AISI 4340 1.6511 Alloy Steel Round Bar 36CrNiMo4 SNCM439
Price:
$0.60 / Kilogram
MOQ:
1000 Kilogram
Delivery Time:
Negotiable
Brand:
Gnee
Product Description
AISI 4340 1.6511 36CrNiMo4 SNCM439 Round Steel Bar Round Bar Round Bar Rod
AISI 4340 steel (UNS G43400) is an ultra-high strength medium carbon low alloy steel, which combines deep hardenability, high ductility, toughness and strength, and has high fatigue resistance and creep resistance. 4340 steel & equivalents: 36CrNiMo4, 1.6511, EN24, SNCM439 etc.
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Standard
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JIS ASTM GB EN AISI
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Size
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Diameter:16-250mm
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Length:4000-15000mm
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Technique
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Hot Rolled / Cold Rolled / Forged
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Package
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Export Standard Package,bundled or be required
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Service
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Cutting Service , Customized Fabrication Service
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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
Chemical Composition
| Standard | Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
| ASTM A29 | 4340 | 0.38-0.43 | 0.15-0.35 | 0.6-0.8 | ≤ 0.035 | ≤ 0.04 | 0.7-0.9 | 1.65-2.0 | 0.2-0.3 |
EN10250 |
36CrNiMo4 | 0.32-0.4 |
≤ 0.4 |
0.5-0.8 |
≤ 0.035 |
≤ 0.035 |
0.9-1.2 |
0.90-1.2 |
0.15-0.3 |
| 1.6511 | |||||||||
BS 970 |
EN24 | 0.36-0.44 |
0.1-0.4 |
0.45-0.7 |
≤ 0.035 |
≤ 0.04 |
1.0-1.4 |
1.3-1.7 |
0.2-0.35 |
| 817M40 | |||||||||
| JIS G4103 | SNCM439 | 0.36-0.43 | 0.15-0.35 | 0.6-0.9 | ≤ 0.03 | ≤ 0.03 | 0.6-1.0 | 1.6-2.0 | 0.15-0.3 |
| GB 3077 | 40CrNiMoA | 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | ≤ 0.025 | ≤ 0.025 | 0.6-0.9 | 1.25-1.65 | 0.15-0.25 |
3.Physical Property
| Density g/cm3 | 7.85 | ||||
| Melting point °C | 1427 | ||||
| Poisson's ratio | 0.27-0.30 | ||||
| Machinability (AISI 1212 as 100% machinability) | 50% | ||||
| Thermal expansion co-efficient µm/m°C | 12.5 | ||||
| Thermal conductivity W/(m.K) | 44.5 | ||||
| Modulus of elasticity 10^3 N/mm^2 | 210 | ||||
| Electric resistivity Ohm.mm2 /m | 0.19 | ||||
| Specific heat capacity J/(kg.K) | 460 | ||||
| Modulus of elasticity 10^3 N/mm2 | 100 ℃ | 200 ℃ | 300 ℃ | 400 ℃ | 500 ℃ |
| 205 | 195 | 185 | 175 | 165 | |
| Thermal expansion 10^6 m/(m.K) | 100 ℃ | 200 ℃ | 300 ℃ | 400 ℃ | 500 ℃ |
| 11.1 | 12.1 | 12.9 | 13.5 | 13.9 | |
Mechanical Property
| Mechanical Condition | T | U | V | W | X | Y | Z |
| Ruling Section (mm) | 150 | 100 | 63 | 30 | 30 | 30 | 30 |
| Tensile Strength Mpa | 850-1000 | 930-1080 | 1000-1150 | 1080-1230 | 1150-1300 | 1230-1380 | >1550 |
| Yield Strength,Mpa | ≥665 | ≥740 | ≥835 | ≥925 | ≥1005 | ≥1080 | ≥1125 |
| Elongation % | ≥13 | ≥12 | ≥12 | ≥11 | ≥10 | ≥10 | ≥5 |
| Izod Impact J | ≥54 | ≥47 | ≥47 | ≥41 | ≥34 | ≥24 | ≥10 |
| Charpy Impact J | ≥50 | ≥42 | ≥42 | ≥35 | ≥28 | ≥20 | ≥9 |
| Brinell Hardness HB | 248-302 | 269-331 | 293-352 | 311-375 | 341-401 | 363-429 | >444 |
High Temperature Strength
| For quenched and tempered heavy forgings | |||||||
Diameter mm |
Yield strength MPa | ||||||
| 20 ℃ | 100 ℃ | 200 ℃ | 250 ℃ | 300 ℃ | 350℃ | 400℃ | |
| ≤250 | 590 | 549 | 510 | 481 | 441 | 412 | 371 |
| 250-500 | 540 | 505 | 471 | 451 | 412 | 383 | 353 |
| 500-750 | 490 | 466 | 441 | 422 | 392 | 363 | 343 |
FAQ
1. How fast you can make delivery?
Stock sizes 3-5 days, 10-20 workings for customize sizes.
Stock sizes 3-5 days, 10-20 workings for customize sizes.
2. How to contact us?
Trade manager online, chat with me directly.
Send an inquiry to us. Send email to me, or call me directly.
3. How can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;
4.What can you buy from us?
4.What can you buy from us?
Hot Rolled Steel Sheet,Hot Rolled Steel Coil,Seamless Steel Tube,Cold Rolled Steel Coil,Galvanized Steel Coil,Round Bar
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Gnee Steel (tianjin) Co., Ltd.
Location
FLAT/RM 1512 15/F LUCKY CENTRE NO.165-171 WAN CHAI ROAD WAN CHAI HK
Contact Person
Kelly Zhang