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40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod

Good quality Stainless Steel Plates for sales
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40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod

China 40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod supplier
40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod supplier 40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod supplier

Large Image :  40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod

Product Details:

Place of Origin: CHINA
Brand Name: MITTEL
Certification: SGS ISO
Model Number: SNCM439

Payment & Shipping Terms:

Minimum Order Quantity: 1 TONS
Price: 815 USD/Ton
Packaging Details: Export Packing
Delivery Time: 14 days
Payment Terms: L/C, T/T
Supply Ability: 500 tons
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Detailed Product Description
OD: 8-500mm Length: 1-12m
Surface: Black Type: Round


40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm 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,
Manufacturer: Jiangsu Zhuhong Forging Co., Ltd

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
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
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
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

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.

If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers.


 40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod40CrNiMoA SNCM439 Alloy Steel Round Bar , Black Surface 6mm Steel Rod

Contact Details

Contact Person: Gao Ben

Tel: +8618068357371

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