Description
Jiangsu Liangyi is professional manufacturer of 1.2738,40CrMnNiMo8-6-4,40CrMnNiMo864,40CrMnNiMo8.6.4 open die forging parts and seamless rolled steel forged rings from china
Following is the shape of 1.2738,40CrMnNiMo8-6-4,40CrMnNiMo864,40CrMnNiMo8.6.4 forging steel material that we could do is:40CrMnNiMo8.6.4 Forged Steel round bars square bars Flat bars Rectangles Bars Rods,40CrMnNiMo8.6.4 Forged forging steel rings seamless rolled rings,1.2738 Forged Forging Steel Hubs housing shell Sleeves Bushes Bushing Cases Hollow Bars,40CrMnNiMo8.6.4 forging forged steel shafts,gear,pinion shafts,spindles,gear wheel,1.2738 Forged Forging Steel Discs Disks Blocks plates,40CrMnNiMo8.6.4 Forged Forging Steel Pipe Tubes Tubings Piping Shells Casings Case barrels Housings.
1.2738 is s an alloyed, tempered tool steel and is characterized by a high level of hardenability through larger wall thickness cross-sections (over 400 mm) and good hardenability up to over 52 HRC. The small amount of alloy of the elements molybdenum and nickel improves the temper resistance and reduces the sensitivity to temper embrittlement.
1.2738 is used for components in plastic mold construction and is also frequently used in the automotive supply industry and in plant construction. The material 1.2738 is used for large molds and zinc die-casting molds
For melting 1.2738 forging steel bars, we have following melting equipment
60 t Electric Arc Furnace (EAF) / Power 40 MVA
2 Ladle Furnace (LF)
2 Tank Degassing VD - VOD type
Pits for bottom pouring
ESR Plant (max weight 32 t)
Chemical Composition of 40CrMnNiMo864 forged shafts
C 0.35 - 0.45
Si 0.2 - 0.4
Mn 1.3 - 1.6
Ni 0.9 - 1.2
P max 0.03
S max 0.03
Cr 1.8 - 2.1
Mo 0.15 - 0.25
Following is heat treatment way of 1.2738 forged bars
Soft annealing: The steel 1.2738 is soft annealed at 710°C - 740°C. This is followed by slow (oven) cooling. A maximum annealing hardness of 235 HB (21.7 HRC / 247HV) is achieved.
Hardening: The hardening process takes place at 840°C - 870°C and is carried out in oil / polymer.
Tempering: The material number 1.2738 is tempered at 500°C - 650°C with subsequent cooling in the air.
Relaxation: Due to changes in the residual stress state due to the mechanical processing, a subsequent stress relieving in the temperature range of 500-550 ° C is recommended.
Mechanical Properties of the Raw Material of 40CrMnNiMo8.6.4 forging shafts
Hardness of steel 1.2738 in hardened and tempered condition, at various tempering temperatures:
Tempering temperature: 100 °C - 51.5 HRC
Tempering temperature: 200 °C - 50.2 HRC
Tempering temperature: 300 °C - 48 HRC
Tempering temperature: 400 °C - 46.2 HRC
Tempering temperature: 500 °C - 43 HRC
Tempering temperature: 600 °C - 39 HRC Tempering temperature: 700 °C - 29 HRC
All 1.2738 forged flat bars are ultrasonically tested, according to ASTM A578 - S9 specification.
Grain size Uniform 7/8 grain size according to ASTM E 112 method.
FOllowing is inspection standard of 40CrMnNiMo8.6.4 Forged steel material
ASTM E 8 Tension Testing of Metallic Materials
ASTM E 8M Tension Testing of Metallic Materials (Metric)
ASTM E 10 Brinell Hardness of Metallic Materials
ASTME 139 Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
ASTM E 292 Conducting Time-for-Rupture Notch Tension Tests of Materials
ALl our finished producrtion of 1.2738,40CrMnNiMo8-6-4 forged round bars should have inspection certificate as per 3.1B of EN 10204 shall be provided to clients in triplicate;this certificate must contain the following dala:
(a)Material code no and P.O.number
(b)Material designation
(c)Heat no.,heat analysis and melting methods
(d)Table with the single results for determination pf the purity grade at microsections and value of purity grade K1
(e)Mechanical test results including hardness range
(f)Complete information on all heat treatments performed
(g)Results of NDT tests performed
(h)Confimation of material identification check
(i)Confirmation of dimensional and visual check
Welcome your inquiry of 1.2738,40CrMnNiMo8-6-4,40CrMnNiMo864,40CrMnNiMo8.6.4 forging parts
