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钢材力学性能指标汇总表
日期:2007-03-14来源:作者:pdsh
钢材力学性能指标汇总表

钢筋的公称横截面积与公称重量
公称直径,mm        公称横截面积mm 2        公称重量,Kg/m
6.5        33.18        
8        50.27        0.395
10        78.54        0.617
12        113.1        0.888
14        153.9        1.21
16        201.1        1.58
18        254.5        2.00
20        314.2        2.47
22        380.1        2.98
25        490.9        3.85
28        615.8        4.83
32        804.2        6.31
36        1018        7.99
40        1257        9.87
50        1964        15.42
注:表中公称重按密度为7.85g/cm3计算。

一、        钢筋混凝土用热轧带肋钢精GB1499-1998
1、        力学性能
牌号        公称直径mm        屈服点σsMpa        抗拉强度σbMpa        伸长率δs%
                不小于
HRB335        6~25  28~50        335        490        16
HRB400        6~25  28~50        400        570        14
HRB500        6~25  28~50        500        630        12
2、弯曲性能(按下表规定的弯心直径弯曲180°后,钢筋受弯曲部位表面不得产生裂纹)
牌号        公称直径mm        弯曲试验 弯心直径
HRB335        6~25  28~50        3a    4a  
HRB400        6~25  28~50        4a    5a
HRB500        6~25  28~50        5a    7a

二、        钢筋混凝土用热轧光圆钢筋GB13013-91
表面形状        钢筋级别        强度等级代号        公称直径mm        屈服点σsMpa        抗拉强度σbMpa        伸长率δs%        冷弯d弯心直径a公称直径
                                不小于        
光圆        Ι        R235        8~20        235        370        25        180°d=a



三、        低碳钢热轧圆盘条GB/T701-1997
牌号        屈服点σsMpa        抗拉强度σbMpa        伸长率δs%        冷弯180°d弯心直径a公称直径
        不小于        
Q215        215        375        27        d=0
Q235        235        410        23        d=0.5a

四、        冷轧扭钢筋JG3046-1999
表一  轧扁厚度、节距
类型        标志直径d        轧扁厚度T不小于        节距L1不大于
Ι型        6.58101214        3.74.25.36.28.0        7595110150170
Ⅱ型        12        8.0        145

表二  公称横截面积与公称重量
类型        标志直径d        公称横截面积mm 2        公称重量,Kg/m
Ι型        6.58101214        29.545.368.393.3132.7        0.2320.356    0.5360.7331.042
Ⅱ型        12        97.8        0.768

表三  力学性能
抗拉强度σb Mpa        伸长率δ10 %        冷弯180°(弯心直径=3d)
≥580        ≥4.5        受弯曲部位表面不得产生裂纹


五、        冷轧带肋钢筋GB13788-2000
级别代号        抗拉强度σbMpa        伸长率不小于 %        冷弯180°d弯心直径a公称直径        应力松弛σ=0.7σb
        不小于        δ10        δ100                1000H不大于%        10H不大于%
CRB550        550        8        --        d=3a        --        --
CRB650        650        --        4        --        8        5
CRB800        800        --        4        --        8        5
CRB970        970        --        4        --        8        5
CRB1170        1170        --        4        --        8        5




六、        碳素结构钢GB700-88
表一  拉伸及冲击试验
牌号        等级        拉伸试验        冲击试验
                屈服点σs Mpa        抗拉强度σbMpa        伸长率δ5,%        温度℃        V型冲击功(纵向)J
                钢材厚度(直径),mm                钢材厚度(直径),mm                
                ≤16        16~40        40~60        60~100        100~150        >150                ≤16        16~40        40~60        60~100        100~150        >150                
                不小于                不小于                不小于
Q195        --        195        185        --        --        --        --        315-390        33        32        --        --        --        --        --        --
Q215        A        215        205        195        185        175        165        335-410        31        30        29        28        27        26        --        --
        B                                                                                                                20        27
Q235        A        235        225        215        205        195        185        375-460        26        25        24        23        22        21        --        --
        B                                                                                                                20        27
        C                                                                                                                0        
        D                                                                                                                -20        
Q255        A        255        245        235        225        215        205        410-510        24        23        22        21        20        19        --        --
        B                                                                                                                20        27
Q275        --        275        265        255        245        235        225        490-610        20        19        18        17        16        15        --        --

表二  冷弯试验
牌号        试样方向        冷弯试验B=2 a 180°
                钢材厚度(直径), mm
                ≤60        >60~100        >100~200
                弯心直径d
Q195        纵        0        ——        ——
        横        0.5 a                
Q215        纵        0.5 a        1.5 a        2 a
        横        a        2 a        2.5 a
Q235        纵        a        2 a        2.5 a
        横        1.5 a        2.5 a        3 a
Q255                2 a        3 a        3.5 a
Q275                3 a        4 a        4.5 a

七、        钢筋搭接焊(搭接长度)
钢筋级别        焊缝形式        搭接长度
Ⅰ        单面焊 双面焊        ≥8 d   ≥4 d
Ⅱ、Ⅲ        单面焊 双面焊        ≥8 d ≥4 d
注:d为主筋直径(mm),钢筋帮条焊中的帮条长度与钢筋搭接焊中的搭接长度相同,见上表。

八、        闪光对焊接头弯曲试验指标
钢筋级别        弯心直径        弯曲角(°)
Ⅰ级        2 d        90
Ⅱ级        4 d        90
Ⅲ级        5 d        90
Ⅳ级        7 d        90
注:1、为钢筋直径(mm)。
     2、直径大于25 mm的钢筋对焊接头,弯曲试验时弯心直径应增加1倍钢筋直径。

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