Hot Rolled · Cold Finished · Custom Sizes
Saf Steel Group supplies steel round bars in both hot rolled and cold finished conditions, across a wide range of carbon steels, case hardening steels and quenched & tempered (QT) steel grades.
Diameter range: 6 mm – 330 mm
Services: Cut-to-length supply, flexible sizing and customized dimensions to meet specific production and machining requirements.
Consistent quality, dimensional flexibility and dependable delivery — engineered to support modern manufacturing.
CARBON STEELS
AISI 1010 · AISI 1020 · AISI 1030
Low Carbon & General Engineering Steels
Common EN references:
AISI 1010 → C10E (1.1121)
AISI 1020 → C22E (1.1151)
AISI 1030 → C30E (1.1170)
AISI 1010, 1020, and 1030 are low to medium carbon steel grades widely used in general engineering applications requiring good machinability, reliable toughness, and stable mechanical performance.
With increasing carbon content, these grades provide progressively higher strength while maintaining good workability and suitability for machining and heat treatment.
They are typically supplied in hot rolled or forged bar forms and used for round bars, flat products, and general machinery components.
AISI 1040 · AISI 1045 · AISI 1050
Medium Carbon Steels – Higher Strength Grades
Common EN references:
AISI 1040 → C40E (1.1186)
AISI 1045 → C45E (1.1191)
AISI 1050 → C50E (1.1206)
AISI 1040, 1045, and 1050 are medium carbon steel grades offering increased strength and wear resistance compared to low carbon steels, while maintaining good machinability and heat treatment capability.
With rising carbon content, these grades deliver higher hardness potential and improved mechanical strength, making them suitable for more demanding engineering applications.
They are typically supplied in hot rolled or forged bar forms and used for round bars, flat products, and general machinery components..
AISI 1060 (C60) · AISI 1070 (C70) · AISI 1090
High Carbon Steels – Wear & Strength Grades
Common EN references:
AISI 1060 → C60E (1.1221)
AISI 1070 → C70E (1.1526)
AISI 1090 → C90E (1.1640)
AISI 1060, 1070, and 1090 are high carbon steel grades designed for applications requiring high hardness, excellent wear resistance, and increased mechanical strength after heat treatment.
As carbon content increases, these grades provide higher hardness potential and improved resistance to wear and fatigue. They are well suited for demanding applications where durability and performance are critical.
These steels are typically supplied in hot rolled or forged bar forms and used for round bars, flat products, and heavy-duty machinery and wear components.
ST37 · S235
ST37 and S235 are low-strength non-alloy structural steel grades widely used for steel round bars and general construction applications. They offer excellent weldability, good formability, and ease of fabrication, making them ideal for light to medium-duty structural use.
These grades are typically supplied in hot rolled form and commonly used in structural components, frames, basic machine parts, and construction projects, where simple processing and cost efficiency are required.
S355 (S355J0 – 1.0553 · S355J2 – 1.0570)
EN 10025-2 Structural Steels S355J0 and S355J2 are non-alloy steel grades widely used in general engineering and industrial applications requiring high strength, good weldability, and reliable toughness.
With a minimum yield strength of 355 MPa, these steels provide dependable mechanical performance for load-bearing and machined components.
S355J0 offers impact resistance at 0°C, while S355J2 provides enhanced toughness at –20°C, making it suitable for more demanding service conditions.
These grades are typically supplied in hot rolled condition and are commonly used for plates, flat products, and general machinery and engineering applications.
ST60 · ST70
ST60 and ST70 are high-strength non-alloy structural steel grades used for steel round bars in demanding mechanical and structural applications. These grades offer higher tensile strength, good toughness, and reliable performance under increased load conditions.
Compared to lower-strength structural steels, ST60 and ST70 are suitable for applications requiring improved load-bearing capacity and durability. They are typically supplied in hot rolled form and used in shafts, heavy-duty machine parts, structural components, and industrial projects..
QUENCHED & TEMPERED (Q&T)
38Cr4 (AISI 5135) · 41Cr4 (AISI 5140)
EN Material Numbers: 1.7035 · 1.7039
38Cr4 (AISI 5135) and 41Cr4 (AISI 5140) are chromium alloy heat treatable steel grades commonly used as steel round bars in mechanical engineering applications. Both grades offer good strength, toughness, and wear resistance after quenching and tempering.
41Cr4 contains slightly higher carbon content, providing marginally higher strength compared to 38Cr4, while both grades are considered closely related and often interchangeable depending on design requirements. They are typically supplied in hot rolled or heat treated condition and used in shafts, gears, axles, pins, and machine components.
AISI 4130 (34CrMo4) · AISI 4140 (42CrMo4)
EN Material No: 1.7225
AISI 4130 and AISI 4140 (42CrMo4) are chromium-molybdenum heat treatable steel grades widely used as steel round bars in demanding mechanical applications. These grades provide high strength, good toughness, and excellent hardenability after quenching and tempering.
