ASTM AISI 4140 42CrMo4 34CrNiMo6 40crnimo Forged Solid Round Bar Steel Rebar High Carbon Steel Bar

• Customization: Available
• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Surface: Milled/Bright/Black
• Length: 1-10m
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

Introduction:  

DIN1.6582/34CrNiMo6 steel Manufacturer and Exporter,supplied with round,square,flat,block,and shaft etc.DIN 1.6582/34CrNiMo6 a heat treatable, low alloy steel which contains  chromium,molybdenum and nickel as strengthening agents as per BS EN 10083-3:2006. It is known for its good strength,toughness, hardenability and capability of developing high strength in the heat treated condition while retaining good fatigue strength,but it is poor in weldability,usually this steel should be hardened and tempered before application.

1.Supply Form & Size & Tolerance

Supply Form	Size(mm)	Process	Tolerance
Round	Φ6-Φ100	Cold Drawn	Bright/Black	Best H11
	Φ16-Φ350	Hot Rolled	Black	-0/+1mm
			Peeled/ground	Best H11
	Φ90-Φ1000	Hot Forged	Black	-0/+5mm
			Rough Turned	-0/+3mm
Flat/Square/Block	Thickness :120-800	Hot Forged	Black	-0/+8mm
	Width:120-1500		Rough Machined	-0/+3mm

Remark:Tolerance can be customized as per requests
2.Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
EN 10083 EN 10250	34CrNiMo6	0.30-0.38	0.50-0.80	≤ 0.025	≤ 0.035	≤ 0.4	1.3-1.7	1.3-1.7	0.15-0.3
	1.6582

3.Physical Property

Density, g/cm3	7.85
Specific heat capacity J/(kg.K)	460
Electric resistivity Ohm.mm2 /m	0.19
Electric conductivity Siemens.m/mm2	5.26
Modulus of elasticity Gpa	100 ºC	200 ºC	300 ºC	400 ºC	500 ºC
	205	195	185	175
Thermal expansion 10^6 m/(m.K)	100 ºC	200 ºC	300 ºC	400 ºC	500 ºC
	11.1	12.1	12.9	13.5	13.9

4. Mechanical Property

Depth mm	25	1/3 radius	1/2 Diameter
R Mpa	930	900	860
Rp 0.2 Mpa	828	750	730
A %	18.6	15.4	12.6
C %	64	60	46
Kv +20 ºC J	/	/	70/74/70
Kv -40 ºC J	110/110/118	48/44/45	25/28/25
Hardness HB	279	271	264

Longitudinal Tesing
Forged round bar Dia 520mm,Quenched at 870 ºC in water,tempered at 630 ºC in air.
5.Forging
DIN 1.6582/34CrNiMo6  forging temperature:850 - 1100°C
6.Heat Treatment

• Normalizing:  850 - 880°C,Cooling in air
• Soft Annealing:650 - 680°C,Cooling in furnace,Max Hardness:248HB
• Full Annealing:830-900°C,Cooling in furnace to 300°C
• Stress relieve:450-650°C ,appr. 50 °C under tempering temperature
• Hardening:830 - 860°C,Quenching in oil
• Tempering:540 - 660°C,Cooling in air

7.Application
DIN 1.6582/34CrNiMo6 steel is used to make tools which requires good plasticity and high strength. It is usually selected to make the big size and important parts, such as heavy machinery axle,turbine shaft blade, high load of transmission parts, fasteners, crank shafts, gears, as well as heavily loaded parts for motor construction etc.