Big discounting AISI 4340 Steel | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439 Supply to New Delhi
AISI 4340 steel is a medium carbon, low alloy steel known for its toughness andstrength in relatively large sections. AISI 4340 is also one kind ofnickel chromium molybdenum steels. 4340 alloy steel is generallysupplied hardened and tempered in the tensile range of 930 – 1080 Mpa.Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding. The 4340 steel has goodshock and impact resistance as well as wear and abrasion resistanc...
Innovation, quality and reliability are the core values of our company. These principles today more than ever form the basis of our success as an internationally active mid-size company for Big discounting AISI 4340 Steel | 36CrNiMo4 | 1.6511 | EN24 | 817M40 | SNCM439 Supply to New Delhi, Contact with us today! We are ready for the market service now!
is a medium carbon, low alloy steel known for its toughness and
strength in relatively large sections. AISI 4340 is also one kind of
nickel chromium molybdenum steels. 4340 alloy steel is generally
supplied hardened and tempered in the tensile range of 930 – 1080 Mpa.
Pre hardened and tempered 4340 steels can be further surface hardened by
flame or induction hardening and by nitriding. The 4340 steel has good
shock and impact resistance as well as wear and abrasion resistance in
the hardened condition. AISI 4340 steel properties offer good ductility
in the annealed condition, allowing it to be bent or formed. Fusion and
resistance welding is also possible with our 4340 alloy steel. ASTM 4340
material is often utilized where other alloy steels do not have the
hardenability to give the strength required. For highly stressed parts
it is excellent choice. AISI 4340 alloy steel can also be machined by
all customary methods.
Due to availability the ASTM 4340 grade steel is often substituted
with European based standards 817M40/EN24 and 1.6511/36CrNiMo4 or Japan
based SNCM439 steel. You have the detailed data of 4340 steel below.
1. AISI 4340 Steel Specification and Relevant Standards
|Standard||EN 10250||JIS G4103|
2. ASTM 4340 Steels And Equilvalents Chemical Composition
|JIS G4103||SNCM 439/SNCM8||0.36-0.43||0.60-0.90||0.030||0.030||0.15-0.35||1.60-2.00||0.60-1.00||0.15-0.30|
3. AISI Alloy 4140 Steel Mechanical Properties
(Heat Treated Condition )
|Tensile Strength MPa||Yield Strength
|Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper||12.3 µm/m°C||6.83 µin/in°F|
|Thermal conductivity (typical steel)||44.5 W/mK||309 BTU in/hr.ft².°F|
4. Forging of 4340 Alloy Steel
the steel 4340 first, heat up to 1150°C – 1200°C maximum for forging,
hold until temperature is uniform throughout the section.
Do not forge
below 850 °C. 4340 has good forging characteristics but care must be
taken when cooling as the steel shows susceptibility to cracking.
Following forging operation the work piece should be cooled as slowly as
possible. And cooling in in sand or dry lime is recommended etc.
5. AISI 4340 Steel Grade Heat Treatment
pre-hardened steel stress relieving is achieved by heating steel 4340
to between 500 to 550°C. Heat to 600 °C – 650 °C, hold until temperature
is uniform throughout the section, soak for 1 hour per 25 mm section,
and cool in still air.
full anneal may be done at 844°C (1550 F) followed by controlled
(furnace) cooling at a rate not faster than 10°C (50 F) per hour down to
315°C (600 F). From 315°C 600 F it may be air cooled.
4340 alloy steel should be in the heat treated or normalized and heat
treated condition before tempering. The tempering temperature for
depends upon the strength level desired. For strength levels in the 260 –
280 ksi range temper at 232°C (450 F). For strength in the 125 – 200
ksi range temper at 510°C (950 F). And don’t temper the 4340 steels if
it is in the 220 – 260 ksi strength range as tempering can result in
degradation of impact resistance for this level of strength.
Tempering should be avoided if possible within the range 250 °C – 450 °C due to temper brittleness.
Flame or Induction Hardening
As mentioned above, pre-hardened and tempered 4340 steel bars or plates can be further surface hardened by either the flame or induction hardening
methods resulting in a case hardness in excess of Rc 50. AISI 4340
steel parts should be heated as quickly as possible to the austenitic
temperature range (830 °C – 860 °C) and required case depth followed by
an immediate oil or water quenching, depending upon hardness required,
workpiece size/shape and quenching arrangements.
quenching to hand warm, tempering at 150°C – 200°C will reduce stresses
in the case with minimal effect on its hardness.
