Carbon steel and Manganese Steel for Machine Structural use

Mn. Steel has high strength and has been applied to critical circumstances in which the material would undergo impact, squeezing and wear coming from high stress and abrasives. It has been widely used to produce the lining of Ball Mill, hammer of Hammer Crusher, jaw plate of Jaw Crusher, the concave of Conic Crusher, crushing concave, bucket and tooth of excavator, turnout of rail, tracks of tractor and tank, which are made of anti-impact and wear-resistant cast. In addition, it can be applied to bullet-proof steel plate and safe deposit box as well.

Product Applications

Mn. Steel can be simply used to produce low-cost products with high strength such as: farm tools (hoe, axes), bolts & nuts(large), steel rack for bikes and motorcycle.

S30C (Drill die fixing plate)

Japanese JISG4051-79(94) standard steel grade, high-quality

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S30C (Drill die fixing plate)

Japanese JISG4051-79(94) standard steel grade, high-quality carbon steel.

The steel is a fully static steel manufactured by the electric furnace and open-hearth pure oxygen converter steelmaking method.

It has extremely high wear resistance and toughness. The steel has a uniform metallographic structure and excellent processing properties.

The quenching temperature is 850～900℃, water cooling,
and the tempering temperature is 550～650℃, quenching.

Yield strength＞333MPa
Tensile strength＞539MPa
Elongation δ5＞23%
Shrinkage ф＞57%
Impact toughness value αku＞108J/cm2
Hardness 152～212HB.

It is suitable for the backing plate of various cold work molds,
the fixed plate of drilling mold... etc.

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S35C(Connecting Rod)

AISI/SAE Code: 1035 JIS S35C is a high quality carbon struc

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S35C(Connecting Rod)

AISI/SAE Code: 1035
JIS S35C is a high quality carbon structural steel with good plasticity and suitable strength.

It has good workability and good weldability and is mostly used in the normalized and tempered condition.

JIS S35C steel is widely used in the manufacture of various forgings and hot pressed parts, cold drawn and top forged steel, seamless steel pipes, and parts in machinery manufacturing, such as crankshafts, shafts, rotating shafts, and other parts.
For example, crankshafts, shafts, pins, levers, connecting rods, beams, sleeves, wheels, washers, screws, nuts, etc.

Tensile strength σb (MPa): ≥ 530 (54)
Yield strength σs (MPa): ≥315(32)
Elongation δ5 (%): ≥20
Fracture shrinkage ψ (%): ≥ 45
Impact power Akv (J): ≥ 55
Impact toughness value αkv (J/cm2): ≥ 69 (7)
Hardness: not heat treated ≤ 197HB
Heat treatment specification: Normalizing: 870 ℃, quenching: 850 ℃, tempering: 600 ℃.
Metallographic organization: ferrite + pearlite.

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S40C (Crankshaft mandrel)

S40c is an alloy with high strength, good machinability, med

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S40C (Crankshaft mandrel)

S40c is an alloy with high strength, good machinability, medium cold deformation ability, poor weldability, no tempering brittleness, low hardenability and easy to generate water quenching cracks.

Most of them are used in quenching and tempering or normalizing state. Their comprehensive properties are similar. After surface quenching, they can be used to manufacture parts bearing large stress.

It is suitable for manufacturing crankshaft mandrel, transmission shaft, piston rod, connecting rod, sprocket, gear, etc. when making weldments, it needs to be preheated first and cooled slowly after welding.

Tensile strength σ b (MPa)：≥570
Yield strength σ s (MPa)：≥335
Recommended heat treatment: normalizing:
860 ℃, quenching: 840 ℃, tempering: 600 ℃

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45Mn (Universal joint)

45MN has good comprehensive and mechanical properties after

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45Mn (Universal joint)

45MN has good comprehensive and mechanical properties after quenching and tempering. The hardenability, strength and toughness are higher than those of S45C.

Good cold deformation in machinability, low plasticity, poor weldability and tempering hardenability.

Application: rotating shaft, spindle, universal joint, crankshaft, connecting rod, gear, clutch, bolt, nut, etc.

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SMn420 (Diesel engine sleeve)

DIN 20Mn5, It has medium strength, high plasticity during co

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SMn420 (Diesel engine sleeve)

DIN 20Mn5, It has medium strength, high plasticity during cold deformation, good low temperature performance, and high hardenability compared to carbon steels with corresponding carbon content.

It is generally used for small cross-sectional parts and is comparable to 20Cr steel.

It can be used as carburized pinion, small shaft, steel sleeve, piston pin, diesel engine sleeve, automobile steering roller shaft, valve top bar, etc.

It can also be used as tempered steel, such as cold photo bolts or tempered parts with larger cross-section.

Tensile strength σb (MPa): ≥785(80)
Yield strength σs (MPa): ≥590(60)
Elongation δ5 (%): ≥10
Impact power Akv (J): ≥47
Impact toughness value αkv (J/cm2) : ≥ 59 (6)
Hardness: ≤187HB

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SMn433

This steel is mostly used in a quenched condition and is mos

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SMn433

This steel is mostly used in a quenched condition and is mostly used as stamping parts (4-11 mm steel plates) in automobile, tractor and general machinery manufacturing to make beams and crossbeams of automobiles, gearbox gears, shafts, cold photo bolts and quenched parts of larger cross-section.

This steel can also be used as carburizing steel to make carburized parts with higher core strength requirements, such as rear axles and journals of mining cranes.

It is used for mechanical parts with higher stress such as connecting rods, mandrels, crankshafts, half-shafts, steering rods, wind turbine parts, and various important bolts with a diameter of less than 15mm.

