How much carbon do magnesia-carbon bricks contain?

Carbon content typically ranges from 8% to 18% graphite. Lower-carbon grades (8–10%) are used for the metal line and general lining; higher-carbon grades (14–18%) are used at the slag line where non-wetting behaviour and thermal shock resistance matter most. Metallic antioxidants (Al, Si, B₄C) protect the carbon in service.

Why do MgO-C bricks resist slag so well?

Two reasons: magnesia (MgO) is chemically compatible with the basic (high-CaO, high-FeO) slags of steelmaking, so it is not dissolved like acid or neutral refractories; and the graphite is non-wetting, so slag cannot penetrate the brick pores. Together they give excellent corrosion and penetration resistance in BOF, EAF and ladle slag zones.

How should MgO-C bricks be installed?

They are usually laid dry or with a thin carbon-bonded mortar and very tight joints. Carbon level is matched to duty (higher at the slag line). Oxidising atmosphere should be limited during heat-up to protect the carbon bond; antioxidant-containing grades form a dense protective zone once in service.

Does Shanker Agencies supply MgO-C bricks?

Yes. Shanker Agencies supplies TRL Krosaki magnesia-carbon bricks matched to converter, EAF and ladle slag-line duty, with the carbon level selected for your slag chemistry and campaign target, plus technical support on lining design.

Shaped Refractories 1700°C

MAGNESIA-CARBON (MGO-C) BRICKS

High-carbon basic bricks for BOF, EAF hot spots and ladle slag lines

PRODUCT OVERVIEW

Magnesia-carbon (MgO-C) bricks contain 74–90% MgO with 8–20% graphite and metallic antioxidants (Al, Si, B₄C). The combination resists basic slags, is non-wetting to steel and slag, and survives the severe thermal cycling of converters and arc furnaces. MgO-C is the standard for BOF/converter linings, EAF hot spots and steel ladle slag lines. TRL Krosaki supplies resin-bonded grades from 8% to 18% carbon.

KEY PROPERTIES

MgO Content

74 – 90%

Carbon Content

8 – 20%

Max Service Temp

1700°C+

Bulk Density

2.85 – 3.10 g/cc

Apparent Porosity

3 – 8%

Slag Resistance

Excellent (basic slags)

APPLICATIONS

BOF / converter lining

EAF hot spots & slag line

Steel ladle slag line

Ladle metal line

AOD vessel lining

Converter & EAF taphole

TECHNICAL SPECIFICATIONS

Grade	MgO	Carbon	Porosity	CCS	Max Temp
MgO-C 10%	86-90%	8-10%	4-7%	40 MPa	1700°C
MgO-C 14%	80-84%	12-14%	3-6%	38 MPa	1700°C
MgO-C 18%	76-80%	16-18%	3-5%	35 MPa	1700°C

* Test conditions: IS 1528 (India) / ASTM C-133 / EN 1402. Values are typical — exact data sheets available on request.

AVAILABLE GRADES

MgO-C 10%MgO-C 12%MgO-C 14%MgO-C 18% (slag line)

INSTALLATION NOTES

1
Lay dry or with thin carbon-bonded mortar; keep joints tight (under 1 mm where possible)
2
Match carbon level to duty: lower C for metal line, higher C (16–18%) for slag line
3
Limit oxidising atmosphere during heat-up to protect the carbon bond
4
Antioxidant-containing grades develop a dense protective zone in service

WHY BUY FROM SHANKER AGENCIES

Shanker Agencies supplies TRL Krosaki MgO-C bricks matched to converter, EAF and ladle slag-line duty, with carbon level selected for your slag chemistry and campaign target.

PARTNER BRANDS

TRL Krosaki Calderys

FREQUENTLY ASKED QUESTIONS

MgO-C bricks are the standard lining for basic oxygen furnaces (BOF/converters), electric arc furnace (EAF) hot spots and slag lines, and steel ladle slag and metal lines. The magnesia resists basic steelmaking slags while the graphite makes the brick non-wetting and highly thermal-shock resistant — essential for the severe cycling of converters and arc furnaces.

QUICK INFORMATION

Max Temperature

1700°C

READY TO ORDER OR NEED A SAMPLE?

Our engineers can recommend the exact grade for your application. Sample kits available for trials. No minimum order on standard grades.

Get a Quote Call +91 98999 57888

Technical Data Sheet — Magnesia-Carbon (MgO-C) Bricks

Shanker Agencies Pvt. Ltd. · Typical Values

Typical specification ranges with the applicable test standards. Compiled by Shanker Agencies for magnesia-carbon (mgo-c) bricks supplied across India, GCC & ASEAN.

Typical Chemical Analysis

Property	Typical Value	Test Standard
MgO	74 – 90%	IS 1527 / ASTM C572
Fixed Carbon	8 – 20%	IS 1528 / ASTM C831
Antioxidants (Al/Si/B₄C)	As per grade	—

Typical Physical Properties

Property	Typical Value	Test Standard
Bulk Density	2.85 – 3.10 g/cc	IS 1528 Pt-8
Apparent Porosity	3 – 8%	IS 1528 Pt-8
Cold Crushing Strength	30 – 45 MPa	IS 1528 Pt-4
Max Service Temperature	1700°C+	—

Packaging & Supply: Resin-bonded, tempered. BOF/EAF/ladle shapes to drawing; palletised, moisture-protected.

Disclaimer: Values are typical and compiled by Shanker Agencies Pvt. Ltd. from standard industry data and published specifications of partner manufacturers (CUMI, Calderys, TRL Krosaki, IFGL, Divine Cerawool, Crown Ceramics, Mahakoshal, Saint-Gobain). They are indicative and not a guarantee — confirm the exact grade datasheet before specifying. For a certified datasheet or quotation, contact info@shankeragencies.com or +91 98999 57888.