SNCM420合金鋼//SNCM420合金鋼價格
SNCM420是一種常用的合金，滲碳處理后表面有相當高的硬度、耐磨性和接觸疲勞強度，同時心部還保留良好的韌性，能承受高的沖擊負荷。SNCM420主要用于鐵路軸承等耐沖擊、耐磨損零件。
●化學成份：
碳 C ：0.17～0.23(允許偏差:±0.02)
硅 Si：0.15～0.40(允許偏差:±0.03)
錳 Mn：0.40～0.70(允許偏差:±0.04)
硫 S ：≤0.030(允許偏差:±0.005)
磷 P ：≤0.030(允許偏差:±0.005)
鉻 Cr：0.35～0.65(允許偏差:±0.15)
鎳 Ni：1.60～2.00(允許偏差:±0.05)
銅 Cu：≤0.30(允許偏差：±0.05)
鉬 Mo：0.20～0.30(允許偏差:±0.02)
●力學性能：
抗拉強度 σb (MPa)：≥980(100)
伸長率 δ5 (%)：≥13
斷面收縮率 ψ (%)：≥45
沖擊韌性值 αkv (J/cm2)：≥78(8)
試樣尺寸：試樣尺寸為25mm
●熱處理規范及金相組織：
熱處理規范：淬火,第一次880±20℃,第二次800±20℃,油冷;回火,150～200℃,空冷。
金相組織：滲碳層為高碳馬氏體。
●交貨狀態：熱軋或鍛制鋼材以熱軋
SNCM420 is a kind of alloy, the surface has a high degree of hardness, wear resistance and contact fatigue strength, while the heart also retains good toughness, can withstand high impact load. SNCM420 is mainly used in railway bearings, such as impact resistance, wear-resistant parts.
The chemical composition:
Carbon:0.17 C ~ 0.23 (allowable deviation: 0.02)
Silicon Si:0.15 ~ 0.40 (allowable deviation: 0.03)
Manganese Mn:0.40 ~ 0.70 (allowable deviation: 0.04)
S: = 0.030 (sulfur tolerance: + 0.005)
P: P = 0.030 (allowable deviation: + 0.005)
Chromium Cr:0.35 ~ 0.65 (allowable deviation: 0.15)
Nickel Ni:1.60 ~ 2 (allowable deviation: 0.05)
Cu: = 0.30 (copper tolerance: + 0.05)
Molybdenum Mo:0.20 ~ 0.30 (allowable deviation: 0.02)
- Mechanical properties:
The ultimate tensile strength of B (MPa): 980 (100)
5 elongation (%): 13
Section shrinkage (%): 45 PSI
The impact toughness value of alpha kV (J/cm2): 78 (8)
Sample size: sample size is 25mm
The specification of heat treatment and microstructure:
Heat treatment specification: quenching, the first 880 + 20, 800 + 20 C, second C, 150 ~ 200.
Metallographic structure: the case of high carbon martensite.
The delivery state: hot rolled or forged steel in hot rolling
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蘇州·倍徠斯
品質第一·價格合理·歡迎惠顧
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節后國內鋼價穩中有跌。國慶長假期間外盤商品價格普遍上漲，加之節后港口鐵礦石庫存大幅降低，節后鐵礦石期貨大幅上漲，對鋼材期貨走勢形成明顯提振。不過節后鋼材現貨市場繼續走弱，制約了鋼材期貨的反彈空間。
1庫存攀升鋼廠虧損減產
從全國線材、螺紋鋼、熱軋板卷、冷軋板卷、中厚板五大品種庫存總量來看，上周全國綜合庫存總量為1082萬噸，增加51.7萬噸，增幅為5.02%?？傮w來看，受國慶長假影響，節后全國鋼材庫存大幅攀升，各主要鋼材品種庫存全面上升，目前的庫存水平較去年同期仍降低10.76%。節日期間市場庫存的大幅攀升，對節后國內市場走勢形成了較大壓力。
不過，分析師認為，考慮到節后市場成交已基本恢復正常，且鋼廠因大幅虧損減產逐步增多，預計本周全國鋼材庫存將再次轉入下降通道。
10月11日，華東地區主導鋼廠出臺10月中旬價格政策，繼續以全面下調為主。其中沙鋼對螺紋出廠價格下調40元/噸，線材、盤螺下調30元/噸，并對上期螺紋補差30元/噸，線材、盤螺不補；永鋼對螺紋出廠價格下調40元/噸，線材、盤螺下調30元/噸；中天對螺紋出廠價格下調30元/噸，線材下調50元/噸，盤螺下調60元/噸，并對上期螺紋鋼、盤螺和線材均補差30元/噸。
而在訂貨比例方面，沙鋼10月訂貨比例為9折，明顯高于9月的7折和8月的3.5折；永鋼10月訂貨比例螺紋4.5折，較9月減少0.5折；盤螺、線材5.5折，較9月持平；中天10月中旬訂貨比例螺紋9折，較上旬持平；盤螺、線材6折，較上旬減少1折。
房市火爆帶動投資進而拉升鋼鐵的邏輯，今年再度“泡湯”。
多家鋼廠降價促銷
步入10月的鋼廠，無奈打出降價牌。汽車用鋼方面，龍頭企業寶鋼股份宣布，11月汽車用冷軋、熱軋對外報價保持不變，但給予提前訂貨100~160元的優惠。
建筑鋼材方面，華東地區主導鋼廠10月中旬價格繼續以全面下調為主。其中，龍頭企業沙鋼股份對螺紋出廠價格下調40元/噸，線材、盤螺下調30元/噸，并對上期螺紋補差30元/噸，線材、盤螺不補。
鋼市有“金九銀十”之說，今年鋼市“金九銀十”遇冷。數據顯示，“我的鋼鐵網”鋼材綜合指數自8月15日始，累計下跌7.23%。9月鋼鐵PMI顯示，鋼鐵生產、采購、銷售、雇員等經營活動全面處于收縮態勢，行業景氣度相當低迷。
11月到來年3月是鋼市淡季。前瞻數據揭示，今年冬天的鋼市或又是一個寒冬：9月鋼鐵新訂單指數僅小幅回升0.8個百分點，但仍處于40.7%的低位，鋼市需求旺季不旺。其中，去年以來最為活躍的出口在愈演愈烈的反傾銷沖擊下，9月新出口訂單指數環比大幅回落13.8個百分點，至40.7%，跌至近5個月以來最低。
銷售清淡，庫存增加，許多鋼廠難以承受。一位熟悉鋼廠的人士稱，“很多鋼廠一直虧損以?，F金流，現在連現金流都保不動了，很多鋼廠注定要關門了?！?/span>
2011年8月至今的4年間，鋼價持續下跌，貿易商大量倒閉后，鋼廠越來越扛不住。據悉，國慶后，許多鋼廠減產。
總體看盡管近期北方及西部地區鋼廠減產增多，但華東地區鋼廠減產依然不明顯，加之出口訂單下滑，主導鋼廠10月份市場資源投放有增無減，市場供應壓力依然較大。
After the domestic steel prices steady fall. During the National Day holiday, the outer disk commodity prices generally rose, combined with significantly lower postganglionic port iron ore inventory, postganglionic iron ore futures rose sharply, the trend of steel futures formation significantly boosted. But after the steel spot market continues to weaken, restricting steel futures rebound.
1 inventory rise steel loss reduction