It can replace 40Cr steel when making small cross-sectional parts (diameter less than 20MM).

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45Mn2 (Friction plate)

(JIS smn443) this steel is a medium carbon quenched and temp

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45Mn2 (Friction plate)

(JIS smn443) this steel is a medium carbon quenched and tempered steel with high strength, wear resistance and hardenability. The critical hardenability diameter in oil is 10 ~ 25mm and in water is 22 ~ 45.
After quenching and tempering, it has good comprehensive mechanical properties and good machinability; However, it has the disadvantages of overheating sensitivity and temper brittleness during heat treatment, water quenching is easy to crack, sensitive to white spots, low weldability and cold deformation plasticity.
It is used for manufacturing universal joint shaft, axle, connecting rod cap, friction disc, worm, gear, gear shaft, tram and steam locomotive shaft, carriage shaft, heavy load frame, bolts and nuts in cold drawing state, etc

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1050 (Airborne Soldier Knife)

AISI 1050 (UNS G10500) is a high-carbon cold-rolled steel co

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1050 (Airborne Soldier Knife)

AISI 1050 (UNS G10500) is a high-carbon cold-rolled steel containing approximately 0.50% carbon, with good strength, toughness and wear resistance.

This grade of steel is used in the manufacture of inserts, brackets, brake discs, clamps, clutches, springs, washers and gears.

Among the various steels used for blades, 1050 steel performs very well, with excellent durability, edge retention, and resistance to staining and rusting, making it the preferred choice for airborne soldier knives.

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S45C (Pipe Joint)

S45C steel is an all-static steel manufactured by electric,

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S45C (Pipe Joint)

S45C steel is an all-static steel manufactured by electric, blast furnace or pure oxygen converter steelmaking method.

The steel has a carbon content of 0.4% or more and has excellent wear resistance, but reduced ductility and is susceptible to deformation and cracking during quenching, so heat treatment is extremely important and must be cooled sharply after tempering to avoid temper brittleness. By spheroidizing the steel, the cutting properties of this carbon steel can be improved.

It is a high strength medium carbon steel, which is generally used in normalized condition due to poor hardenability, and is tempered when higher mechanical properties are required.

Cold deformation plasticity is medium, annealed and normalized machinability is better than tempered. Used in the manufacture of parts with higher strength requirements.

Such as: gears, shafts, piston pins, etc. and mechanical processing parts, forgings, stamping parts and bolts, nuts, pipe joints that are not subject to large forces.

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SMn438 (Crankshaft)

SMn438 alloyed structural steel has high strength, plasticit

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SMn438 (Crankshaft)

SMn438 alloyed structural steel has high strength, plasticity and wear resistance, but not high cold deformation plasticity and poor weldability.
Used for tempered parts working under heavy loads, such as shafts, half shafts, crankshafts, axles, screws, worm shafts, piston rods, steering rods, levers, connecting rods, loaded bolts, screws, reinforcing rings, springs, etc.
It is equivalent to 40Cr steel when used for important parts with small cross-sections under 40mm in diameter.

Translated with www.DeepL.com/Translator (free version)

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SMn443 (Friction plate)

The steel is medium carbon quenched and tempered steel with

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SMn443 (Friction plate)

The steel is medium carbon quenched and tempered steel with high strength, wear resistance and hardenability. The critical hardenability diameter in oil is 10 ~ 25mm and in water is 22 ~ 45. After quenching and tempering, it has good comprehensive mechanical properties and good machinability; However, it has the disadvantages of overheating sensitivity and temper brittleness during heat treatment, water quenching is easy to crack, sensitive to white spots, low weldability and cold deformation plasticity.
This kind of steel is generally used in quenched and tempered state, and can also be used in normalized state. It is suitable for manufacturing parts working under high stress and wear conditions. When the workpiece diameter is less than 60mm, its performance is equivalent to that of scr440 steel. In the manufacture of automobile cultivator and ordinary machinery, it is used to manufacture universal joint shaft, axle, connecting rod cover, friction disc, worm, gear, gear shaft, tram and steam locomotive shaft, carriage shaft, heavy load frame, bolts and nuts in cold drawing state, etc.

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Steel data

Standard Code Spec No. Material No. Mark
CNS 3828 S30C
JIS G4051 S30C
AISI 1030
CNS 3828 S35C
JIS G4051 S35C
CNS 3828 S45C
GB 699 45Mn
JIS G4051 S45C
AISI 1045
AISI 1050
GB 3077 15Mn2
GB 3077 45Mn2
(C)% (Si)% (Mn)% (P)% (S)% (Ni)% (Cr)% (Cu)% Ni+Cr Remarks
0.27~0.33 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.27~0.33 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.28~0.34 0.6~0.9 ≦ 0.04 ≦ 0.05
0.32~0.38 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.32~0.38 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.42~0.48 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.42~0.5 0.17~0.37 0.7~1 ≦ 0.035 ≦ 0.035 ≦ 0.25 ≦ 0.25 ≦ 0.25
0.42~0.48 0.15~0.35 0.6~0.9 ≦ 0.03 ≦ 0.035 ≦ 0.2 ≦ 0.2 ≦ 0.3 ≦ 0.35
0.43~0.5 0.6~0.9 ≦ 0.04 ≦ 0.05 Si(%)協定
0.48~0.55 0.6~0.9 ≦ 0.04 ≦ 0.05
0.12~0.19 0.17~0.37 0.7~1 ≦ 0.035 ≦ 0.035 ≦ 0.25 ≦ 0.25 ≦ 0.25
0.42~0.49 0.17~0.37 1.4~1.8 ≦ 0.035 ≦ 0.035