C45 Round Bar | AISI 1045 | DIN 1.1191 | JIS S45C

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Steel C45 Round Bar is an unalloyed medium carbon steel, which is also a general carbon engineering steel. C45 is a medium strength steel with good machinability and excellent tensile properties. C45 round steel is generally supplied in the black hot rolled or occasionally in the normalised condition, with a typical tensile strength range 570 – 700 Mpa and Brinell hardness range 170 – 210 in either condition. It does not however respond satisfactorily to nitriding due to a lack of suitable alloying elements.
C45 round bar steel is equivalent to EN8 or 080M40. Steel C45 bar or plate is suitable for the manufacture of parts such as gears, bolts, general-purpose axles and shafts, keys and studs.

1. Supply Range of Steel C45 Round Bar
  • C45 Steel Round Bar: diameter 8mm – 3000mm
  • C45 Steel Plate: thickness 10mm – 1500mm  x width 200mm – 3000mm
  • C45 Steel Flat Bar: 200mm – 1000mm
  • Square C45 Steel: 20mm-800mm
  • Hexagon Steel.
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2. Common C45 Steel Specifications
CountryUSABritishJapanAustralia
StandardASTM A29EN 10083-2JIS G4051AS 1442
Grades1045C45/1.1191S45C1045
3. C45 Round Bar Steel Chemical Composition Properties
StandardGradeCMnPSSiNiCr
ASTM A2910450.43-0.500.60-0.900.040.050　-　-　-
EN 10083-2C45/1.11910.42-0.500.50-0.900.030.0350.040.40.4
JIS G4051S45C0.42-0.480.60-0.900.030.0350.15-0.35　-　-
4. Mechanical Properties of C45 Round Bar Steel Material
  • Mechanical Properties in Quenched+Tempered Condition
Diameter d (mm)Thickness t (mm)0.2 % proof stress (N/mm2)Tensile strength (N/mm2)Elongation A5 (%)Reduction Z (%)
<16<8min. 490700-850min. 14min. 35
<17-40<8<=20min. 430650-800min. 16min. 40
<41-100<20<=60min. 370630-780min. 17min. 45
Diameter d (mm)Thickness t (mm)0.2 % proof stress (N/mm2)Tensile strength (N/mm2)Elongation A5(%)
<16<16min. 390min. 620min. 14
<17-100<16<=100min. 305min. 305min. 16
<101-250<100<250min. 275min. 560min. 16
5. Forging of Carbon Steel C45 Round Bar
Hot forming temperature: 850-1200oC.
Pre heat to 750 oC – 800 oC, then continue heating to 1100 oC – 1200 oC maximum, hold until temperature is uniform throughout the section and commence forging immediately. Forging is not workable below 850 oC. Finished forgings could be air cooled.
We are strong on forged steel C45 round bar. Welcome enquiry of C45 steel materials.
6. DIN C45 Round Bar Steel Grade Heat Treatment
Forging or hot rolling:1100 – 850°C
Normalising: 840 – 880°C/air
Soft annealing: 680 – 710°C/furnace
Hardening: 820 – 860°C/water, oil
Tempering: 550 – 660°C/air
7. Hardening of DIN C45 Steel Hardening
Harden from a temperature of 820-860oC followed by water or oil quenching.
Heat to 820 oC – 850 oC hold until temperature is uniform throughout the section, soak for 10 – 15 minutes per 25mm of section, and quench in water or brine. Or,
Heat to 830 oC – 860 oC soak as above and quench in oil.Temper immediately while still hand warm.
Surface hardness for C45 special steel round bar after flame or induction hardning:
  • Steel Name       Steel number          Surface Harndess
  • C45                        1.1191                        min. 55 HRC
8. Application of DIN Carbon Steel C45 Round Bar
DIN C45 round bar steel material and steel plate C45, flats are widely used in all industry for uses which require more strength and wear resistance than the low carbon mild steel.
Quenched and subsequently tempered steel for C45 steel grade round bar, steel plate, flat and square is used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods, screws, forgings, wheel tyres, shafts, sickles, axes, knives, wood working drills, hammers, etc.
Welcome customers to inquiry DIN C45 round bar, CK45/1.1191 steel plate, flat steel for C45 steel price. We are professional supplier and exporter for more than 20 years. We offer you worldwide solution for C45 round bar steel.

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