Alloy Steel

Alloy steel is a term used to describe steels with alloying elements added (in addition to carbon) to improve the mechanical properties of the material. We stock and supply a wide range of High Tensile, Case Hardening and Nitriding grades suitable for a wide range of industry applications.

High Tensile Grades Case Hardening Grades Nitriding Grades

High Tensile Grades

High Tensile Steels are developed with high yield, tensile and fatigue strengths, as well as excellent toughness when subjected to a quenching and tempering (Supplied in the hardened and tempered condition).

Material	Description	Grade	Sizes	Additional Information
Material 4140	Cr Mo steel for applications requiring high tensile strength and toughness values, in particular in medium and large cross sections in the quenched and tempered condition.	AISI 4140 EN 1.7225 EN19A	Round: 10mm – 1000mm Hollow Bar: 45/28 – 200/140mm Hex: 19 – 75mm A/F Square: 28mm – 127mm Flat: 76.2mm x 38.1mm Chrome: 19.05mm – 101.6mm Ground: 12.7mm – 110mm (H9) Peeled & Polished: 19.05mm – 101.6mm (H11). Other sizes available on request.	Datasheet
Material 709M	When compared to other 4140 steels ASSAB 709M has guaranteed superior machinability characteristics in all sizes.	AISI 4140 EN 1.7225 EN19A	Round: 16mm – 250mm Other sizes available on request.	Datasheet
Material 4340	Ni Cr Mo steel for applications requiring high tensile strength and toughness values, particularly in large cross sections in the quenched and tempered condition.	AISI 4340 EN 1.6565 EN24	Round: 17mm – 710mm Other sizes available on request.	Datasheet
Material EN26	21/2% Ni Cr Mo alloy steel with higher C content. Supplied in the hardened and tempered condition. Higher strength than EN25.	EN 1.6745 AS X9940 BS 970 826 M40	Round: 30mm – 300mm Other sizes available on request.	Datasheet
Material 4145H	45% C Cr Mo alloyed steel normally used in oil field applications.	AISI 4145H Mod. API Spec.7	Round: 90mm – 280mm Hollow Bar: 180/57.15 – 254/76.2 Other sizes available on request.	Datasheet

Case Hardening Grades

Case hardening steel is the process of carburizing, in solid liquid or gaseous media, followed by hardening, present a hard, wear-resistant surface layer combining with the softer core and compression stresses involved to increase fatigue strength. Case carbon content and carburized depth can be controlled by varying the composition of the carburizing compound and depend on time and temperature employed.

Material	Description	Grade	Sizes	Additional Information
Material EN36A	Cr Ni case hardening steel for applications requiring excellent wear surface, high toughness and core strength.	AISI E9315 EN 1.5752 EN36A BS 655 M13	Round: 25mm – 305mm Other sizes available on request.	Datasheet
Material E110	E110 is a 1.8% Ni Cr Mo case hardening steel combining core toughness and high case hardness after carburising and quenching.	EN 1.6587 17CrNiMo6	Round: 33mm – 760mm Flat: 600mm x 250mm Other sizes available on request.	Datasheet
Material EN39B	4-1/4% Ni Cr Mo case hardening steel for large and highly stressed applications.	EN 1.6723 AS X9315 BS 835 M 15	POA: Other sizes available on request.	Datasheet
Material 8620	8620 is a balanced low Ni Cr Mo general purpose case hardening steel suitable for comparatively lightly stressed components.	SAE 8620 EN 362	Round: 23mm – 230mm Other sizes available on request.	Datasheet
Material M121	M121 is a remelted nickel chrome molybdenum case hardening steel produced by the PESR (Pressurized ESR) method designed for components with high demand in toughness and core strength.	EN 1.5752 15NiCr13	POA: Other sizes available on request.	–

Nitriding Grades

Steel developed with superior nitriding qualities due to the presence of alloying elements such as molybdenum, vanadium, aluminum or chromium.

Material	Description	Grade	Sizes	Additional Information
Material V820	Cr Ni Al nitriding steel for components with large cross sections, requiring extremely high surface hardness and wear resistance.	EN 1.8550	POA Other sizes available on request.	Datasheet

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