R-454B Pressure Level Chart

Modified on Mon, 28 Jul at 2:01 PM

R-454B Pressure Level Chart and Physical Properties

R-454B is a low Global Warming Potential (GWP) HFC/HFO zeotropic blend refrigerant designed to replace R-410A. This article provides a comprehensive pressure-temperature chart along with key physical and environmental properties for R-454B.

Pressure-Temperature Chart (Vapor Pressure in PSIG)

°F	°C	R-454B PSIG	°F	°C	R-454B PSIG
-40	-40.0	9.5	60	15.6	161.0
-35	-37.2	12.7	65	18.3	175.3
-30	-34.4	16.3	70	21.1	190.4
-25	-31.7	20.1	75	23.9	206.4
-20	-28.9	24.3	80	26.7	223.3
-15	-26.1	28.9	85	29.4	241.1
-10	-23.3	34.0	90	32.2	260.0
-5	-20.6	39.4	95	35.0	279.9
0	-17.8	45.3	100	37.8	300.8
5	-15.0	51.7	105	40.6	322.8
10	-12.2	58.6	110	43.3	346.0
15	-9.4	66.0	115	46.1	370.4
20	-6.7	74.0	120	48.9	395.9
25	-3.9	82.5	125	51.7	422.8
30	-1.1	91.7	130	54.4	450.9
35	1.7	101.5	135	57.2	480.4
40	4.4	111.9	140	60.0	511.3
45	7.2	123.1	145	62.8	543.6
50	10.0	135.0	150	65.6	577.4
55	12.8	147.6

Physical Properties of R-454B

Environmental Classification	HFC/HFO Zeotropic Blend
Molecular Weight	62.614 g/mol
Boiling Point (1 atm)	-58.9°F
Critical Pressure	763.9 psia
Critical Temperature	172.6°F
Critical Density	27.7 lb/ft³
Vapor Density (bp)	0.2 lb/ft³
Heat of Vaporization (bp)	52.7 BTU/lb
Ozone Depletion Potential (ODP)	0
Global Warming Potential (GWP)	467
ASHRAE 34 Safety Classification	A2L

Liquid Density by Temperature

Temperature	lb/ft³	lb/gal
-80°F	79.3	10.6
-40°F	75.5	10.1
0°F	71.2	9.5
40°F	66.5	8.9
80°F	61.0	8.2
120°F	54.0	7.2

Composition

R-454B Components:
- R-32 (68.9%) – Difluoromethane
- R-1234yf (31.1%) – 2,3,3,3-Tetrafluoroprop-1-ene
Boiling Point @ 0 PSIG: -58.9°F