A387 Gr11 Alloy Steel Coil, ASTM A387 Grade11 Cr-Mo Steel Coil for Pressure Vessel & Boiler

ASTM A387 standard Cr-Mo steel for American pressure vessel projects
Good high-temperature strength and hydrogen resistance property
Excellent toughness and weldability for heavy pressure equipment
Hot & cold rolled available with reliable dimension control
Full material test report for ASME project acceptance

Product Overview

A387 Gr11 alloy steel coil is ASTM A387 Grade11 chromium molybdenum low alloy heat resistant steel for ASME pressure vessels, boilers and heat exchangers. We supply hot rolled coil (2.0–16.0mm) and cold rolled precision coil (0.3–3.0mm). Custom processing service including slitting, cutting, bending, beveling and heat treatment is supported. It is widely used in petrochemical equipment, hydrogen containing pressure vessel, boiler header and heat exchanger components for US standard industrial projects. Export order comes with EN10204 mill test certificate for full material traceability.

Alloy Steel Coil

Chemical & Mechanical Property Snapshot

Grade	C (%)	Si (%)	Mn (%)	Cr (%)	Mo (%)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
A387 Gr11	0.05–0.17	0.44–0.86	0.35–0.73	1.00–1.50	0.44–0.65	≥275	415–585	≥18

Detailed Technical Specifications

Technical Item	Specification
Product Name	A387 Gr11 Alloy Steel Coil
Material Type	ASTM A387 Grade11 Cr-Mo Heat Resistant Steel
Main Standards	ASTM A387, ASTM A20/A20M, EN 10204, GB/T709
Hot-Rolled Thickness	2.0–16.0 mm
Hot-Rolled Mother Coil Width	1000 / 1250 / 1500 mm
Hot-Rolled Slitting Width	Minimum 15 mm
Hot-Rolled Coil ID	508 mm standard; 610 mm customizable
Hot-Rolled Single Coil Weight	5–28 tons
Hot-Rolled Thickness Tolerance	±0.2–0.8 mm
Flatness	Meets EN and GB rolling specifications
Cold-Rolled Thickness	0.3–3.0 mm
Cold-Rolled Maximum Width	1250 mm
Cold-Rolled Dimensional Tolerance	±0.01 mm
Cold-Rolled Surface Options	Pickled black surface, bright annealed finish, anti-rust oil treatment
Processing Services	Slitting, flattening, cutting into steel plates, custom-size shearing, roll bending, bevel preparation
Heat Treatment	Normalizing and tempering
Documentation	EN 10204 Mill Test Certificate (MTC)
Material Traceability	Chemical composition and mechanical-property traceability
Typical Industries	Petrochemical, oil & gas, thermal power, ASME pressure vessel manufacturing
Typical Applications	ASME pressure vessel, boiler headers, heat exchanger, hydrogen service equipment
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit
Package	Waterproof paper + galvanized steel strap + seaworthy export wooden pallet

Product Comparison Table

Item	Hot-Rolled A387 Gr11 Alloy Steel Coil	Cold-Rolled Precision A387 Gr11 Alloy Steel Coil
Thickness	2.0–16.0 mm	0.3–3.0 mm
Width	1000 / 1250 / 1500 mm Mother Coil	Max. 1250 mm
Dimensional Tolerance	Thickness tolerance ±0.2–0.8 mm	Dimensional tolerance ±0.01 mm
Surface	According to hot-rolled specification	Pickled black, bright annealed, anti-rust oil
Slitting	Minimum cutting width 15 mm	Precision processing available according to requirements
Coil ID	508 mm standard; 610 mm customizable	508 mm customizable
Coil Weight	5–28 tons	0.5–10 tons
Typical Requirement	Heavy gauge for ASME pressure vessel fabrication	Thin precision parts with tight tolerance
Processing	Cutting, shearing, bending, beveling, normalizing, tempering	Cutting, shearing, bending, beveling, heat treatment
Typical Applications	ASME pressure vessel, boiler, petrochemical equipment	Thin precision heat exchanger & pressure fittings

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

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Methanol pressure vessels, high-temperature cracking equipment

Assembly of Pressure-bearing components in the wellhead of an oilfield well

Finished products of air compressor air storage tank and boiler air collecting tank

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is A387 Gr11 steel used for?

A387 Gr11 is ASTM Cr-Mo steel for ASME pressure vessels, boilers, heat exchangers, equipment under high temperature and hydrogen service.

What is the difference between A387 Gr11 and Gr22?

A387 Gr22 has higher chromium and molybdenum content, better corrosion and high-temperature performance than Gr11.

Can you supply A387 Gr11 coil with ASME test report?

Yes, we supply EN10204 3.1 MTC to meet ASME project inspection requirement.

What processing service for A387 Gr11 coil?

Slitting, cutting plate, bending, bevel, normalizing and tempering heat treatment available.

What is your MOQ for A387 Gr11 coil?

5 tons minimum order quantity.

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A387 Gr11 Alloy Steel Coil, ASTM A387 Grade11 Cr-Mo Steel Coil for Pressure Vessel & Boiler