Below is Specification Sheet for our products.

GRADES OF CARBON & ALLOY STEEL WE SUPPLY

There are four types of steel (carbon steel, alloy steel, stainless steal and tool steel). Steel is an alloy made from iron and carbon. Different amounts of carbon and different alloys create distinctive steels grages. There are three types of carbon steel:

• Low Carbon Steel is the most common with less than 0.3% carbon – Composition of 0.05%-0.25% carbon and up to 0.4% manganese. Also known as mild steel, it is a low-cost material that is easy to shape. While not as hard as higher-carbon steels, carburizing can increase its surface hardness.

• Medium carbon steel contains up to 0.6% carbon, is much stronger than medium and contains manganese as well. Medium high Carbon Steel range from 0.6 to 0.95% carbon, with 0.30%-0.90% manganese. It is very strong and holds shape memory well, making it ideal for springs and wire.

• Very High Carbon Steel - Composition of 0.96%-2.1% carbon. Its high carbon content makes it an extremely strong material. Due to its brittleness, this grade requires special handling.

 

Class Description
Carbon Steel

Carbon steel is an alloy consisting of iron and carbon. Steel can be grouped into four categories: Carbon steels, alloy steels, stainless steels and tool steel. Carbon steel is a steel with carbon content up to 2.1% by weight. Several other elements are allowed in carbon steel, with low maximum percentages. These elements are manganese, with 1.65% maximum, silicon, with a 0.60% maximum, and copper, with a 0.60% maximum. Other elements may be present in quantities too small to affect its properties. As the carbon percentage content rises, steel has the ability to become harder and stronger through heat treating; however, it becomes less ductile. Regardless of the heat treatment, higher carbon content reduces weldability. In carbon steels, the higher carbon content lowers the melting point
Low Carbon Steel

Low Carbon Steel – Composition of 0.05%-0.25% carbon and up to 0.4% manganese. Also known as mild steel, it is a low-cost material that is easy to shape. While not as hard as higher-carbon steels, carburizing can increase its surface hardness

 

Mild Carbon Steel

• Mild Carbon Steel – Composition of 0.29%-0.54% carbon, with 0.60%-1.65% manganese. Medium carbon steel is ductile and strong, with long-wearing properties. Mild steel is malleable, cheap and easy to form due to low carbon and other alloying components content. It has a high amount of iron and ferrite making it magnetic. Surface hardness can be increased through carburizing. It is mainly used as structural steel. Other elements such as sulfur, manganese and phosphate are natural components. While manganese add to the durability of steel, sulfur and phosphorous affect steel's durability and strength negatively.

 

Higher Carbon Steels

High carbon steels have varying carbon content ranging from 0.3 to 1.7% by weight. Theses steels undergo heat treatments to achieve varying mechanical properties, such as ductility, hardness or impact resistance. Treatment can also change chemical properties by removing undesirable elements, while adding in suitable elements to achieve desired grades.

A36 (38W)

Mild Steel

This is the most popular ASTM structural steel specification for carbon steel shapes, plates and bars for welded and bolted construction of bridges, buildings and general purposes. It is not recommended where low temperature toughness is important. It has excellent welding propeties and is suitable for drilling, punching grinding and other machining and fabrication processes. it also bends easily.

Mechanical Properties: Tensile 58 to 80 KSI; Yield - 36 KSI min.; Elongation - % - 20% at 50mm break, and 23% at 200 mm break.

44W/44WT(300WT)

Standard weldable steel normally specified in building construction, it is not recommended where low temperature toughness is important. 44W can be flame cut, formed, drilled welded and machined by all normal means. When "T" is added to the grade, it will come with Charpy notch performance test results.

Mechanical Properties: Tensile 65 to 85 KSI; Yield - 44 KSI min.; Elongation - % - 20% at 50mm break, and 23% at 200 mm break.

50W (350W)

Used normally for HSS sections, where specific strength requirements are required. Suitable for general welded construction where notch toughness at low temperatures is not a design requirement. This grade comes in category ranges from CAT1 to CAT5 for Charpy performance test.

Mechanical Properties: Tensile 65 to 95 KSI; Yield - 50 KSI min.; Elongation - % - 19% at 50mm break, and 22% at 200 mm break.

50A (350A)

50AT (350AT)

These are atmospheric corrosion resistant steels normally used in bridge constructions for beams and columns. Type A represents high-strength low-alloy steel with a composition to provide good atmospheric corrosion resistance and good weldability at high-strength levels. Used for both painted and unpainted applications. Steel of this type meet specified strength requirements. Type AT meets Charpy V-Notch impact requirements. The category of steel required must be specified.

Mechanical Properties: Tensile 65 to 95 KSI; Yield - 50 KSI min.; Elongation - % - 19% at 50mm break, and 22% at 200 mm break.

ASTM A572-GR42/50/55/60/65

This is a high-strength low-alloy steel Intended for the construction of bridges, buildings and other structures. High-strength low-alloy.

Mechanical Properties: Tensile 65 to 95 KSI; Yield - 50 KSI min.; Elongation - % - 19% at 50mm break, and 22% at 200 mm break.

Grade Yield Point (KSI) Tensile Strength (KSI) Elongation &% (min 8")
42 42 60 20
50 50 65 18
60 60 75 16
65 65 80 15

 

ASTM A516 Grade 70 /
ASME SA516 Grade 70

Used in the construction of boilers and pressure vessels used in.
These are structural steels with a min yield strength of 100/130/140/160 respectively, intended for applications where its high strength permits weight savings to be made. The plate has very good cold bending properties with very good weldability. Fulfills the requirements of ASTM A514, for thickness up to 2 ½”. Guaranteed impact toughness at -40F (-40C).

QT-100 (700QT)

Quench and Tempered Steel is heat-treated to develop yield strength. This is a cost effective choice for applications which require high strength, improved notch toughness, superior weldability and good forming ability, as well as good resistance to brittle fracture and is suitable for structures where notch toughness at low temperatures are a design requirement. This meets specific strength and Charpy V-notch requirements. The category of steel required must be specified.

QT360 / QT400

Quench and Tempered Steel that is heat-treated through hardness for resistance to abrasion. Weldable for structural sound joints and can be formed with care.

400F

Used in the original fabrication and repair of heavy equipment subject to severe abrasive wear. Common applications would relate to mining, aggregate, pulp and paper and construction markets.