very low creep rate for long time exposure at temperature up to 1050 ºC. In addition, RED+ characteristics are: Good aged ductility and hot temperature ductility which can accommodate furnace temperature variations.

RED+ has been specifically developed for the direct reduction market for installation in to new and existing plants. RED+ has multiple abilities as a high temperature alloy. RED+ has a high creep resistance, low creep rate and good aged ductility to enhance tube life. Specific emphasis is to control and minimise tube elongation to improve overall service life. These same features, allows the alloy to resist crack formation resulting from any plant upsets, or during unpredicted events.

Nominal Composition

6
C Carbon

0.5
14
Si Silicon

1
25
Mn Maganese

1
24
Cr Chromium

25
28
Ni Nickel

35
43
Nb Niobium

0.1
Plus
Additions

Physical Properties

Coefficient of Thermal Expansion (mm/mm°C)	Thermal Conductivity (W/m°K)	Density (kg/m³)
20 – 100°C – 14.4 x 10⁻⁶	100°C – 13.0	7.97 x 10³
20 – 800°C – 16.8 x 10⁻⁶	800°C – 24.3
20 – 1000°C – 17.6 x 10⁻⁶	1000°C – 27.7
20 – 1100°C – 18.1 x 10⁻⁶	1100°C – 29.7

Mechanical Properties

Download specifications

UTS (N/mm²) 460
Proof Stress 0.2% (N/mm²) 225
Elongation (%) 10 (tube) 8 (flange)

Temp (°C)	10,000 Hour Life	50,000 Hour Life	100,000 Hour Life
	Minimum	Minimum	Minimum
900	41.36	33.50	30.59
925	35.20	28.39	25.88
950	29.97	24.07	21.90
975	25.52	20.41	18.54
1000	21.73	17.31	15.69
1025	18.51	14.68	13.29
1050	15.77	12.45	11.25

Download specifications

UTS (N/mm²)	460
Proof Stress 0.2% (N/mm²)	225
Elongation (%)	10 (tube) 8 (flange)

Temperature (°C)	UTS (N/mm²)	0.2% (N/mm²)	Elongation (%)
900°C	160	107	28.5
1000°C	98	72	32.5
1100°C	74	59	21

Temp (°C)	10,000 Hour Life	50,000 Hour Life	100,000 Hour Life
	Minimum	Minimum	Minimum
900	41.36	33.50	30.59
925	35.20	28.39	25.88
950	29.97	24.07	21.90
975	25.52	20.41	18.54
1000	21.73	17.31	15.69
1025	18.51	14.68	13.29
1050	15.77	12.45	11.25