Generated reference · P × T grid

Superheated Steam Table

Thermodynamic and transport properties of superheated water vapor from 0.1 to 200 bar absolute and 100 to 800 °C.

Superheated steam is vapor above the saturation temperature at its pressure. This page groups valid vapor states by absolute pressure and lists specific volume, enthalpy, entropy, isobaric heat capacity, dynamic viscosity, and thermal conductivity. Grid points that would fall in the compressed-liquid or two-phase region are omitted rather than mislabeled as steam.

Click a temperature in any section to open that exact pressure–temperature pair in the calculator. The interactive result adds density, internal energy, speed of sound, response coefficients, dielectric constant, ionization constant where valid, unit presets, provenance, and export controls. Table values use six significant figures for scanning; JSON export is the route to full stored precision.

Sections share a compact set of temperatures, but only physically valid superheated points are emitted. The resulting gaps are deliberate: they prevent a rectangular display grid from implying that a compressed-liquid or wet-steam state is vapor. Pressure labels are absolute. For barg or psig setpoints, use the calculator's gauge units; it converts against the stated 101.325 kPa standard-atmosphere reference.

This is a compact industrial reference grid, not an interpolation service. If your state lies between rows, calculate it directly with the underlying formulation. For conditions on the boiling boundary use either saturation table. The methodology page documents the fixed engine version and official verification fixtures used to gate these generated numbers.

0.1 bar absolute (0.01 MPa)

Superheated vapor at 0.01 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
100	17.1967	2687.43	8.44877	1.90566	12.3268	0.0241958
150	19.5136	2783.02	8.68915	1.92014	14.2466	0.0285145
200	21.8260	2879.59	8.90484	1.94360	16.2363	0.0331748
250	24.1365	2977.45	9.10142	1.97109	18.2683	0.0381398
300	26.4460	3076.73	9.28266	2.00074	20.3238	0.0433767
350	28.7550	3177.54	9.45127	2.03183	22.3895	0.0488564
400	31.0636	3279.94	9.60931	2.06405	24.4555	0.0545539
450	33.3720	3383.96	9.75837	2.09723	26.5148	0.0604468
500	35.6802	3489.67	9.89970	2.13124	28.5620	0.0665154
600	40.2963	3706.27	10.1631	2.20101	32.6050	0.0791105
700	44.9121	3929.91	10.4055	2.27177	36.5640	0.0922182
800	49.5278	4160.62	10.6311	2.34240	40.4285	0.105740

0.2 bar absolute (0.02 MPa)

Superheated vapor at 0.02 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
100	8.58569	2686.19	8.12622	1.92193	12.3165	0.0242359
150	9.74880	2782.32	8.36797	1.92709	14.2406	0.0285506
200	10.9074	2879.14	8.58421	1.94706	16.2327	0.0332036
250	12.0641	2977.12	8.78106	1.97305	18.2661	0.0381619
300	13.2198	3076.49	8.96244	2.00199	20.3226	0.0433936
350	14.3750	3177.35	9.13114	2.03269	22.3888	0.0488696
400	15.5298	3279.78	9.28923	2.06467	24.4553	0.0545645
450	16.6843	3383.84	9.43833	2.09771	26.5148	0.0604557
500	17.8387	3489.57	9.57969	2.13161	28.5622	0.0665232
600	20.1472	3706.19	9.84310	2.20124	32.6054	0.0791174
700	22.4554	3929.85	10.0855	2.27193	36.5645	0.0922253
800	24.7634	4160.57	10.3112	2.34250	40.4289	0.105748

0.5 bar absolute (0.05 MPa)

