优质结构钢冷拉钢材交货状态的力学性能(摘自：GB/T 3078-2008)
优质结构钢冷拉钢材交货状态的力学性能(摘自：GB/T 3078-2008)
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优质结构钢冷拉钢材交货状态的力学性能(GB/T 3078—2008) |
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|---|---|---|---|---|---|---|---|---|---|
|
序
号 |
牌
号 |
冷 拉 钢 |
退 火 钢 |
||||||
|
拉伸 强度 N/mm2 |
断后 伸长率 % |
端面 收缩率 % |
交货状态 硬度 HBW |
拉伸 强度 N/mm2 |
断后 伸长率 % |
端面 收缩率 % |
交货状态 硬度 HBW |
||
|
≥ |
≤ |
≥ |
≤ |
||||||
|
1 |
10 |
440 |
8 |
50 |
229 |
295 |
26 |
55 |
179 |
|
2 |
15 |
470 |
8 |
45 |
229 |
345 |
28 |
55 |
179 |
|
3 |
20 |
510 |
7.5 |
40 |
229 |
390 |
21 |
50 |
179 |
|
4 |
25 |
540 |
7 |
40 |
229 |
410 |
19 |
50 |
179 |
|
5 |
30 |
560 |
7 |
35 |
229 |
440 |
17 |
45 |
179 |
|
6 |
35 |
590 |
6.5 |
35 |
241 |
470 |
15 |
45 |
187 |
|
7 |
40 |
610 |
6 |
35 |
241 |
510 |
14 |
40 |
207 |
|
8 |
45 |
635 |
6 |
30 |
255 |
540 |
13 |
40 |
229 |
|
9 |
50 |
655 |
6 |
30 |
255 |
560 |
12 |
40 |
229 |
|
10 |
55 |
|
|
|
269 |
|
|
|
241 |
|
11 |
60 |
|
|
|
269 |
|
|
|
241 |
|
12 |
65 |
|
|
|
— |
|
|
|
255 |
|
13 |
15Mn |
490 |
7.5 |
40 |
207 |
390 |
21 |
50 |
163 |
|
14 |
20Mn |
|
|
|
229 |
|
|
|
187 |
|
15 |
25Mn |
|
|
|
241 |
|
|
|
197 |
|
16 |
30Mn |
|
|
|
241 |
|
|
|
197 |
|
17 |
35Mn |
|
|
|
255 |
|
|
|
207 |
|
18 |
40Mn |
|
|
|
269 |
|
|
|
217 |
|
19 |
45Mn |
|
|
|
269 |
|
|
|
229 |
|
20 |
50Mn |
685 |
5.5 |
30 |
269 |
590 |
10 |
35 |
229 |
|
21 |
60Mn |
|
|
|
— |
|
|
|
255 |
|
22 |
65Mn |
|
|
|
— |
|
|
|
269 |
|
23 |
20Mn2 |
|
|
|
241 |
|
|
|
197 |
|
24 |
35Mn2 |
|
|
|
255 |
|
|
|
207 |
|
25 |
40Mn2 |
|
|
|
269 |
|
|
|
217 |
|
26 |
45Mn2 |
|
|
|
269 |
|
|
|
229 |
|
27 |
50Mn2 |
735 |
5 |
25 |
285 |
635 |
9 |
30 |
229 |
|
28 |
27SiMn |
|
|
|
255 |
|
|
|
217 |
|
29 |
35SiMn |
|
|
|
269 |
|
|
|
229 |
|
30 |
42SiMn |
|
|
|
— |
|
|
|
241 |
|
31 |
20MnV |
|
|
|
229 |
|
|
|
187 |
|
32 |
40B |
|
|
|
241 |
|
|
|
207 |
|
33 |
45B |
|
|
|
255 |
|
|
|
229 |
|
34 |
50B |
|
|
|
255 |
|
|
|
229 |
|
35 |
40MnB |
|
|
|
269 |
|
|
|
217 |
|
36 |
