Gnee (Tianjin) Multinational Trade Co., Ltd.
Gnee (Tianjin) Multinational Trade Co., Ltd.
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AISI L6 1.2714 SKT4 Round Steel Bar Round Bar Round Bar Rod Round Steel Bar Stock
SKT4 tool steel-JIS G4404 JIS SKT4 is a hot work tool steel grade with widely application. SKT4 is similar to L6 hot work tool steel, no matter in properties or in applications. the cost and price for both SKT4 and L6 steels only have a little different. Hot work JIS SKT4 tool steel grade in standard JIS G4404,Some equivalent steel is 1.2714, 55NiCrMoV7, SKT4, BH224/5 steel.
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 | V |
| ASTM A681 | L6 | 0.65-0.75 | 0.1-0.5 | 0.25-0.80 | 0.03 | 0.03 | 0.6-1.2 | 1.25-2.0 | 0.50 | — |
DIN EN ISO 4957 | 1.2714 | 0.50-0.60 | 0.1-0.4 | 0.60-0.90 | 0.03 | 0.02 | 0.8-1.2 | 1.50-1.8 | 0.35-0.55 | 0.05-0.15 |
| 55NiCrMoV7 | ||||||||||
| JIS G4404 | SKT4 | 0.50-0.60 | 0.1-0.4 | 0.60-0.90 | 0.03 | 0.02 | 0.8-1.2 | 1.50-1.8 | 0.35-0.55 | 0.05-0.15 |
Physical Property
| Density,kg/dm3 | 7.8 |
| Specific heat capacity,J/g.K | 0.46 |
| Thermal conductivity ,W/m.K | 35.9 |
| Specific electric resist,Ohm mm2/m | 0.3 |
| Electrical conductivity,m/mm2 | 3.33 |
| Modulus of elasticity long.,Gpa | 215 |
| Modulus of elasticity tang.,Gpa | 82 |
Thermal Property
| Temperature,°C | 20-100 | 20-200 | 20-300 | 20-400 | 20-500 | 20-600 | 20-700 |
| Thermal expansion,10^-6 m/(m*K) | 12.5 | 13.1 | 13.4 | 13.9 | 14 | 14.3 | 14.5 |
| Temperature,°C | 20 | 350 | 700 | ||||
| Thermal Conductivity,W/(m*K) | 35 | 39 | 36 | ||||
Mechanical Property
Quenching at 860 °C in oil | Tempering | 100°C | 150°C | 200°C | 250°C | 300°C | 350°C | 400°C | 450°C | 500°C | 550°C | 600°C | 650°C |
| HB | 634 | 615 | 595 | 577 | 543 | 512 | 482 | 468 | 442 | 409 | 390 | — | |
| HRC | 59 | 58 | 57 | 56 | 54 | 52 | 50 | 49 | 47 | 44 | 42 | — | |
| R,N/mm 2 | 2420 | 2330 | 2240 | 2160 | 2010 | 1880 | 1760 | 1700 | 1580 | 1430 | 1340 | — | |
Quenching at 860 °C in air | Tempering | 100°C | 150°C | 200°C | 250°C | 300°C | 350°C | 400°C | 450°C | 500°C | 550°C | 600°C | 650°C |
| HB | 560 | — | 512 | — | 482 | — | 442 | 421 | 400 | 371 | 336 | 301 | |
| HRC | 55 | — | 52 | — | 50 | — | 47 | 45 | 43 | 40 | 36 | 32 | |
| R,N/mm 2 | 2070 | — | 1880 | — | 1760 | — | 1580 | 1480 | 1390 | 1250 | 1110 | 1010 |
Our Advantages
(1): High quality with reasonable price.
(2): Wide excellent experiences with after-sale service.
(3): Every process will be checked by responsible QC which insures every product's quality.
(4): Professional packing teams which keep every packing safely.
(5): Trial order can be done in one week.
(6): Free Samples can be provided as your requirements.
FAQ
Q: Are you trading company or manufacturer
A: We have our own factory with complete production equipment and inspection facilities also doing steel bars trading.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free of charge but do not pay the cost of freight.