RefrigerantASHRAE R-513A

R513A PT Chart

Q: What lubricant does R-513A use?

Polyolester (POE) oil, the same lubricant family as R-134a [xp10retrofit, p. 2]. Use the oil the equipment maker specifies. Chemours says the POE already in most R-134a systems should be suitable [xp10retrofit, p. 2].

Updated October 19, 2026

R-513A

A1 Lower toxicity, no flame propagationHFC/HFO blend AIM Act HFC

Illustration of a refrigerant cylinder painted light green gray (RAL 7044), the color AHRI Guideline N-2017 calls for on all new refrigerant containers from 2020^{[11], section 4.8}. Label: R-513A, safety class A1, GWP 630. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants^{[11], section 4.7}.

R-134a/R-1234yf (44/56)

An azeotropic blend of 56% R-1234yf and 44% R-134a by mass^[5], A1^[2], sold by Chemours as Opteon™ XP10^[4]. GWP 630 on the US EPA basis, about 56% below R-134a's 1,430^[7].

R-513A saturation pressure is 39.8 PSIG at 40°F, 77.2 PSIG at 70°F, and 131.4 PSIG at 100°F. These are the gauge readings on a static, fully-saturated system; a running system's high side sits well above them. The full table below runs from −40°F to 150°F in 1°F steps.

Checked against the Chemours Opteon™ XP10 pressure-temperature chart^[12] at 34 points from 0 to 260 psig: largest difference 0.37°F.

Saturation @ 70°F

77.2 PSIG

GWP (100-yr)

630 US EPA value, 40 CFR 84.64(b)

Temperature glide

under 0.1°F

Boiling point

−20.9°F

Sourced facts

ASHRAE safety class: A1^[2]
Composition (mass): 56% R-1234yf / 44% R-134a^[5]
GWP (100-yr): 630^[7]
ODP: 0^[14]
Normal boiling point: bubble −20.9°F (−29.4°C), dew −20.8°F (−29.3°C)^[3]
Temperature glide: under 0.1°F at a 40°F dew point^[3]
Lubricant: POE^[4]
Trade name: Opteon™ XP10^[4]

R-513A PT calculator Superheat

R-513A PT chart — printable saturation table

Looking for the R-513A PT chart PDF for shop reference? The complete pressure-temperature saturation table is below: every 1° increment from −40°F to 150°F (or to the refrigerant's critical temperature). Use the Print / Save as PDF button in the table header to download a clean, table-only PDF (the rest of the page is hidden from the print output).

