Resin Grade Cross-Reference: Specs and Equivalents

The short answer

This cross-reference covers 10 widely used resin grades. For each one we list the published melt flow and density from the producer's data sheet and up to four grades from other producers to ask about. Use it to find a second source or a starting point when your grade is short, then confirm with data sheets and a trial.

Find a grade

Type a grade, brand or resin to filter the tables below. Each grade has its own page with data sheet values, grades from other producers with similar published specs, and what to check before switching.

Polypropylene

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
Pro-fax 6523	LyondellBasell	PP homopolymer	4.0 g/10 min 230°C / 446°F, 2.16 kg, ASTM D1238	0.90 g/cm³	Braskem PP H521, ExxonMobil PP2252E4, Formolene 1102KR
ExxonMobil PP1024E4	ExxonMobil	PP homopolymer	13 g/10 min 230°C / 446°F, 2.16 kg, ASTM D1238	0.900 g/cm³	Pro-fax 6331, Formolene 4100N

Polyethylene

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
DOWLEX 2045G	Dow	LLDPE film resin	1.0 g/10 min 190°C / 374°F, 2.16 kg, ASTM D1238	0.920 g/cm³	SCLAIR FP120-A, Petrothene GA601030
Marlex HHM 5502BN	Chevron Phillips Chemical	HDPE blow molding	0.35 g/10 min 190°C / 374°F, 2.16 kg, ASTM D1238	0.955 g/cm³	Formolene HB5502B, NOVAPOL HB-L354-A, Alathon L5840

Polystyrene

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
HIPS 7240	TotalEnergies	TotalEnergies HIPS	4.5 g/10 min 200°C / 392°F, 5 kg, ISO 1133 H	1.04 g/cm³	STYRON EB6755, STYRON 421, Styrolution PS 5400
Styron 478	AmSty	HIPS	6.0 g/10 min 200°C / 392°F, 5 kg, ASTM D1238	1.04 g/cm³	TotalEnergies Polystyrene 825, Styrolution PS 5600

ABS, PC and PC/ABS

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
Cycolac MG47	SABIC	ABS	5.6 g/10 min 230°C / 446°F, 3.8 kg, ASTM D1238	1.04 g/cm³	Lustran 348, MAGNUM 342 EZ, MAGNUM 3453
LEXAN 141R	SABIC	polycarbonate	11 g/10 min 300°C / 572°F, 1.2 kg, ASTM D1238	1.20 g/cm³	Makrolon 2605, CALIBRE 301-10

Nylon

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
Zytel 101L	Celanese	nylon 66	Not published (viscosity number 150 cm³/g)	1.14 g/cm³	Vydyne 21SPC, Ultramid A3K

Acetal

Grade	Producer	Type	Melt flow	Density	Similar grades to ask about
Delrin 500P	Delrin USA, LLC	acetal homopolymer	MFR 15 g/10 min, MVR 13 cm³/10 min 190°C / 374°F, 2.16 kg, ISO 1133	1.42 g/cm³	Hostaform C 13021, Celcon M140, Celcon M90

How to use a cross-reference safely

Do not see your grade? Look up the brand in the trade name decoder or send us the grade name; a polymer chemist will tell you what it is and what we can quote.

Treat listed grades as starting points to ask about, not drop-in replacements.
Compare melt flow, density and impact at the same test condition and method.
Check the additive package (nucleator, slip, antistat, UV, mold release) and color.
If a drawing, UL file or customer approval names a grade, a change needs approval and usually a trial.
Ask for the producer's regulatory letter for food contact or medical use for the exact grade.

Common questions

What is a resin grade cross-reference?

A list that maps a specific producer grade to grades from other producers with similar published specs, such as melt flow, density and stiffness, so a buyer knows what to ask about as a possible equivalent.

Are cross-referenced grades interchangeable?

No. They are starting points. Additive packages, processing behavior, color and approvals differ, so compare data sheets and run a trial before switching.

Can you quote a grade that is not listed?

Yes. Send the grade name and volume; a polymer chemist checks it and we quote it where we can source it, or a qualified equivalent.

If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.

Resin grade cross-reference