GSO ISO 898-1:2013由GSO 发布于 2013-12-31。
GSO ISO 898-1:2013在国际标准分类中归属于: 21.060.10 螺栓、螺钉、螺柱。
GSO ISO 898-1:2013 碳钢和合金钢紧固工具的机械性能 第1部分:钉子、螺栓和螺栓的最新版本是哪一版?
最新版本是 GSO ISO 898-1:2013 。
This part of ISO 898 specifies mechanical and physical properties of bolts, screws and studs made of carbon steel and alloy steel when tested at an ambient temperature range of 10 °C to 35 °C. Fasteners (the term used when bolts, screws and studs are considered all together) that conform to the requirements of this part of ISO 898 are evaluated at that ambient temperature range. They might not retain the specified mechanical and physical properties at elevated temperatures (see Annex B) and/or lower temperatures. NOTE 1 Fasteners conforming to the requirements of this part of ISO 898 are used in applications ranging from −50 °C to +150 °C. Users are advised to consult an experienced fastener metallurgist for temperatures outside the range of −50 °C to +150 °C and up to a maximum temperature of +300 °C when determining appropriate choices for a given application. NOTE 2 Information for the selection and application of steels for use at lower and elevated temperatures is given, for example, in EN 10269, ASTM F2281 and in ASTM A320/A320M. Certain bolts and screws might not fulfil the tensile or torsional requirements of this part of ISO 898 because the geometry of their heads reduces the shear area in the head compared to the stress area in the thread. These include bolts and screws having a low or countersunk head (see 8.2). This part of ISO 898 is applicable to bolts, screws and studs — made of carbon steel or alloy steel, — having triangular ISO metric screw thread in accordance with ISO 68-1, — with coarse pitch thread M1,6 to M39, and fine pitch thread M8×1 to M39×3, — with diameter/pitch combinations in accordance with ISO 261 and ISO 262, and — having thread tolerances in accordance with ISO 965-1, ISO 965-2 and ISO 965-4. It is not applicable to set screws and similar threaded fasteners not under tensile stress (see ISO 898-5). It does not specify requirements for such properties as — weldability, — corrosion resistance, — resistance to shear stress, — torque/clamp force performance (for test method, see ISO 16047), or — fatigue resistance.
参考文献:[1] GB/T 4336-2016碳素钢和中低合金钢 多元素含量的测定火花放电原子发射光谱法(常规法)[2] GB/T 4340.1-2009《金属维氏硬度试验第 1 部分:试验方法》[3] GB/T 3098.2-2015 紧固件机械性能螺母END轻松一点,赞和在看都在这儿!...
钢的种类很多,按有没有加入碳以外其他元素,可分为碳素钢和合金钢两大类,按含碳量多少又可分为低碳钢(C0.6%)三类。碳素钢没有为改善性能而加入碳以外其他元素的钢称为碳素钢。碳素钢的力学性能能满足许多设备的结构件和机械零件的要求,也能满足部分工具钢的要求,有优良的工艺性和价格较低等优点,在汽车行业及其他行业中得到广泛应用。合金钢在碳钢中加入一种或多种适量合金元素,以改善钢的某种性能,称为合金钢。...
回火工艺:一、退火1、完全退火和等温退火完全退火又称重结晶退火,一般简称为退火,这种退火主要用于亚共析成分的各种碳钢和合金钢的铸,锻件及热轧型材,有时也用于焊接结构。一般常作为一些不重工件的最终热处理,或作为某些工件的预先热处理。2、球化退火球化退火主要用于过共析的碳钢及合金工具钢(如制造刃具,量具,模具所用的钢种)。其主要目的在于降低硬度,改善切削加工性,并为以后淬火作好准备。...
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