| 详细介绍：
SNCM420合金钢//SNCM420合金钢价格
SNCM420是一种常用的合金，渗碳处理后表面有相当高的硬度、耐磨性和接触疲劳强度，同时心部还保留良好的韧性，能承受高的冲击负荷。SNCM420主要用于铁路轴承等耐冲击、耐磨损零件。
●化学成份：
碳 C ：0.17～0.23(允许偏差:±0.02)
硅 Si：0.15～0.40(允许偏差:±0.03)
锰 Mn：0.40～0.70(允许偏差:±0.04)
硫 S ：≤0.030(允许偏差:±0.005)
磷 P ：≤0.030(允许偏差:±0.005)
铬 Cr：0.35～0.65(允许偏差:±0.15)
镍 Ni：1.60～2.00(允许偏差:±0.05)
铜 Cu：≤0.30(允许偏差：±0.05)
钼 Mo：0.20～0.30(允许偏差:±0.02)
●力学性能：
抗拉强度 σb (MPa)：≥980(100)
伸长率 δ5 (%)：≥13
断面收缩率 ψ (%)：≥45
冲击韧性值 αkv (J/cm2)：≥78(8)
试样尺寸：试样尺寸为25mm
●热处理规范及金相组织：
热处理规范：淬火,第一次880±20℃,第二次800±20℃,油冷;回火,150～200℃,空冷。
金相组织：渗碳层为高碳马氏体。
●交货状态：热轧或锻制钢材以热轧 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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品质第一·价格合理·欢迎惠顾
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节后国内钢价稳中有跌。国庆长假期间外盘商品价格普遍上涨，加之节后港口铁矿石库存大幅降低，节后铁矿石期货大幅上涨，对钢材期货走势形成明显提振。不过节后钢材现货市场继续走弱，制约了钢材期货的反弹空间。
1库存攀升钢厂亏损减产
从全国线材、螺纹钢、热轧板卷、冷轧板卷、中厚板五大品种库存总量来看，上周全国综合库存总量为1082万吨，增加51.7万吨，增幅为5.02%。总体来看，受国庆长假影响，节后全国钢材库存大幅攀升，各主要钢材品种库存全面上升，目前的库存水平较去年同期仍降低10.76%。节日期间市场库存的大幅攀升，对节后国内市场走势形成了较大压力。
不过，分析师认为，考虑到节后市场成交已基本恢复正常，且钢厂因大幅亏损减产逐步增多，预计本周全国钢材库存将再次转入下降通道。
10月11日，华东地区主导钢厂出台10月中旬价格政策，继续以全面下调为主。其中沙钢对螺纹出厂价格下调40元/吨，线材、盘螺下调30元/吨，并对上期螺纹补差30元/吨，线材、盘螺不补；永钢对螺纹出厂价格下调40元/吨，线材、盘螺下调30元/吨；中天对螺纹出厂价格下调30元/吨，线材下调50元/吨，盘螺下调60元/吨，并对上期螺纹钢、盘螺和线材均补差30元/吨。
而在订货比例方面，沙钢10月订货比例为9折，明显高于9月的7折和8月的3.5折；永钢10月订货比例螺纹4.5折，较9月减少0.5折；盘螺、线材5.5折，较9月持平；中天10月中旬订货比例螺纹9折，较上旬持平；盘螺、线材6折，较上旬减少1折。
房市火爆带动投资进而拉升钢铁的逻辑，今年再度“泡汤”。
多家钢厂降价促销
步入10月的钢厂，无奈打出降价牌。汽车用钢方面，龙头企业宝钢股份宣布，11月汽车用冷轧、热轧对外报价保持不变，但给予提前订货100~160元的优惠。
建筑钢材方面，华东地区主导钢厂10月中旬价格继续以全面下调为主。其中，龙头企业沙钢股份对螺纹出厂价格下调40元/吨，线材、盘螺下调30元/吨，并对上期螺纹补差30元/吨，线材、盘螺不补。
钢市有“金九银十”之说，今年钢市“金九银十”遇冷。数据显示，“我的钢铁网”钢材综合指数自8月15日始，累计下跌7.23%。9月钢铁PMI显示，钢铁生产、采购、销售、雇员等经营活动全面处于收缩态势，行业景气度相当低迷。
11月到来年3月是钢市淡季。前瞻数据揭示，今年冬天的钢市或又是一个寒冬：9月钢铁新订单指数仅小幅回升0.8个百分点，但仍处于40.7%的低位，钢市需求旺季不旺。其中，去年以来最为活跃的出口在愈演愈烈的反倾销冲击下，9月新出口订单指数环比大幅回落13.8个百分点，至40.7%，跌至近5个月以来最低。
销售清淡，库存增加，许多钢厂难以承受。一位熟悉钢厂的人士称，“很多钢厂一直亏损以保现金流，现在连现金流都保不动了，很多钢厂注定要关门了。”
2011年8月至今的4年间，钢价持续下跌，贸易商大量倒闭后，钢厂越来越扛不住。据悉，国庆后，许多钢厂减产。
总体看尽管近期北方及西部地区钢厂减产增多，但华东地区钢厂减产依然不明显，加之出口订单下滑，主导钢厂10月份市场资源投放有增无减，市场供应压力依然较大。
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.
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