All de-carburised surface material must first be removed to ensure best results.
and tempered 4340 alloy steel can also be nitrided, giving a surface
hardness of up to Rc 60. Heat to 500°C – 530°C and hold for sufficient
time (from 10 to 60 hours) to develop the depth of case. Nitriding
should be followed by slow cooling (no quench) reducing the problem of
distortion. The nitrided grade 4340 materials can therefore be machined
to near final size, leaving a small grinding allowance only. The tensile
strength of the 4340 steel material core is usually not affected since
the nitriding temperature range is generally below the original
tempering temperature employed.
Surface hardness achievable is 600 to 650HV.
is best done with the alloy steel 4340 in the annealed or normalized
and tempered condition. It can be readily machined by all conventional
methods such as sawing, turning, drilling etc. However in the high
strength conditions of 200 ksi or greater the machinability is only from
25% to 10% that of the alloy in the annealed condition.
of steel 4340 in the hardened and tempered condition (as normally
supplied), is not recommended and should be avoided if at all possible,
because of the danger of quench cracking, as the mechanical properties
will be altered within the weld heat affected zone.
must be carried out, pre-heat to 200 to 300°C and maintain this while
welding. Immediately after welding stress relieve at 550 to 650°C, prior
to hardening and tempering.
If welding in the hardened and
tempered condition is really necessary, then the work piece, immediately
on cooling to hand warm, should be if possible stress relieved at 15 °C
below the original tempering temperature.
8. Application of 4340 Steel
4340 steel is used in most industry sectors for applications requiring
higher tensile/yield strength than 4140 steel can provide.
Some typical applications such as:
Aircraft Landing Gear
Oil and Gas Drilling,
Warm and Cold Forming,
Transfer Systems, like power transmission gears and shafts.
engineering industries and structural use applications, such as: heavy
duty shafts, gears, axles, spindles, couplings, pins, chucks, molds etc.
Damascus Folding Knife Damascus Hunting Knife Damascus Bowie Knife Best Survival Knife Groomsmen Gifts Tanto Hunting Knife Tactical Knife
Knives Come With A Sheath Custom High Quality Double Layers of Hard Genuine Leather. The leather is water proof and has double layers inside. The leather we used to make sheath is Camel, Goat and Buffalo. The leather has been treated with extra process to get the natural looks of snake, alligator, leopard, skins etc, and we tried to matches each sheath cover with the knife handle. Extra work is done on the leather sheath cover to make it colorful, unique and beautiful.
Collectors Knife Feels Great In Your Hand and Pocket ! Great For Personal Use, Or A Fine Gift DKC KNIVES TM..The Collection You Will Be Proud Of
Over 320 Layers, 15N20 & 1095 Damascus Mixture of steel and high, low Carbon and HRC approximately 50 to 60. The knife blade is 100% hand forged and is the results of hours of work. The Damascus steel used for this knife was created by forge welding multiple layers of 15N20 & 1095 steel into a solid billet. Heat Treatment: Excellent heat treatment to blade/ oil quenched. Our craftsman use heat treatment and oil quenching to create a perfect blade. The billet of the blade is forged, welded and hand hammered several times and dipped in the motel salt to get the unique patterns.
To make a custom hand made knife is a skillful art that requires hard work and careful attention. This marvelous knife is very impressive due to its excellent design & detail. We take great pride when designing our knives. The knife is well balanced and has an excellent grip, creating a natural weight and feel when held. Our craftsman put extra work in each knife by carefully designing, carving and hand making it into a breathtaking work of art. There may be slight variations in finish, colors, etc. because they are hand made and variations in natural materials. You are purchasing a knife that will give you many years of great service as well as provide a family heirloom that you can hand down to family members. Please see our full line of knives…we have a fast growing base of knife collectors that eagerly wait for new knife releases. Buy two or three different model DKC KnivesTM and you will see. Our knives are value priced and compare to other custom knives costing two to five times the amount we sell our knives for. Since knives are one of those areas where its possible for fake copies to be made, please be sure to purchase only from SAN FRANCISCO SUPPLY the only authorized factory reseller of DKC Knives. In addition, starting January 1, 2015 most of our knives will have a DKCTM engraving. Look for factory information in your box about knife care. Knives are well boxed, and typically arrive wrapped in plastic with a good coat of oil to protect the knife. When you receive your knife, take a soft cloth and clean off the knife..but as with all steel knives..keep it well oiled to preserve function, look, and beauty. Knives are for responsible adults only. You must be 18 Years or older to purchase this knife. While all our knives are field quality, we do not support or advocate the use of knives for any type of violent activity. We look forward to having you as a long term customer and thanks for purchasing a fine quality knife. THANKS FROM DKC KNIVES !
Description http://www.advancedglobalmaterials.com, or Call us at 631-286-8570 for a quote. We supply all AMS Specs, Alloy Steel,Stainless Steel,Aluminum, Titanium and Nickel