R-513A PT Chart — Pressure-Temperature Saturation Table

Computed with CoolProp 7.2.0 in 1°F steps · hvacptcharts.com

R-513A · 1° increments · °F / PSIG

Tinted rows: NBP atmospheric crossover · 32°F H₂O freeze

R-513A pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)	Pressure (PSIG)
−40°F	11.8 in. Hg vac.
−39°F	11.3 in. Hg vac.
−38°F	10.7 in. Hg vac.
−37°F	10.2 in. Hg vac.
−36°F	9.7 in. Hg vac.
−35°F	9.1 in. Hg vac.
−34°F	8.6 in. Hg vac.
−33°F	8.0 in. Hg vac.
−32°F	7.4 in. Hg vac.
−31°F	6.8 in. Hg vac.
−30°F	6.2 in. Hg vac.
−29°F	5.5 in. Hg vac.
−28°F	4.9 in. Hg vac.
−27°F	4.3 in. Hg vac.
−26°F	3.6 in. Hg vac.
−25°F	2.9 in. Hg vac.
−24°F	2.2 in. Hg vac.
−23°F	1.5 in. Hg vac.
−22°F	0.8 in. Hg vac.
−21°F NBP (atmospheric)	0.0 in. Hg vac.
−20°F	0.4
−19°F	0.7
−18°F	1.1
−17°F	1.5
−16°F	1.9
−15°F	2.3
−14°F	2.7
−13°F	3.1
−12°F	3.6
−11°F	4.0
−10°F	4.5
−9°F	4.9
−8°F	5.4
−7°F	5.9
−6°F	6.3
−5°F	6.8
−4°F	7.3
−3°F	7.8
−2°F	8.4
−1°F	8.9
0°F	9.4
1°F	10.0
2°F	10.5
3°F	11.1
4°F	11.7
5°F	12.2
6°F	12.8
7°F	13.4
8°F	14.0
9°F	14.7
10°F	15.3
11°F	16.0
12°F	16.6
13°F	17.3
14°F	18.0
15°F	18.6
16°F	19.3
17°F	20.1
18°F	20.8
19°F	21.5
20°F	22.3
21°F	23.0
22°F	23.8
23°F	24.6
24°F	25.4
25°F	26.2
26°F	27.0
27°F	27.8
28°F	28.7
29°F	29.5
30°F	30.4
31°F	31.3
32°F H₂O freeze	32.2
33°F	33.1
34°F	34.0
35°F	34.9
36°F	35.9
37°F	36.8
38°F	37.8
39°F	38.8
40°F	39.8
41°F	40.8
42°F	41.9
43°F	42.9
44°F	44.0
45°F	45.1
46°F	46.1
47°F	47.3
48°F	48.4
49°F	49.5
50°F	50.7
51°F	51.8
52°F	53.0
53°F	54.2
54°F	55.4
55°F	56.7
56°F	57.9
57°F	59.2
58°F	60.5
59°F	61.8
60°F	63.1
61°F	64.4
62°F	65.8
63°F	67.2
64°F	68.5
65°F	69.9
66°F	71.4
67°F	72.8
68°F	74.3
69°F	75.7
70°F	77.2
71°F	78.7
72°F	80.3
73°F	81.8
74°F	83.4
75°F	85.0
76°F	86.6
77°F	88.2
78°F	89.9
79°F	91.5
80°F	93.2
81°F	94.9
82°F	96.7
83°F	98.4
84°F	100.2
85°F	102.0
86°F	103.8
87°F	105.6
88°F	107.4
89°F	109.3
90°F	111.2
91°F	113.1
92°F	115.1
93°F	117.0
94°F	119.0
95°F	121.0
96°F	123.0
97°F	125.1
98°F	127.1
99°F	129.2
100°F	131.4
101°F	133.5
102°F	135.7
103°F	137.8
104°F	140.1
105°F	142.3
106°F	144.5
107°F	146.8
108°F	149.1
109°F	151.5
110°F	153.8
111°F	156.2
112°F	158.6
113°F	161.0
114°F	163.5
115°F	166.0
116°F	168.5
117°F	171.0
118°F	173.6
119°F	176.2
120°F	178.8
121°F	181.4
122°F	184.1
123°F	186.8
124°F	189.5
125°F	192.3
126°F	195.0
127°F	197.9
128°F	200.7
129°F	203.5
130°F	206.4
131°F	209.4
132°F	212.3
133°F	215.3
134°F	218.3
135°F	221.3
136°F	224.4
137°F	227.5
138°F	230.6
139°F	233.8
140°F	237.0
141°F	240.2
142°F	243.4
143°F	246.7
144°F	250.0
145°F	253.4
146°F	256.7
147°F	260.1
148°F	263.6
149°F	267.1
150°F	270.6