45MnB |
|
|
|
269 |
|
|
|
229 |
|
37 |
40MnVB |
|
|
|
269 |
|
|
|
217 |
|
38 |
20SiMnVB |
|
|
|
269 |
|
|
|
217 |
|
39 |
20CrV |
|
|
|
255 |
|
|
|
217 |
|
40 |
40CrVA |
|
|
|
269 |
|
|
|
229 |
|
41 |
45CrVA |
|
|
|
302 |
|
|
|
255 |
|
42 |
38CrSi |
|
|
|
269 |
|
|
|
255 |
|
43 |
20CrMnSiA |
|
|
|
255 |
|
|
|
217 |
|
44 |
25CrMnSiA |
|
|
|
269 |
|
|
|
229 |
|
45 |
30CrMnSiA |
|
|
|
269 |
|
|
|
229 |
|
46 |
35CrMnSiA |
|
|
|
285 |
|
|
|
241 |
|
47 |
20CrMnTi |
|
|
|
255 |
|
|
|
207 |
|
48 |
15CrMo |
|
|
|
229 |
|
|
|
187 |
|
49 |
20CrMo |
|
|
|
241 |
|
|
|
197 |
|
50 |
30CrMo |
|
|
|
269 |
|
|
|
229 |
|
51 |
35CrMo |
|
|
|
269 |
|
|
|
241 |
|
52 |
42CrMo |
|
|
|
285 |
|
|
|
255 |
|
53 |
20CrMnMo |
|
|
|
269 |
|
|
|
229 |
|
54 |
40CrMnMo |
|
|
|
269 |
|
|
|
241 |
|
55 |
35CrMoVA |
|
|
|
285 |
|
|
|
255 |
|
56 |
38CrMoAlA |
|
|
|
269 |
|
|
|
229 |
|
57 |
15CrA |
|
|
|
229 |
|
|
|
179 |
|
58 |
20Cr |
|
|
|
229 |
|
|
|
179 |
|
59 |
30Cr |
|
|
|
241 |
|
|
|
187 |
|
60 |
35Cr |
|
|
|
269 |
|
|
|
217 |
|
61 |
40Cr |
|
|
|
269 |
|
|
|
217 |
|
62 |
45Cr |
|
|
|
269 |
|
|
|
229 |
|
63 |
20CrNi |
|
|
|
255 |
|
|
|
207 |
|
64 |
40CrNi |
|
|
|
— |
|
|
|
255 |
|
65 |
45CrNi |
|
|
|
— |
|
|
|
269 |
|
66 |
12CrNi2A |
|
|
|
269 |
|
|
|
217 |
|
67 |
12CrNi3A |
|
|
|
269 |
|
|
|
229 |
|
68 |
20CrNi3A |
|
|
|
— |
|
|
|
241 |
|
69 |
30CrNi3(A) |
|
|
|
— |
|
|
|
255 |
|
70 |
37CrNi3A |
|
|
|
— |
|
|
|
269 |
|
71 |
12Cr2Ni4A |
|
|
|
— |
|
|
|
255 |
|
72 |
20Cr2Ni4A |
|
|
|
— |
|
|
|
269 |
|
73 |
40CrNiMoA |
|
|
|
— |
|
|
|
269 |
|
74 |
45CrNiMoVA |
|
|
|
— |
|
|
|
269 |
|
75 |
18Cr2Ni4WA |
|
|
|
— |
|
|
|
269 |
|
76 |
25Cr2Ni4WA |
|
|
|
— |
|
|
|
269 |
|
注：1．本标准适用于优质碳素结构钢和合金结构钢（圆钢、方和六角形钢）冷拉钢棒。 2．钢材以冷拉或热处理(退火、光亮退火、正火、高温回火、正火后回火)状态交货。 3．退火钢的硬度对于仅有硬度值而无其他力学性能的钢是指退火、高温回火或正火后回火状态的硬度。 4．冷拉钢材的尺寸、外形及允许偏差应符合GB/T 905的规定。磨光钢材的尺寸、外形及允许偏差应符合GB/T 3207(银亮钢)的规定。 5．冷拉钢材的尺寸精度高、表面质量高、力学性能高，因而其在机械，国防、冶金、化工、交通运输等工业部门得到广泛的应用。 |
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