AISI 4130 offers lower carbon content and better weldability, while AISI 4140 (42CrMo4) provides higher strength and wear resistance, making them suitable for different load requirements. They are typically supplied in hot rolled or heat treated condition and used in shafts, gears, axles, bolts, pins, and heavy-duty machine components.
AISI 4150 (50CrMo4) · AISI 8640 (39NiCrMo3)
AISI 4150 and AISI 8640 alloy steel round bars are high-strength heat treatable alloy steel grades used in demanding mechanical and industrial applications. They offer high tensile strength, good fatigue resistance, and reliable performance after quenching and tempering.
AISI 4150 provides higher hardness, while AISI 8640 offers improved toughness due to nickel alloying. These steels are commonly supplied in hot rolled or quenched and tempered condition and used in shafts, gears, axles, and heavy-duty machine components.
34CrNiMo6 (AISI 4340) · 36CrNiMo4
High Strength Quenched & Tempered Alloy Steels
34CrNiMo6 (AISI 4340) and 36CrNiMo4 are nickel-chromium-molybdenum alloy steel grades developed for demanding mechanical applications requiring high strength, excellent toughness, and superior fatigue resistance.
34CrNiMo6 offers outstanding strength and toughness after quenching and tempering, making it suitable for components subjected to high dynamic and impact loads.
36CrNiMo4 provides a balanced combination of strength, toughness, and good machinability, offering reliable performance for heavy-duty industrial applications.
These grades are commonly supplied in forged or quenched and tempered bar forms and are widely used for shafts, gears, axles, pins, and critical machinery components where long service life and reliability are essential.
EN Material Numbers: 34CrNiMo6 — 1.6582 · 36CrNiMo4— 1.6511
30CrNiMo8 QT · 36CrNiMo16
High-Performance Alloy Steels for Heavy-Duty Applications
30CrNiMo8 QT and 36CrNiMo16 are high-performance nickel-chromium-molybdenum alloy steels developed for demanding mechanical and industrial applications requiring very high strength, excellent toughness, and superior fatigue resistance.
Supplied primarily in quenched and tempered (QT) condition, these grades provide stable mechanical properties, good hardenability, and reliable performance under heavy and dynamic loading.
30CrNiMo8 QT offers an excellent balance of strength and toughness, while 36CrNiMo16 delivers higher core strength and load-bearing capacity for the most demanding mechanical requirements.
These steels are commonly supplied as steel round bars and used in shafts, gears, axles, and heavy-duty machine parts where long service life and reliability are critical.
EN Material Numbers: 30CrNiMo8 QT — 1.6580 · 36CrNiMo16 — 1.6773
CARBURIZING STEELS
C15 · Ck15
C15 and CK15 are low-carbon steel grades commonly used as carburizing (case hardening) steels for mechanical applications. These grades are designed to achieve a hard, wear-resistant surface while maintaining a tough core after carburizing and subsequent heat treatment.
CK15 offers tighter chemical composition control compared to C15, making it suitable for applications requiring more consistent mechanical properties. Both grades are typically supplied as steel round bars and used in gears, shafts, pins, bushings, and lightly loaded machine components.
16MnCr5 · 20MnCr5
16MnCr5 and 20MnCr5 are widely used carburizing (case hardening) alloy steels designed for components requiring a hard, wear-resistant surface combined with a tough and durable core. These grades provide excellent performance after carburizing and heat treatment.
20MnCr5 offers slightly higher carbon content, enabling increased surface hardness compared to 16MnCr5, while both grades deliver good fatigue strength and dimensional stability. They are commonly supplied as steel round bars and used in gears, shafts, pinions, bushings, and transmission components.
25CrMo4 (AISI 4120) · 21NiCrMo2 (AISI 8620)
25CrMo4 (AISI 4120) and 21NiCrMo2 (AISI 8620) are alloy steels commonly used in carburizing (case hardening) applications where a hard, wear-resistant surface and a tough core are required. Both grades offer reliable mechanical performance after carburizing and heat treatment.
25CrMo4 / AISI 4120 provides good strength and wear resistance, while 21NiCrMo2 / AISI 8620 benefits from nickel alloying, offering improved toughness and fatigue resistance. These steels are typically supplied as steel round bars and used in gears, shafts, pinions, bushings, and transmission components.
15NiCr6 (AISI 3115) ·· 14NiCr14 (AISI 3315) · 14NiCr18 (AISI 3415)
15NiCr6 (AISI 3115), 14NiCr14 (AISI 3315) and 14NiCr18 (AISI 3415) are nickel-chromium alloy steels used in carburizing (case hardening) applications requiring a hard, wear-resistant surface combined with a tough core.
These grades offer increasing toughness and hardenability with higher nickel content. They are commonly supplied as steel round bars and used in gears, shafts, pinions, bushings, and transmission components where durability and fatigue resistance are critical
17CrNiMo6 · 18NiCrMo5 · 18CrNiMo7-6
17CrNiMo6, 18NiCrMo5 and 18CrNiMo7-6 are high-performance nickel-chromium-molybdenum alloy steels used in carburizing (case hardening) applications where a hard, wear-resistant surface and a tough, fatigue-resistant core are required.