R-513A pressure-temperature saturation table in Celsius and kPa
Temp (°C)	Pressure (kPa)
−40°C	−40
−39°C	−37
−38°C	−34
−37°C	−30
−36°C	−27
−35°C	−23
−34°C	−19
−33°C	−15
−32°C	−11
−31°C	−7
−30°C	−3
−29°C NBP (atmospheric)	2
−28°C	7
−27°C	11
−26°C	16
−25°C	22
−24°C	27
−23°C	33
−22°C	38
−21°C	44
−20°C	51
−19°C	57
−18°C	63
−17°C	70
−16°C	77
−15°C	84
−14°C	92
−13°C	99
−12°C	107
−11°C	115
−10°C	124
−9°C	132
−8°C	141
−7°C	150
−6°C	160
−5°C	169
−4°C	179
−3°C	189
−2°C	200
−1°C	211
0°C H₂O freeze	222
1°C	233
2°C	245
3°C	257
4°C	269
5°C	282
6°C	294
7°C	308
8°C	321
9°C	335
10°C	349
11°C	364
12°C	379
13°C	394
14°C	410
15°C	426
16°C	442
17°C	459
18°C	476
19°C	494
20°C	512
21°C	530
22°C	549
23°C	569
24°C	588
25°C	608
26°C	629
27°C	650
28°C	671
29°C	693
30°C	715
31°C	738
32°C	762
33°C	785
34°C	810
35°C	834
36°C	860
37°C	885
38°C	912
39°C	938
40°C	966
41°C	993
42°C	1,022
43°C	1,051
44°C	1,080
45°C	1,110
46°C	1,141
47°C	1,172
48°C	1,204
49°C	1,236
50°C	1,269
51°C	1,303
52°C	1,337
53°C	1,372
54°C	1,407
55°C	1,443
56°C	1,480
57°C	1,518
58°C	1,556
59°C	1,594
60°C	1,634
61°C	1,674
62°C	1,715
63°C	1,756
64°C	1,798
65°C	1,841
66°C	1,885

CoolProp 7.2.0 · PSIG/kPa = gauge · PSIA = PSIG + 14.6959 · kPa(abs) = kPa(gauge) + 101.325

Full saturation values at 1° increments. Toggle between °F / PSIG and °C / kPa. Use Print / Save as PDF for laminated shop reference, or download the CSV / JSON below for use in other tools. R-513A PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).

Lower toxicity, no flame propagation

Lower toxicity (Occupational Exposure Limit ≥ 400 ppm). No flame propagation in air at standard atmospheric pressure and 60°C. R-134a, R-22, R-410A, R-404A, R-744 (CO2) are A1.

Flammability: None (no flame propagation)
Toxicity: Lower (OEL ≥ 400 ppm)

Classification per ANSI/ASHRAE Standard 34-2022^{[2], safety group definitions and refrigerant safety classifications}. See full reference.

Saturation pressure-temperature curve

Pressure

Temperature

Highlight at°F

Quick lookup — R-513A

Temp:°F

77.2PSIG(533 kPa)

Range: −40 to 150°F Open full PT calculator →

Common service temperatures

32°F

32PSIG

Freezing

45°F

45PSIG

Heat-pump heat

70°F

77PSIG

Standard

75°F

85PSIG

Test ref

80°F

93PSIG

Warm

95°F

121PSIG

Summer peak

Saturation values from CoolProp 7.2.0 mixture model: R-134a/R-1234yf, 44/56% by mass^[3]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.

At a glance

Chemistry

R-134a/R-1234yf (44/56)

Binary HFC/HFO blend

Lubricant compatibility

POEMO

POE required. Azeotropic (negligible glide)^{[4], p. 1}. Chemours lists it as an R-134a replacement for air conditioning and refrigeration, for retrofits and new equipment^[6].

Blend composition

R-134a 44.0%
R-1234yf 56.0%

Trade names

Opteon™ XP10 — Chemours^[4]

Common applications

Medium-temperature supermarket cases
Heat pumps
R-134a retrofit

Properties

Boiling point (1 atm)
bubble −20.9°F (−29.4°C), dew −20.8°F (−29.3°C)
Critical point
No single point — blend critical locus
Molar mass
108.43 g/mol
Temperature glide
under 0.1°F
ODP
0
GWP (100-yr)
630 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 573 · AR6 673
New-equipment status (US)
Restricted in 20 new-equipment categories — US new-equipment rules (40 CFR 84.54).

