SAE4340 Hlau Round Bar ASTM4340 Hlau Qws
Nta
Cov khoom ntawm 4340 steel bar yog alloy structural steel.Sib npaug rau German DIN steel qib 36CrNiMo4, Fabkis NF txuj 40NCD3, Japanese JIS txuj SNCM439, British BS txuj 816M40, American SAE / ASTM4340, American UNS txuj G43400, Tuam Tshoj Standard 40CrNiMoA.
SAE4340 yog lub npe hu ua alloy structural steel lossis composite steel.Cov hlau muaj npib tsib xee ntawm 1.65 thiab 2.00, uas muaj lub zog siab, toughness, siab harden peev xwm, thiab stability tiv thaiv overheating.Txawm li cas los xij, nws muaj qhov rhiab heev rau cov pob dawb thiab temper brittleness.Kev nyeem tsis zoo, yuav tsum tau ua kom kub kub ua ntej vuam, kev ntxhov siab tom qab vuam, thiab siv tom qab tempering.
Standard: ASTM A29 / A29M-2012 los yog SAE J404
Specification
| Cov pa roj carbon C | 0.38-0.43 Nws |
| Silicon Si | 0.15-0.35 Nws |
| Manganese Mn | 0.60-0.80 Nws |
| Sulfur S | ≤ 0.030 |
| Phosphorus P | ≤ 0.025 |
| Chromium Cr | 0.60-0.90 Nws |
| Nickel | 1.65-2.00 Nws |
| Tooj Cu | ≤ 0.025 |
| Molybdenum Cov | 0.20-0.30 Nws |
Mechanical zog
| Tensile zog σb (MPa) | ≥980 |
| Yield zog σs (MPa) | ≥835 |
| Elongation tus nqi δ 5 (%) | ≥12 |
| Txo thaj tsam ψ (%) | ≥55 |
| Impact zog Akv (J) | ≥ 78 |
| Qhov cuam tshuam toughness tus nqi α kv (J / cm2) | ≥98 |
Kev kho cua sov specifications
quenched ntawm 850 ℃, roj txias;Kub ntawm 600 ℃, dej txias, roj txias.
Daim ntawv thov
Feem ntau siv rau kev tsim cov khoom tseem ceeb nrog lub zog siab thiab zoo yas, thiab rau kev tsim cov khoom tseem ceeb nrog kev ua haujlwm tshwj xeeb tom qab kho nitrating:
-Heavy machinery nrog siab load shafts
-Wheel ncej nrog ib txoj kab uas hla ntau tshaj 250mm
- Lub rotor ncej ntawm lub nyoob hoom qav taub
-Cov turbine ncej, hniav, thiab siab load kis tau tus mob Cheebtsam ntawm ib tug turbojet engine
-Crankshaft fasteners, iav, thiab lwm yam.
Pob
1.By bundles, txhua nras hnyav nyob rau hauv 3 tons, rau me me txheejtxoj kab uas hla puag ncig bar, txhua pob nrog 4 - 8 steel strips.
2.20 feet thawv muaj qhov ntev, ntev hauv qab 6000mm
3.40 feet thawv muaj qhov ntev, ntev hauv qab 12000mm
4.By bulk nkoj, Freight nqi yog tsawg los ntawm bulk cargo, thiab lojhnyav qhov ntau thiab tsawg tsis tuaj yeem thauj mus rau hauv cov thawv tuaj yeem xa los ntawm cov khoom thauj ntau
Pob
Kev ruaj ntseg zoo
1. nruj raws li qhov yuav tsum tau ua
2. Qauv: Qauv muaj.
3. Kev sim: ntsev tsuag tshuaj ntsuam / Tensile xeem / Eddy tam sim no / Tshuaj muaj pes tsawg leeg kuaj raws li cov neeg siv khoom thov
4. Daim ntawv pov thawj: IATF16949, ISO9001, SGS thiab lwm yam.
5. EN 10204 3.1 Daim ntawv pov thawj