Superheated vapor at 0.05 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
100	3.41878	2682.40	7.69520	1.97325	12.2856	0.0243575
150	3.88985	2780.20	7.94120	1.94843	14.2226	0.0286595
200	4.35627	2877.77	8.15914	1.95760	16.2219	0.0332902
250	4.82069	2976.16	8.35679	1.97900	18.2598	0.0382284
300	5.28411	3075.76	8.53860	2.00574	20.3189	0.0434445
350	5.74698	3176.78	8.70757	2.03526	22.3869	0.0489092
400	6.20949	3279.32	8.86583	2.06654	24.4545	0.0545963
450	6.67176	3383.45	9.01504	2.09912	26.5149	0.0604824
500	7.13387	3489.24	9.15649	2.13271	28.5627	0.0665467
600	8.05776	3705.96	9.42000	2.20195	32.6065	0.0791384
700	8.98138	3929.67	9.66251	2.27240	36.5657	0.0922467
800	9.90483	4160.44	9.88817	2.34283	40.4303	0.105771

1 bar absolute (0.1 MPa)

Superheated vapor at 0.1 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
100	1.69596	2675.77	7.36100	2.07411	12.2336	0.0245643
150	1.93673	2776.59	7.61467	1.98566	14.1924	0.0288430
200	2.17249	2875.48	7.83556	1.97569	16.2040	0.0334356
250	2.40619	2974.54	8.03458	1.98911	18.2491	0.0383397
300	2.63887	3074.54	8.21712	2.01206	20.3128	0.0435295
350	2.87097	3175.82	8.38652	2.03957	22.3838	0.0489753
400	3.10272	3278.54	8.54507	2.06966	24.4533	0.0546494
450	3.33424	3382.81	8.69448	2.10148	26.5149	0.0605269
500	3.56558	3488.71	8.83606	2.13455	28.5636	0.0665859
600	4.02795	3705.57	9.09976	2.20313	32.6083	0.0791734
700	4.49004	3929.38	9.34237	2.27319	36.5679	0.0922823
800	4.95196	4160.21	9.56810	2.34338	40.4325	0.105809

2 bar absolute (0.2 MPa)

Superheated vapor at 0.2 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
150	0.959894	2769.09	7.28091	2.06670	14.1318	0.0292183
200	1.08052	2870.78	7.50811	2.01388	16.1680	0.0337302
250	1.19891	2971.26	7.70999	2.01000	18.2278	0.0385643
300	1.31623	3072.08	7.89405	2.02496	20.3006	0.0437007
350	1.43296	3173.89	8.06434	2.04829	22.3775	0.0491082
400	1.54934	3276.98	8.22346	2.07596	24.4509	0.0547560
450	1.66547	3381.53	8.37326	2.10623	26.5150	0.0606162
500	1.78144	3487.64	8.51512	2.13823	28.5654	0.0666645
600	2.01304	3704.79	8.77918	2.20548	32.6119	0.0792436
700	2.24437	3928.80	9.02200	2.27477	36.5722	0.0923536
800	2.47553	4159.76	9.24786	2.34446	40.4370	0.105886

5 bar absolute (0.5 MPa)

Superheated vapor at 0.5 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
200	0.425034	2855.90	7.06107	2.14484	16.0595	0.0346483
250	0.474429	2961.13	7.27255	2.07831	18.1641	0.0392543
300	0.522603	3064.60	7.46145	2.06572	20.2645	0.0442226
350	0.570138	3168.06	7.63452	2.07527	22.3590	0.0495116
400	0.617294	3272.29	7.79540	2.09517	24.4439	0.0550787
450	0.664205	3377.67	7.94639	2.12061	26.5156	0.0608862
500	0.710947	3484.41	8.08911	2.14937	28.5710	0.0669020
600	0.804095	3702.46	8.35425	2.21258	32.6229	0.0794551
700	0.896964	3927.05	8.59771	2.27952	36.5853	0.0925683
800	0.989667	4158.40	8.82396	2.34774	40.4505	0.106117

10 bar absolute (1 MPa)

