Alloy Round Bar Dia 55-400 Mm Mat DIN 1.8519 31CrMoV9 3-6 Meters Tool Mold Steel
Brand Name:TSING SHAN
Certification:ISO SGS MTC
Model Number:DIN 1.8519 31CrMoV9
Minimum Order Quantity:100KGS
Delivery Time:7 Days
Payment Terms:L/C, T/T
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Wuxi Jiangsu China
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Product Details
Alloy Round Bar Dia 55-400 mm Mat DIN 1.8519 31CrMoV9 3-6 Meters Tool Mold Steel
About products
31CrMoV9 is a nitriding steel which has at least
2.3%Cr,0.15%Mo,0.1%V as strengthening alloy elements.
Due to its high wear resistance,it is mainly used in the automotive
industry and general components mechanical engineering.
30CrMoV9 is difficult to weld and therefore should not be used in
weld constructions.It can attain surface hardness of 800 HV
after nitriding.31CrMov9 is directly involved the nitriding steel
30CrMoV9 (DIN1.7707).
Chemical Composition(%)
| C | Mn | P | S | Si | V | Cr | Mo |
| 0.27-0.34 | 0.40-0.70 | ≤ 0.025 | ≤ 0.035 | ≤ 0.4 | 0.1-0.2 | 2.3-2.7 | 0.15-0.25 |
Physical Property
Density ,g/cm3: 7.85
Specific heat capacity, J/(kg.K):460
Thermal conductivity ,W/(m.K):42
Electric resistivity,Ohm.mm2 /m:0.19
Modulus of elasticity ,Gpa: 210
Mechanical Property
| Diameter d mm | 16-40 | 40-100 | 100-160 | 160-250 |
| Yield Strength Mpa | ≥900 | ≥800 | ≥700 | ≥650 |
| Tensile Strength Mpa | 1100-1300 | 1000-1200 | 900-1100 | 850-1050 |
| Elongation, % | ≥9 | ≥10 | ≥11 | ≥12 |
| impact,J | ≥25 | ≥30 | ≥35 | ≥40 |
| Hardness,HB | 331-380 | 298-359 | 271-331 | 253-319 |
Heat the temperature between 1050ºC-1150ºC,hold suitable time for the steel to be thoroughly heated.Reheat the steel once
temperature below 850°C. Crack is easily occured when improper cooling way after forged,so it should be cooled as slowly
as possible in the furnace or in sand after forged.
Heat Treatment
Soft Annealing
Heat to 650-720ºC, cool slowly in the furnace. This will produce a maximum Brinell hardness of 248.
Hardening
Harden from a temperature of 870-930ºC, followed by oil/polymer or water quenching.
Tempering
Tempering temperature: 580-700ºC.
Nitriding
Gas/plasma nitriding temperature (gas, salt bath): 570-580ºC
Gas/plasma nitriding temperature (powder, plasma): 580ºC
Surface hardness after nitriding: 800 HV
| Hold time,h | Hardness,HV | ||||||
| 30 | 750 | 540 | 430 | 410 | 400 | 380 | 380 |
| 90 | 830 | 750 | 640 | 530 | 430 | 410 | 410 |
| 120 | 790 | 730 | 660 | 600 | 540 | 460 | 400 |
| 180 | 800 | 760 | 700 | 640 | 580 | 550 | 420 |
| Depth,mm | 0.15 | 0.25 | 0.35 | 0.45 | 0.55 | 0.65 | 1 |
Application
31CrMoV9 nitriding steel is used in mechanics automotive and
general mechanics, which must be nitrided for very high wear
forces,
for example, gears, rods or axes.Structural parts of medium and
large cross sections and high surface hardness, e.g., valve and
gate valves, cylinders for combustion engines, superheated steam
valves and fittings.
F A Q
1. How can I know whether you are a reliable company?
We are engaged in steel for nearly 10 years and have high
visibility in domestic. We welcome you to inspect our company at
any time.
2. Can you guarantee your products?
Yes, we guarantee your 100% satisfaction on all our products.
Please feel free to feedback us immediately.
3. Do you provide samples?
Yes, we can provide most of the product samples. We will charge a
little sample fee. But we will return the charge if you place an
order. if you asked to use DHL, Blue Dart Express, FedEx, etc. to
send samples, you can inform us in advance to prepare.
4. Can I visit your company?
Of course, If you want to order our products and visit our company,
please contact us to make an appointment.
Alloy Round Bar Dia 55-400 Mm Mat DIN 1.8519 31CrMoV9 3-6 Meters Tool Mold Steel
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