What is R-513A?

R-513A is an azeotropic binary blend of 44% R-134a (HFC) and 56% R-1234yf (HFO) by mass^[5].

Where R-513A is used

R-134a replacement in air conditioning and refrigeration (retrofit and new equipment)^[6]

Service notes

Chemours' retrofit guidelines say the POE lubricant already in most R-134a systems should be suitable for R-513A (Opteon™ XP10); change it if it is contaminated or has a high acid number^{[4], p. 2}. R-513A is an azeotrope with negligible glide, so its dew and bubble temperatures are essentially the same^{[4], p. 1}.

A1 classification means no A2L procedures required.

Operating cycle

Phase-down timeline

R-513A contains HFC-134a, a regulated substance under the AIM Act^{[1], 42 U.S.C. 7675(c)(1)}. Its GWP under 40 CFR 84.64 is 630, at or above the limit in 20 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-513A”).

From January 1, 2032 — new supermarket systems: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system^{[10], §84.54(c)(12)(ii)}.

R-513A (GWP 630) is under the 1,400 limit for new supermarket systems that starts on January 1, 2027, so it can be installed in them until the stricter limits start on January 1, 2032^{[10], §84.54(c)(12)}.

R-513A is not restricted in new residential & light-commercial AC and heat pumps (its 84.64 GWP 630 is below that subsector's limit).^{[10], §84.54(a)(1), (c)(1), (c)(2)}

HFC production & consumption allowances step down to 30% of baseline in 2029–2033, 20% of baseline in 2034–2035, and 15% of baseline in 2036 and later (42 U.S.C. 7675(e)(2)(C))^[1].

Full 40 CFR 84.54 new-equipment rules for R-513A →

US new-equipment rules (40 CFR 84.54)

R-513A contains HFC-134a, a regulated substance under the AIM Act^{[1], 42 U.S.C. 7675(c)(1)}. Under 40 CFR 84.64(b) its GWP is 630: each component's GWP times its mass fraction; components without a GWP under 84.64 are left out (84.64(c)). That value is compared against each 40 CFR 84.54 subsector limit below.

Effective	Equipment subsector	Limit	Restriction	¶
January 1, 2032	Supermarket systems	GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)	Installation	(c)(12)(ii)

Installable in new supermarket systems until January 1, 2032.
Not restricted in new residential & light-commercial AC and heat pumps.

All 84.54 categories restricting R-513A (20)^[10]