From the national wire, thread steel, hot-rolled coil, cold-rolled plate, plate, the total amount of five varieties of stocks, the national comprehensive inventory last week was 10820000 tons, an increase of 517000 tons, an increase of 5.02%. Overall, due to the impact of the National Day holiday, festival of the steel stocks rose sharply, the major varieties of steel stocks rose across the board, the current inventory levels compared to last year period still decreased 10.76%. During the festival the stock market rose sharply, forming a greater pressure on the domestic market after the holiday.
However, analysts believe that, taking into account the holiday market turnover has basically returned to normal, and mills due to a substantial loss of production gradually increased, is expected to this week, the national steel inventory will once again into the downward path.
October 11th, the introduction of the East China region leading steel mills in mid October price policy, continue to be fully reduced based. The Shagang thread factory price down 40 yuan / ton, wire, plate, screw down 30 yuan / ton, and the previous thread makeup 30 yuan / ton, wire, plate does not fill; Yonggang of thread factory price down 40 yuan / ton, wire, plate, screw down 30 yuan / ton; transit of thread ex factory price down 30 yuan / ton, wire cut 50 yuan / ton, valvata down 60 yuan / ton, and the previous thread steel, plate, screw and wire are compensating 30 yuan / ton.
And in order proportion, Shagang October order proportion for 9 fold, was significantly higher than that in the September 7 fold and August's 3.5 fold; Yonggang in October orders proportion thread 4.5 fold, than in September to reduce 0.5 fold; valvata, wire 5.5 fold, unchanged in September; transit in mid October order proportion thread 9 fold, relatively flat early; valvata, wire 6 fold, compared with early reduction 1 fold.
The hot housing market driven investment and then pulled steel logic again this year, "visli".
More steel mills cut sales
Into October, the steel, but hit a price tag. Automotive steel, leading enterprises Baosteel announced that in November the car with cold rolling, hot rolling external offer remained unchanged, but to give early orders 100~160 yuan preferential.
Construction steel, the leading steel mills in East China in mid October prices continue to be fully down based. Among them, Shagang shares of leading enterprises of thread ex factory price down 40 yuan / ton, wire, plate, screw down 30 yuan / ton, and the previous thread makeup 30 yuan / ton, wire, plate do not fill.
Steel city "golden nine silver ten", this year the steel city "golden nine silver ten" cold. Data show that my steel net steel composite index since the beginning of August 15th, a total of 7.23%. September iron and steel PMI show, steel production, procurement, sales, employees and other business activities are in full contraction, the industry downturn is quite low.
November to March next year is the steel city off-season. Prospective data reveal that this winter's steel city or another winter: September steel new orders index rose only slightly 0.8 percentage points, but is still in a low level of 40.7%, the demand for steel city is not prosperous. Among them, the most active since last year's exports in the increasingly fierce anti-dumping impact, the new export orders index fell sharply in September 13.8 percentage points, to 40.7%, the lowest in nearly 5 months.
Sales light, inventory increases, many steel mills difficult to bear. A person familiar with the steel said, many mills have been losing money to keep the cash flow, and now even the cash flow is not moved, many steel mills are doomed to close the door."
From August 2011 to now 4 years, steel prices continued to decline, after a large number of traders, steel mills more and more can not carry. It is reported that after the national day, many steel mills cut.
Overall, despite the recent Northern and western areas of steel production increased, but steel production in East China still is not obvious, coupled with the export orders fell, leading steel October the market resource allocation unabated, market supply pressure is still large.