Superheated vapor at 1 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
200	0.206004	2828.27	6.69549	2.42885	15.8760	0.0363123
250	0.232739	2943.22	6.92662	2.21162	18.0583	0.0404640
300	0.257979	3051.70	7.12471	2.14083	20.2055	0.0451223
350	0.282492	3158.16	7.30281	2.12306	22.3294	0.0502006
400	0.306595	3264.39	7.46677	2.12840	24.4334	0.0556271
450	0.330440	3371.19	7.61981	2.14514	26.5176	0.0613435
500	0.354110	3479.00	7.76397	2.16820	28.5812	0.0673034
600	0.401111	3698.56	8.03095	2.22449	32.6419	0.0798113
700	0.447829	3924.12	8.27546	2.28746	36.6075	0.0929288
800	0.494380	4156.14	8.50236	2.35321	40.4732	0.106504

20 bar absolute (2 MPa)

Superheated vapor at 2 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
250	0.111484	2903.23	6.54742	2.56025	17.8477	0.0431577
300	0.125501	3024.25	6.76852	2.32010	20.0919	0.0470483
350	0.138594	3137.64	6.95824	2.23008	22.2752	0.0516465
400	0.151208	3248.23	7.12896	2.19968	24.4168	0.0567653
450	0.163537	3358.05	7.28634	2.19639	26.5254	0.0622864
500	0.175680	3468.09	7.43347	2.20694	28.6048	0.0681272
600	0.199614	3690.71	7.70420	2.24861	32.6821	0.0805376
700	0.223260	3918.24	7.95086	2.30346	36.6535	0.0936596
800	0.246737	4151.59	8.17907	2.36422	40.5199	0.107285

30 bar absolute (3 MPa)

Superheated vapor at 3 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
250	0.0706225	2856.55	6.28929	3.07724	17.6372	0.0463615
300	0.0811753	2994.35	6.54121	2.54308	19.9849	0.0491770
350	0.0905550	3116.06	6.74492	2.35393	22.2279	0.0531940
400	0.0993766	3231.57	6.92326	2.27804	24.4065	0.0579632
450	0.107884	3344.66	7.08532	2.25083	26.5385	0.0632694
500	0.116193	3457.04	7.23559	2.24723	28.6329	0.0689804
600	0.132445	3682.81	7.51017	2.27319	32.7254	0.0812828
700	0.148403	3912.34	7.75901	2.31963	36.7016	0.0944038
800	0.164189	4147.03	7.98853	2.37532	40.5680	0.108076

40 bar absolute (4 MPa)

Superheated vapor at 4 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
300	0.0588680	2961.65	6.36383	2.81995	19.8851	0.0515648
350	0.0664740	3093.32	6.58426	2.49669	22.1882	0.0548594
400	0.0734318	3214.37	6.77119	2.36422	24.4028	0.0592272
450	0.0800422	3330.99	6.93833	2.30878	26.5572	0.0642952
500	0.0864410	3445.84	7.09190	2.28920	28.6655	0.0698647
600	0.0988574	3674.85	7.37044	2.29824	32.7717	0.0820475
700	0.110973	3906.41	7.62149	2.33598	36.7518	0.0951616
800	0.122915	4142.46	7.85234	2.38652	40.6177	0.108878

50 bar absolute (5 MPa)

Superheated vapor at 5 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
300	0.0453466	2925.64	6.21094	3.17140	19.7938	0.0542973
350	0.0519714	3069.29	6.45153	2.66097	22.1570	0.0566637
400	0.0578398	3196.59	6.64813	2.45901	24.4062	0.0605647
450	0.0633245	3317.03	6.82075	2.37054	26.5816	0.0653672
500	0.0685829	3434.48	6.97780	2.33299	28.7028	0.0707815
600	0.0787027	3666.83	7.26044	2.32380	32.8212	0.0828321
700	0.0885146	3900.45	7.51373	2.35250	36.8042	0.0959331
800	0.0981510	4137.87	7.74592	2.39780	40.6688	0.109690

75 bar absolute (7.5 MPa)

