CR32W | Paralloy Group | Paralloy Group

20/32 Cr/Ni Nb 0.1% C

Cast Heat Resisting Alloy
Steam Reforming / Steam Cracking

Application

For High-Stress Applications Up To 1000 °C

CR32W was developed primarily for applications up
to 1000oC that are subjected to high stresses, thermal fatigue or
even thermal shock.

For many years, CR32W has been widely used for outlet headers
or manifolds in reformer furnaces, and for collectors and
transfer lines in pyrolysis plants such as ethylene furnaces. The
low carbon content helps maintain tensile ductility after service
ageing, and careful composition control provides the high creep
ductility to assist relaxation of weld-zone residual stresses in
thick sections.

CR32W is also recommended for heat treatment furnace
fixtures or any equipment that is subjected to rapid thermal
cycling.

Nominal Composition

6
C Carbon

0.1
14
Si Silicon

0.8
25
Mn Maganese

1
24
Cr Chromium

20
28
Ni Nickel

32
43
Nb Niobium

1.0
Plus
Additions

Physical Properties

Coefficient of Thermal Expansion (mm/mm°C)	Thermal Conductivity (W/m°K)	Density (kg/m³)	Young Modulus (N/mm² x 10³)	Specific Heat (J/KgK)
20 – 100°C – 14.5 x 10⁻⁶	100°C – 13.4	7.94 x 103	20°C - 155	502
20 – 750°C – 17.5 x 10⁻⁶	750°C – 25.9		800°C - 155
20 – 1000°C – 18.5 x 10⁻⁶	1000°C – 30.5		1000°C - 155

Coefficient of Thermal Expansion (mm/mm°C)

Thermal Conductivity (W/m°K)

Density (kg/m³)

Young Modulus

(N/mm² x 10³)

Specific Heat (J/KgK)

20 – 100°C – 14.5 x 10⁻⁶

100°C – 13.4

7.94 x 103

20°C - 155

502

20 – 750°C – 17.5 x 10⁻⁶

750°C – 25.9

800°C - 155

20 – 1000°C – 18.5 x 10⁻⁶

1000°C – 30.5

1000°C - 155

Mechanical Properties

Download specifications

UTS (N/mm²) 448
Proof Stress 0.2% (N/mm²) 175
Elongation (%) 25
Temperature (°C) UTS (N/mm²) 0.2% (N/mm²) Elongation (%)
700°C 296 125 39
800°C 196 106 49
900°C 102 76 67
1000°C 68 56 75

Temp (°C)	10,000 Hour Life		50,000 Hour Life		100,000 Hour Life
	Minimum	Mean	Minimum	Mean	Minimum	Mean
750	54.12	64.02	44.75	52.94	41.26	48.45
775	46.38	54.87	38.23	45.23	35.20	41.64
800	39.79	47.08	32.70	38.68	30.07	35.57
825	34.18	40.44	28.00	33.13	25.71	30.42
850	29.40	34.77	24.01	28.40	22.02	26.05
875	25.31	29.94	20.61	24.38	18.88	22.33
900	21.81	25.80	17.71	20.95	16.21	19.17
925	18.82	22.27	15.24	18.03	13.39	16.48
950	16.26	19.23	13.13	15.53	11.99	14.18
975	14.06	16.63	11.33	13.40	10.33	12.22
1000	12.17	14.40	9.78	11.57	8.91	10.54

Download specifications

UTS (N/mm²)	448
Proof Stress 0.2% (N/mm²)	175
Elongation (%)	25

Temperature (°C)	UTS (N/mm²)	0.2% (N/mm²)	Elongation (%)
700°C	296	125	39
800°C	196	106	49
900°C	102	76	67
1000°C	68	56	75

Temp (°C)	10,000 Hour Life		50,000 Hour Life		100,000 Hour Life
	Minimum	Mean	Minimum	Mean	Minimum	Mean
750	54.12	64.02	44.75	52.94	41.26	48.45
775	46.38	54.87	38.23	45.23	35.20	41.64
800	39.79	47.08	32.70	38.68	30.07	35.57
825	34.18	40.44	28.00	33.13	25.71	30.42
850	29.40	34.77	24.01	28.40	22.02	26.05
875	25.31	29.94	20.61	24.38	18.88	22.33
900	21.81	25.80	17.71	20.95	16.21	19.17
925	18.82	22.27	15.24	18.03	13.39	16.48
950	16.26	19.23	13.13	15.53	11.99	14.18
975	14.06	16.63	11.33	13.40	10.33	12.22
1000	12.17	14.40	9.78	11.57	8.91	10.54