Steel Shell/Plate: Thickness Range 12-50 mm

Component Specifications

Definition

A steel shell or plate is a critical structural component in industrial hearth bottoms, typically fabricated from high-temperature resistant steel alloys. It serves as the foundational layer that contains the refractory lining, withstands thermal expansion stresses, and supports the weight of materials processed within the hearth. This component ensures dimensional stability under cyclic heating and cooling while preventing heat loss and structural deformation.

Working Principle

The steel shell/plate operates on principles of thermal management and structural integrity. It acts as a containment barrier that distributes thermal stresses evenly across the hearth structure while maintaining a sealed environment for high-temperature processes. Its design accommodates differential expansion between refractory materials and the outer structure through controlled flexibility or expansion joints.

Materials

High-temperature carbon steel (ASTM A516 Gr.70), heat-resistant alloy steel (ASTM A387 Gr.11/22), or stainless steel (304/316L) with chromium content 16-26% for corrosion resistance. Thickness typically ranges from 12-50mm depending on furnace size and operating temperature (up to 1200°C).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Finish	SA 2.5 blasted or pickled
Yield Strength	≥245 MPa
Thickness Range	12-50 mm
Flatness Tolerance	≤3 mm/m²
Thermal Conductivity	45-60 W/m·K
Operating Temperature	Up to 1200°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, DIN 17100, ASTM A516, ASME BPVC Section II

Parent Products

This component is used in the following industrial products

Hearth Bottom

The bottom structural component of a hearth that supports materials during heating processes.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal fatigue cracking
Creep deformation at high temperatures
Corrosion from process gases
Refractory detachment due to differential expansion

FMEA Triads

Trigger: Cyclic thermal stress exceeding material fatigue limits
Failure: Crack propagation leading to structural failure
Mitigation: Implement controlled heating/cooling cycles, use expansion joints, apply thermal barrier coatings

Trigger: Inadequate material specification for operating conditions
Failure: Premature material degradation or deformation
Mitigation: Conduct thorough thermal analysis, select appropriate alloy grades, implement temperature monitoring systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance ±2mm, flatness ≤0.3% of diagonal length, thickness tolerance ±10% of nominal

Test Method

Ultrasonic thickness testing, dye penetrant inspection, dimensional verification per ISO 9013, material certification per EN 10204 3.1

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Steel Shell/Plate

Manufacturer profiles associated with Steel Shell/Plate.

Sourcing Steel Shell/Plate from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Work Rolls

Work rolls are precision cylindrical components in heavy-duty rolling mills that directly contact and deform metal during rolling operations.

Venting Channels

Venting channels are precision-engineered passages in metal casting mold cores designed to allow gases to escape during the molten metal pouring process, preventing defects and ensuring high-quality castings.

Aluminum Matrix

Aluminum matrix is the continuous metallic phase in aluminum matrix composites, providing structural integrity and thermal/electrical conductivity in hot-forged aluminum alloy billets.

Grain Structure

The crystalline arrangement of atoms in hot-forged aluminum alloy billets, determining mechanical properties and performance.

Frequently Asked Questions

What is the primary function of a steel shell in hearth bottoms?

The steel shell provides structural support, contains refractory materials, withstands thermal stresses, and prevents heat loss in industrial hearth applications.

How does material selection affect steel shell performance?

Material selection determines temperature resistance, corrosion protection, thermal expansion characteristics, and mechanical strength under cyclic heating conditions.

What maintenance is required for steel hearth plates?

Regular inspection for thermal fatigue cracks, corrosion monitoring, thickness measurement, and refractory interface condition checks every 6-12 months.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Steel Shell/Plate