Refrigeration, air conditioning & heat pumps (13)
January 1, 2025	Household refrigerators and freezers	GWP ≥ 150	(a)(3)
January 1, 2025	Retail food refrigeration — stand-alone units	GWP ≥ 150	(a)(4)
January 1, 2025	Vending machines	GWP ≥ 150	(a)(5)
January 1, 2026	Industrial process refrigeration products (non-chiller), charge 200 lb or greater, refrigerant entering the evaporator warmer than −22°F (−30°C)	GWP ≥ 150	(a)(12)(i)
January 1, 2026	Industrial process refrigeration products (non-chiller), charge less than 200 lb, refrigerant entering the evaporator warmer than −22°F (−30°C)	GWP ≥ 300	(a)(12)(ii)
January 1, 2026	Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h	GWP ≥ 150	(a)(8)(i)
January 1, 2026	Industrial process refrigeration systems (non-chiller), charge 200 lb or greater, evaporator inlet warmer than −22°F (−30°C), not the high-temperature side of a cascade	GWP ≥ 150	(c)(10)(i)
January 1, 2026	Industrial process refrigeration systems (non-chiller), charge less than 200 lb, evaporator inlet warmer than −22°F (−30°C)	GWP ≥ 300	(c)(10)(ii)
January 1, 2026	Industrial process refrigeration — high-temperature side of cascade systems, evaporator inlet warmer than −22°F (−30°C)	GWP ≥ 300	(c)(10)(iii)
January 1, 2027	Refrigerated food processing and dispensing products outside the scope of UL 621, charge 500 g or less	GWP ≥ 150	(a)(9)(i)
January 1, 2032	Retail food refrigeration — remote condensing units	GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)	(c)(11)(ii)
January 1, 2032	Supermarket systems	GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)	(c)(12)(ii)
January 1, 2032	Cold storage warehouse systems	GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side)	(c)(9)(ii)
Motor vehicle air conditioning (3)
October 24, 2024	Motor vehicle air-conditioning in Model Year 2025 and later light-duty passenger cars and trucks (gross vehicle weight rating under 8,500 lb)	GWP ≥ 150	(a)(13)(i)
Model Year 2028	Motor vehicle air-conditioning in medium-duty passenger vehicles, heavy-duty pickup trucks and complete heavy-duty vans whose air-conditioning will not be modified by upfitters	GWP ≥ 150	(a)(13)(ii)
January 1, 2028	Motor vehicle air-conditioning in certain nonroad vehicles (agricultural tractors over 40 horsepower; self-propelled agricultural machinery; compact equipment; construction, forestry and mining equipment; and commercial utility vehicles)	GWP ≥ 150	(a)(13)(iii)
Foam blowing agents (2)
January 1, 2025	Foam products: rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, slabstock; flexible polyurethane; integral skin polyurethane; polystyrene (extruded boardstock, billet, extruded sheet); phenolic insulation board and bunstock; polyisocyanurate laminated boardstock; polyolefin; rigid polyurethane spray foam	GWP ≥ 150	(a)(14)
January 1, 2026	Foam products in the (a)(14) formulations for use in space and military applications	GWP ≥ 150	(a)(15)
Aerosol propellants / solvents (2)
January 1, 2025	Aerosol products	GWP ≥ 150	(a)(16)(i)
January 1, 2028	Aerosol products (all, except defense sprays as defined in 84.3)	GWP ≥ 150	(a)(16)(ii)

Servicing. 40 CFR 84.54 restricts new manufacture/import, later sale/distribution, and installation. "Installation" is defined in 84.54(e); repairing or servicing existing R-513A equipment is not an installation unless it meets 84.54(e), so existing systems can keep being serviced. From January 1, 2029, servicing or repairing R-513A equipment in supermarket systems, refrigerated transport or automatic commercial ice makers must be done with reclaimed refrigerant^[13].

EU (retail-food / cold-storage)

Under Regulation (EU) No 517/2014, since replaced by (EU) 2024/573, applying from March 11, 2024 (compared against the AR4 headline GWP), R-513A's GWP is at or above the limit in:

Annex III row 11: Refrigerators and freezers for commercial use (hermetically sealed equipment) — GWP ≥ 150, from January 1, 2022.
Annex III row 13: Multipack centralised refrigeration systems for commercial use with a rated capacity of 40 kW or more — GWP ≥ 150, from January 1, 2022 (the primary refrigerant circuit of a cascade system may use GWP below 1,500).

Regulation (EU) No 517/2014.

Source: 40 CFR 84.54, current through 91 FR 31329 (May 26, 2026). Installation defined at 40 CFR 84.54(e).

Global warming potential, in context

Commercial refrigeration — medium temperature

Retrofit and replacement paths

R-513A replaces

R-134a A1 · GWP 1,430

Replacements for R-513A

Reading the R-513A PT chart — single curve, azeotropic

Bubble and dew temperatures are essentially the same. Chemours notes negligible differences between the dew and bubble points^{[4], p. 3}. The PT chart shows a single saturation curve, identical in structure to pure refrigerant charts like R-134a or R-22.

For service measurement: superheat = suction-line temperature − saturation temperature at suction pressure; subcooling = saturation temperature at liquid-line pressure − liquid-line temperature. No glide correction needed.

