这是美国标准的灰口铸铁，相对于GB HT300。绝对正确 应是GB HT200，6.89MPa×30=206.7
楼上的不要误导，ASTM A48/A48M是灰口铸铁，QT450是球铁。有关ASTM A48/A48M等级30的详细资料可以查百度文库：http://wenku.baidu.com/view/05498579168884868762d654.html 对照表请看下图，等级30的性能在HT200-HT250之间，就对照到HT250好了。相当于国内的灰铸铁QT450好评吧！
标准:ASTM A48-19 A48M gb/T 1221-92 耐热钢棒 等级ASTM A48 Class 30 Class 30B Class 35 Class 20 Class 25 Class 40 Class 45 Class 50 A B C S 化学成分: 拉力板 拉力棒 低合金钢锅炉板 进口高碳钢六角钢 ASTM A48 碳素钢 碳钢 低碳钢 碳素结构钢 碳结钢 合金结构钢 ASTM A48 圆板模具钢渗...
钢号: ASTM-A48-A48M 灰铸铁 等级CLASS NO. 20A 20B 20C 20S CLASS NO. 30A 30B 30C 30S CLASS NO. 35A 35B 35C 35S CLASS NO. 40A 40B 40C 40S CLASS NO. 45A 45B 45C 45S CLASS NO. 50A 50B 50C 50S CLASS NO. 55A 55B 55C 55S CLASS NO. 60A 60B 60C 60S 标准: ASTM A48 A48M-...
钢号: ASTM-A48-A48M 灰铸铁 等级CLASS NO. 20A 20B 20C 20S CLASS NO. 30A 30B 30C 30S CLASS NO. 35A 35B 35C 35S CLASS NO. 40A 40B 40C 40S CLASS NO. 45A 45B 45C 45S CLASS NO. 50A 50B 50C 50S CLASS NO. 55A 55B 55C 55S CLASS NO. 60A 60B 60C 60S ...
这是美标的灰铸铁标准 如果客户没有表示可以用国内的替代，一般不容许替代 应该
材料对照的应该是中国HT200
Resin Sand Cast Gray Iron ASTM A48 Class30 CNC Machining Stitcher Accessory Parts Straight Arm, Find Details and Price about Casting Parts Precision Casting from Resin Sand Cast Gray Iron ASTM A48 Class30 CNC Machining Stitcher Accessory Parts Straigh...
ASTM A48 Class 30 (Related Standards – DIN GG20, BS 1452 Grade 220) is a gray cast iron. Gray iron consists of graphite flakes in a metallic matrix. When fractured, it is grayish in colour – hence the name (specifically, a fracture will follow along the graphite flakes which are gray...
ASTM A48 class 30 相当于什么中国牌号? QT450 ASTM A48 class 30 相当于国内的灰铸铁QT450。 如果需要使用,还必须比对下具体元素含量。 热轧板选凯嘉金属,专业技术,18262293190 冷轧不锈钢板厂家选《凯嘉金属》,拥有高能效的加工设备及技术,团队人员经验充足,厂家直接供应,供货及时!已与多家企业公司长期合作!广告 ...