ACMS ASTM A787 Aluminized Carbon Mild Steel Tube for Exhaust Systems

Material

ACMS ASTM A787 Type 1 tube is an electric-resistance-welded low-carbon steel mechanical tube made from aluminized steel strip. In practical terms, it combines a formable mild-steel substrate with an aluminum-silicon protective coating, giving the tube a useful balance of heat resistance, corrosion protection, weldability, and manufacturing economy for exhaust service. ASTM A787 covers metallic-coated ERW carbon steel mechanical tubing, and Type 1 is the aluminized version commonly selected where heat and corrosion resistance are important.

Specifications

• Product type: Aluminized carbon mild steel welded tube / exhaust tube

• Standard basis: ASTM A787/A787M, Type 1

• Manufacturing process: ERW forming and welding from metallic-coated low-carbon steel strip

• Base material: Low-carbon mild steel

• Coating type: Aluminum-silicon hot-dip coated surface

• Shape: Round tube is most common for exhaust routing; other shapes can be produced within mechanical-tubing practice

• ASTM covered size range: Outside diameter or maximum outside dimension from 1/2 in. to 15 in. (12.7 mm to 380.0 mm), with wall thickness from 0.028 in. to 0.180 in. (0.70 mm to 4.60 mm)

• Supply form: Mill lengths or cut lengths, plain ends, deburred ends, custom fabrication available

• Service focus: Exhaust assemblies, hot-gas transfer lines, and coated mechanical tubing rather than pressure line-pipe duty

Main Features

• Good resistance to heat cycling in exhaust applications

• Better corrosion protection than plain uncoated mild steel

• Good formability for bending, expanding, reducing, and routing

• Reliable weldability for downstream fabrication

• Cost-efficient material choice for standard exhaust systems

• Consistent dimensional control from ERW tube production

These advantages are why aluminized steel remains a widely used exhaust material: the steel core contributes strength and formability, while the Al-Si coating provides heat shielding and corrosion protection. It is also widely selected as a cost-effective alternative to stainless steel for many mainstream exhaust programs.

Our Advantages

1. Concern: Will the tube fail early from condensate, road salt, and external rusting?
Our solution is an aluminized low-carbon steel structure with a protective aluminum-silicon coating. This coating is used specifically where both heat resistance and corrosion resistance are required, making it well suited to exhaust environments.

2. Concern: Will it tolerate thermal cycling and continuous hot-gas exposure?
ASTM A787 Type 1 is the aluminized version of metallic-coated ERW tubing, and aluminized steel is explicitly used for heat-resisting applications. That gives buyers a proven material route for mufflers, resonators, tail pipes, and connector tubes.

3. Concern: Do I need stainless steel for every exhaust project?
Not always. For many OEM replacement, standard-duty, and cost-sensitive exhaust systems, aluminized carbon steel offers an efficient balance of durability, fabrication ease, and procurement cost. Stainless steel is typically preferred only when the corrosion target is substantially more severe or the service-life target is unusually high.

Chemical Composition

Because ASTM A787 governs the finished metallic-coated ERW tube rather than a single mandatory base-steel chemistry, buyers usually review representative low-carbon substrate grades when comparing forming and welding behavior. The table below lists standard chemistry limits for five relevant comparison grades.

Mechanical Properties

Execution Standards

ASTM
ASTM A787/A787M — Standard specification for electric-resistance-welded metallic-coated carbon steel mechanical tubing. This is the direct standard match for aluminized ERW exhaust tubing, with Type 1 covering aluminized tube.

EN
EN 10346 — Continuously hot-dip coated steel flat products, including AS aluminum-silicon coating. For welded precision tube conversion, EN 10305-3 is commonly referenced for welded cold-sized steel tubes.

GOST
GOST 10705 — Electric-welded steel pipes for general engineering and pipeline uses; often used as the closest Russian welded-tube reference when a direct aluminized exhaust-tube equivalent is not specified.

JIS
JIS G 3314 — Hot-dip aluminium-coated steel sheet and strip; a relevant coating standard for Al-coated substrate. For cold-reduced base material comparison, JIS G 3141 is also relevant.

GB
GB/T 36399 — Continuously hot-dip aluminium-silicon alloy coated steel sheet and strip. For the welded tube body, GB/T 13793 is the closest Chinese ERW tube reference.

Application Areas

ACMS ASTM A787 aluminized steel tube is mainly used in automotive exhaust systems, industrial hot-gas transfer, heating and ventilation equipment, and general fabricated mechanical assemblies that require both heat resistance and corrosion protection.

• Automotive exhaust systems: tail pipes, intermediate pipes, muffler shells, resonator tubes, connector tubes

• Commercial vehicle exhaust lines: extension pipes, branch tubes, after-treatment connecting sections

• Industrial hot-gas lines: heater ducts, warm-air transfer tubes, low-pressure flue sections

• HVAC and appliance components: heat-resistant duct sections, furnace connectors, protective housings

• General fabrication: formed coated tubes where appearance, bendability, and anti-rust performance are required

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

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