R-513A vs R-134a, R-1234yf, R-450A, R-516A: saturation pressure

Saturation pressure (PSIG, gauge) for R-513A vs R-134a, R-1234yf, R-450A, R-516A — zeotropic blends shown as dew / bubble. Each column shows the percent difference from R-513A. Sources: R-513A, R-134a, R-1234yf and R-516A: CoolProp 7.2.0 dataset; R-450A: CoolProp 8.0.0 dataset.
Temp	R-513A	R-134a	R-1234yf	R-450A	R-516A
0°F	9.4	6.5	9.2	3.8 / 4.3	9.2
40°F	39.8	35.0(−12%)	38.4(−3%)	28.9 / 29.8(−25%)	38.9(−2%)
70°F	77.2	71.1(−8%)	73.9(−4%)	60.6 / 62.0(−20%)	75.2(−3%)
100°F	131.4	124.2(−5%)	124.9(−5%)	107.3 / 109.3(−17%)	127.4(−3%)

Frequently asked

›What is the normal operating pressure of R-513A?

Operating pressure depends on evaporator load and ambient. The saturation pressures are in the PT table and the comparison table on this page.

›Can I retrofit R-134a to R-513A without oil change?

Yes. Chemours' guidelines say the POE already in most R-134a systems should be suitable, and suggest an initial charge of about 85% of the original R-134a charge, ending near 97% after adjustment^{[4], pp. 2, 4}.

Change the oil if it is contaminated or has a high acid number^{[4], p. 2}.

›What does R-513A's GWP of 630 mean?

On the US EPA basis R-513A's GWP is 630, so releasing 1 kg absorbs about 630 times as much energy over 100 years as releasing 1 kg of CO₂^[7]^[8]. That is about 56% lower than R-134a's 1,430.

Its GWP (630) is lower than R-134a's but higher than R-1234ze(E)'s (1) or R-515B's (287)^[7]^[9].

›Does R-513A have temperature glide?

Negligible. Chemours describes Opteon™ XP10 as an azeotrope with negligible glide^{[4], p. 1}.

›What lubricant does R-513A use?

Polyolester (POE) oil, the same lubricant family as R-134a^{[4], p. 2}. Use the oil the equipment maker specifies. Chemours says the POE already in most R-134a systems should be suitable^{[4], p. 2}.

›What's the difference between R-513A and R-450A?

Both are A1. R-513A is an azeotrope (500 series); R-450A is a zeotropic blend (400 series)^[2]. R-513A (Opteon™ XP10) is a blend of 56% R-1234yf and 44% R-134a^[5] with a GWP of 630^[7]. R-450A is a blend of 42% R-134a and 58% R-1234ze(E)^[5] with a GWP of 601^[7].

R-450A's GWP (601) is slightly lower than R-513A's (630)^[7], and it uses R-1234ze(E) instead of R-1234yf^[5].

›Is R-513A safe to handle?

ASHRAE safety group A1: lower toxicity and no flame propagation^[2]. No A2L-specific requirements.

›Can R-513A be used in new chillers?

Yes. Its GWP (630) is under the 700 limit for new comfort-cooling chillers in 40 CFR 84.54(a)(10)(i)^[10]^[7], and Chemours lists it for new equipment as well as retrofits^[6].

Download this dataset

Full PT chart for R-513A · CC BY 4.0 · attribute the source

CSV JSON

Sources & citations

[1]
42 U.S.C. 7675 — American Innovation and Manufacturing Act. US Code (via Cornell LII). current. https://www.law.cornell.edu/uscode/text/42/7675 (accessed October 2, 2026)
[2]
ANSI/ASHRAE Standard 34-2022, Designation and Safety Classification of Refrigerants (free read-only version). ASHRAE. 2022. https://www.ashrae.org/technical-resources/standards-and-guidelines/read-only-versions-of-ashrae-standards (accessed October 2, 2026)
[3]
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