ASTM A792/A792M Galvalume Steel

Specifications

Basic Parameters

Product Name	ASTM A792/A792M Galvalume Steel
Thickness	0.15–4.0mm (commonly 0.3–2.0mm)
Width	600–1500mm
Length	Cut according to customer requirements
Coil inner diameter	508/610mm
Coating	AZ30, AZ35, AZ40, AZ50, AZ55, AZ60, AZ70, etc. (AZ30-AZ150)
Product Type	Coil/Sheet/Strip Coil
Surface Treatment	Passivation, oiling, fingerprint-resistant coating, pre-painting（PPGL）
MOQ	25 tons
Packaging	Standard export packaging (plastic film, moisture-proof paper, and galvanized iron sheet)

Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
CS	205–410	330–550	≥20
DS	140–300	270–420	≥30
FS	220–380	350–520	≥25
HTS	205–450	330–580	≥18

A792 Galvalume Steel Base Material Grades and Designations

1. Commercial Steel: CS (Type A/B/C)
2. Forming Steel: FS
3. Drawing Steel: DS
4. High Temperature Steel: HTS
5. Structural Steel: SS
6. High Strength Low Alloy Steel: HSLAS

Among these, Structural Steel (SS) is further subdivided into multiple grades based on mechanical properties, including Grade 33, Grade 37, Grade 40, Grade 50, and Grade 80.

Equivalent Steels to ASTM A792 Galvalume Steel

ASTM A792M	EN 10346	AS 1397	JIS G 3321
Cs type B Cs type C	DX51D+AZ	G2+AZ	SGLCC
DS	DX52D+AZ	G3+AZ	SGLCD
	DX53D+AZ		SGLCDD
	DX54D+AZ
SS 255	S250GD+AZ	G250+AZ
		G300+AZ	SGLC400
SS 345 Class1	S350GD+AZ	G350+AZ	SGLC440
SS 410 SS 480		G450+AZ	SGLC490
SS 550 Class1	S550GD+AZ	G550+AZ	SGLC570

A792/A792M Galvalume Steel Key Advantages

1. Excellent corrosion resistance: The aluminum-zinc alloy forms a dense aluminum oxide and zinc passivation layer that blocks moisture and corrosive agents. Its service life far exceeds that of galvanized steel coils.
2. High Heat Resistance: Withstands continuous use at temperatures up to 315°C and short-term exposure to temperatures as high as 500°C without coating peeling, oxidation, or discoloration.
3. High Thermal Reflectivity: Galvalume steel sheets have high thermal reflectivity, making them an ideal thermal insulation material that helps reduce building energy consumption.

A792/A792M Galvalume Steel Applications

• Construction Industry: Roofing sheets, soundproof walls, garages, modular homes, ceilings, perforated panels, light-gauge steel structures, metal wall panels, ventilation ducts, purlins, structural envelope systems, etc.
• Home Appliance Manufacturing: Refrigerator back panels, air conditioner housings, microwave ovens, LCD module back panels, ovens, washing machines, televisions, LED backlights, water heaters, electrical cabinets, and other housings and components.
• Automotive Industry: Mufflers, exhaust pipes, fuel tanks, windshield wiper components, truck bodies, underbody parts, heat shields for catalytic converters, highway signs, etc.
• Industrial Equipment: Heat exchangers, dryers, cooling towers, high- and low-voltage distribution boxes, electrical control cabinets, industrial freezers, vending machines, high- and low-voltage switchgear, etc.

FAQ

Q1: What is the difference between ASTM A792 and A792M? Can they be procured interchangeably?

A: These two specifications belong to the same standard but use different units of measurement. A792 uses imperial units, while A792M uses metric units; they can be procured interchangeably.

Q2: For SS structural steel, what applications are Grade 50 and Grade 80 suitable for, respectively? Is a higher grade always better?

A: Grade 50 has a yield strength of 340 MPa and is suitable for standard roofing, purlins, and general supports; Grade 80 has a yield strength of 550 MPa and is used for heavy-load, long-span load-bearing structures.

A higher grade is not necessarily better; as strength increases, forming and bending become more difficult. Selecting the grade that best matches the load requirements is the most cost-effective approach.

Q3: What is the maximum temperature that HTS high-temperature-resistant grades can withstand, and are they suitable for high-temperature equipment?

A: The long-term stable operating temperature can reach 315°C, with even stronger short-term high-temperature resistance. It is resistant to oxidation, discoloration, and coating failure, making it suitable for high-temperature applications such as oven casings, high-temperature insulation covers, and exhaust systems.

Q4: Which grade is most suitable for photovoltaic mounting brackets, industrial building roofs, and home appliance casings, respectively?

A: The CS grade is suitable for general factory building envelopes; the DS grade is recommended for home appliance casings and complex stamped parts; the SS structural grade is ideal for solar panel mounts and load-bearing purlins; and the FS forming grade is suitable for ventilation ducts and simple structural components.

Q5: What is the minimum order quantity? What is the lead time for stock items? Can you ensure stable supply for large-volume orders?

A: The minimum order quantity varies by grade but is generally ≥25 tons. To understand why our MOQ is so high, please refer to this article: Why Steel Mills Do Not Accept Small-Volume Orders.

Conclusion

The service life of Galvalume steel depends primarily not on thickness, but on the composition and structure of the coating. Only the right grade can fully unleash the performance of Galvalume steel. Please contact us, and our professional sales managers will recommend the Galvalume steel products best suited for your project.

Why Choose Us?

• With over 15 years of experience, our extensive production and export expertise has earned us a large base of loyal customers.
• We are certified to ISO 9001, ISO 14001, ISO 45001, and CE standards, and have successfully passed all customer-required third-party inspections by SGS (SGS example).
• We always operate with integrity as our guiding principle. With our own testing center, we manufacture products strictly according to customer requirements, consistently exceeding expectations.

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If you have project requirements for galvalume steel coils, please feel free to contact us at any time!