These grades offer excellent hardenability and increasing load-bearing capacity, making them suitable for gears, shafts, pinions, transmission components, and heavy-duty mechanical parts. They are commonly supplied as steel round bars and selected for demanding industrial and power transmission applications.
EN Material Numbers: 17CrNiMo6 – 1.6587 · 18NiCrMo5 – 1.6317 ·
18CrNiMo7-6 – 1.6588
FREE-CUTTING STEELS
DIN 9 S20 · DIN 9 SMn28 · DIN 9 SMn36 · DIN 9 SMnPb36 · SAE 1117
DIN 9 S20, SMn28, SMn36, SMnPb36 and SAE 1117 are free-cutting (free-machining) steel grades developed for high-speed and high-volume machining applications. These steels are alloyed with elements such as sulfur and lead to improve chip breaking, tool life, and surface finish.
SMn28 and SMn36 offer enhanced machinability, while SMnPb36 provides superior cutting performance due to lead addition. SAE 1117 is widely used as an equivalent free-machining grade in international applications. These steels are commonly supplied as steel round bars and used in precision machined parts, fittings, fasteners, bushings, and mass-production components.
DIN 9 SMnPb36 · DIN 35 SPb20
DIN 9 SMnPb36 and DIN 35 SPb20 are lead-alloyed free-cutting steel grades developed for applications requiring excellent machinability and high production efficiency. The addition of lead significantly improves chip breakability, surface finish, and tool life during machining.
SMnPb36 offers higher strength with superior cutting performance, while SPb20 is optimized for precision machining of small and complex components. These steels are commonly supplied as steel round bars and used in automotive parts, fittings, fasteners, bushings, and high-volume machined components.
DIN 10 S20 · DIN 35 S20 · DIN 60 S20 · SAE 1137
DIN 10 S20, DIN 35 S20, DIN 60 S20 and SAE 1137 are free-cutting steel grades designed for efficient machining and consistent production quality. These steels provide good chip formation, stable cutting performance, and reliable surface finish in high-speed machining operations.
These grades are typically supplied as steel round bars and widely used in precision-machined components, fittings, fasteners, bushings, and automotive and industrial parts, where productivity and dimensional accuracy are essential.
BEARING STEEL
100Cr6 (AISI 52100)
100Cr6 (AISI 52100) is a high carbon chromium steel used in bearing and wear-resistant applications requiring high hardness and fatigue strength. Supplied in hot rolled condition, it offers reliable performance and good machinability before heat treatment.
This grade is commonly used for bearing parts, shafts, rollers, and mechanical components subjected to repeated loading.
At SAF Steel Group, hot rolled 100Cr6 bars are supplied with EN 10204 3.1 certification.
SPRING STEEL
55Si7 · 60SiCr7 · SAE 5160 · SAE 9260
55Si7, 60SiCr7, SAE 5160 and SAE 9260 are widely used silicon-based spring steel grades designed for applications requiring high elasticity, excellent fatigue resistance, and reliable strength. These steels perform exceptionally well after heat treatment, maintaining their spring properties under repeated loading.
55Si7 and SAE 9260 offer high elasticity, while 60SiCr7 and SAE 5160 provide improved strength and wear resistance due to chromium addition. These grades are commonly supplied in round bar or flat form and used in automotive suspension springs, coil springs, leaf springs, and heavy-duty industrial spring applications.
SPRING STEEL
51CrV4 · 52CrMoV4 · 50CrV4
51CrV4, 52CrMoV4, and 50CrV4 are alloy spring steel grades designed for applications requiring high strength, excellent fatigue resistance, and superior elasticity under repeated and dynamic loading conditions.
The addition of chromium, vanadium, and molybdenum enhances hardenability, wear resistance, and toughness, providing reliable performance after heat treatment. These grades are commonly supplied in hot rolled or heat-treated condition and used in heavy-duty springs, suspension systems, and demanding industrial applications.
At SAF Steel Group, alloy spring steels are supplied with controlled quality and EN 10204 3.1 certification, meeting the requirements of performance-driven spring applications.
COLD HEADING STEELS
AISI 1006 · AISI 1008 · St37-2 (S235JR)
AISI 1006, AISI 1008, and St37-2 are widely used low carbon steel grades suitable for cold forming and cold heading applications where excellent ductility, formability, and surface quality are required.
AISI 1006 and AISI 1008 are specifically designed for cold upsetting and cold heading processes, offering superior deformation capability without cracking. These grades are commonly used in the production of bolts, screws, rivets, fasteners, and automotive components.
St37-2 (S235JR), while primarily a structural steel, is also used in light cold forming applications where moderate strength and good workability are required.
These steels are commonly supplied in wire rod, round bar, or coil form, ensuring consistent performance in high-volume forming operations