40CrNiMoA SNCM439 Alloy Steel Round Bar Black Surface 160mm Alloy Steel Rod
Forged steel round bar
Grade: 40NiCrMoA
Similar grade: 40NiCrMo8, 817M40, 4340
Chemical compostion:
C: 0.37/0.44; Si: 0.15-0.35; Mn: 0.50/0.80; P: Max 0.025; S: Max 0.035
Cr: 0.60/0.90; Mo: 0.20/0.35; Ni: 1.60/1.90;
Standard: UNI 7845: 1978
Temperature: Hot forging 1100-900
Soft Annealing: HB Max 250
Delivery state: Hot forged +Normalizing/Annealing+Rough Turned+ Quenching+ Tempering, .
Or Only forged of black surface bars.
Size: 90mm~800mm
Length: 4.0m and up(Or fix length according the customer requirement).
Inspecting: UTS according to SEP 1921 C/c, D/d, E/e, A388 or GB/T 6402
Cut both ends
Payment: L/C at sight or T/T
Min. Qty.: 15MT per size.
Delivery: By both negotiation. (By bulk shippment or By Container)
Delivery time: 60 days after L/C.
Other Steel Grade:
Carbon Steel: C45, CK45, C60,
Alloy Steel: ST52-3, ASTM A105, 42CrMo4, S355J2G3, 16MnCr5, 20MnCr5, 34CrNiMo6,
18CrNiMo7-6, 39CrNiMo3, 17CrNiMo6, 21CrMoV511, 56NiCrMoV7, S355J2,
41Cr4, 51CrV4, 41CrAlMo7, 40NiCrMo7,
| Material: |
40crnimoA/sae4340/aisi4340/817m40 |
| Diameter: |
80mm-1200mm (optional) |
| Length: |
1000mm-12000mm Straightness: 3mm/M max(optional) |
| Process: |
EAF + LF + VD + Forged + Heat Treatment (optional) |
| Delivery condition: |
Hot forged +Rough machined (black surface after Q/T)+ Turned (optional) |
| Delivery Time: |
30-45 days |
| MOQ: |
20 tons |
| Heat treatment: |
Normalized / Annealed / Quenched / tempered |
| Technical Data: |
According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing |
| Properties: |
Yield=310 Mpa Minimum; Tensile=600 Mpa minimum; %EI=13min,Surface Hardness=BHN160-220(As your request) |
| Test: |
Ultrasonic test according to SEP 1921-84 Class C/c and D/d (optional) |
| Marking: |
Grade, heat NO. length will be stamped one each bar with required color |
| Payment: |
30% advance by TT; Balance pay before the shipment against shipping documents or irrevocable LC at sight |
| similar steel grade |
40CrNiMoA, AISI4340,39CrNiMO,40NiCRMo22,SNCM439
|
MATERIAL CATEGORY: Japanese Standard grade alloy structural steel
MATERIAL SPECIFICATIONS: JIS G4053 -2003
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.36 ~ 0.43
Si (%): 0.15 ~ 0.35
Mn (％): 0.60 ~ 0.90
P (％)≤: 0.030
S (％)≤: 0.030
Cr (%): 0.60 ~ 1.00
Ni (%): 1.60 ~ 2.00
Mo (%): 0.15 ~ 0.30
Cu (%): ≤ 0.30
HEAT TREATMENT & MECHANICAL PROPERTIES
Quenched 820 ~ 870℃, oil cooled
Tempered 580 ~ 680, rapid cooled
Mechanical property,Tensile strength, ≥ σb/MPa: 980
Mechanical property,Yield strength, ≥ σs/MPa: 885
Mechanical property,Elongation, ≥ δ5 (%): 16
Mechanical property,Reduction of area, ≥ ψ (％): 45
Mechanical property,Impact ≥ Akv J/cm2): 69
Hardness / COND QT.HB: 293 ~ 352
MELTING PROCESS AND APPLICATIONS
The
steels shall be manufactured by melting process EF + ESR, EAF+ LF + VD, EAF+ LF + VD + ESR, IFF + ESR Melted. VIM + ESR can be handled by agreement.
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rods
PRODUCT PROFILE
Round bar (Diameter): 0.50mm to 800mm
Square bar / Flat bar (Width X Thickness): 3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM requirement.
TECHNICAL SALES ASSISTANCE & SERVICE
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