Superheated vapor at 7.5 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
300	0.0267436	2814.28	5.86443	4.72948	19.6176	0.0638781
350	0.0324516	3002.69	6.18045	3.19417	22.1235	0.0619791
400	0.0369703	3149.30	6.40698	2.73925	24.4496	0.0642896
450	0.0409948	3280.75	6.59542	2.54356	26.6700	0.0682735
500	0.0447514	3405.33	6.76205	2.45120	28.8178	0.0732284
600	0.0518234	3646.53	7.05549	2.39007	32.9589	0.0848853
700	0.0585686	3885.44	7.31455	2.39465	36.9445	0.0979237
800	0.0651326	4126.34	7.55016	2.42639	40.8031	0.111764

100 bar absolute (10 MPa)

Superheated vapor at 10 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
350	0.0224422	2923.96	5.94580	4.01176	22.1774	0.0691043
400	0.0264393	3097.38	6.21393	3.09581	24.5525	0.0687146
450	0.0297850	3242.28	6.42172	2.74700	26.8021	0.0715600
500	0.0328129	3375.06	6.59932	2.58334	28.9660	0.0759224
600	0.0383775	3625.84	6.90451	2.46001	33.1173	0.0870768
700	0.0435944	3870.27	7.16957	2.43805	37.0984	0.100005
800	0.0486242	4114.73	7.40867	2.45554	40.9465	0.113904

125 bar absolute (12.5 MPa)

Superheated vapor at 12.5 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
350	0.0161392	2826.47	5.71277	5.44224	22.3789	0.0799636
400	0.0200315	3039.90	6.04311	3.55806	24.7327	0.0741298
450	0.0230208	3201.39	6.27476	2.98631	26.9851	0.0753164
500	0.0256313	3343.57	6.46496	2.73105	29.1509	0.0789011
600	0.0303054	3604.77	6.78291	2.53392	33.2971	0.0894167
700	0.0346094	3854.95	7.05423	2.48277	37.2659	0.102180
800	0.0387200	4103.06	7.29691	2.48524	41.0991	0.116111

150 bar absolute (15 MPa)

Superheated vapor at 15 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
350	0.0114807	2693.00	5.44350	8.78851	22.9078	0.101820
400	0.0156711	2975.55	5.88167	4.17778	25.0181	0.0810246
450	0.0184781	3157.84	6.14327	3.26874	27.2288	0.0796622
500	0.0208285	3310.79	6.34792	2.89595	29.3767	0.0822096
600	0.0249207	3583.31	6.67973	2.61201	33.4992	0.0919161
700	0.0286193	3839.48	6.95759	2.52884	37.4471	0.104453
800	0.0321182	4091.33	7.20394	2.51549	41.2606	0.118385

175 bar absolute (17.5 MPa)

Superheated vapor at 17.5 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
400	0.0124625	2902.28	5.72085	5.04696	25.4567	0.0902868
450	0.0152034	3111.34	6.02102	3.60453	27.5457	0.0847587
500	0.0173854	3276.68	6.24230	3.07977	29.6480	0.0859012
600	0.0210722	3561.46	6.58915	2.69442	33.7247	0.0945864
700	0.0243409	3823.88	6.87381	2.57629	37.6422	0.106825
800	0.0274035	4079.55	7.12391	2.54626	41.4310	0.120727

200 bar absolute (20 MPa)

Superheated vapor at 20 MPa. Coordinates are shown without padded zeros; calculated properties use six significant figures.
T (°C)	v (m³/kg)	h (kJ/kg)	s (kJ/kg·K)	cₚ (kJ/kg·K)	μ (μPa·s)	λ (W/m·K)
400	0.00994958	2816.84	5.55247	6.36010	26.1372	0.103687
450	0.0127202	3061.53	5.90407	4.00739	27.9529	0.0908269
500	0.0147929	3241.19	6.14455	3.28450	29.9707	0.0900392
600	0.0181844	3539.23	6.50767	2.78122	33.9744	0.0974397
700	0.0211327	3808.15	6.79942	2.62510	37.8513	0.109302
800	0.0238685	4067.73	7.05336	2.57753	41.6101	0.123139

Generated with iapws-if97@2.2.0; only states classified as superheated vapor or high-temperature superheated vapor are rendered. Methodology and verification.