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Q/ASB 89-2004 Phosphorous bearing and baked hardening high-strength cold rolled sheet and strip for automobile
Mechanical properties
| grade |
MPa
Yield strength |
Rm
MPa
Tensile strength |
A50mm
% elongation |
r value |
n value |
| nominal thickness |
| not less than |
0.6~<1.0 |
1.0~<1.6 |
≥1.6 |
| 170P1 |
170-260 |
340 |
≥36 |
≥38 |
≥40 |
≥1.5 |
≥0.18 |
| 210P1 |
210-310 |
390 |
≥32 |
≥34 |
≥36 |
≥1.5 |
≥0.1 |
| 250P1 |
250-360 |
440 |
≥30 |
≥32 |
≥34 |
- |
- |
| 1.The sample of the tensile test is the crossed, When the yield point is not obvious,Rb0.2 should be measured.Otherwise the yield point should be eliminated.
2.R，n should be used to symbol 170 P1.r90、n90 should be used to symbol 210Pe.When the thickness is more than or equal to 1.6mm,r-value can be reduced 0.2.When the thickness is more than or equal to 2mm,r-value cannot be guaranteed.
3.r=（r90+2r45+r0）/4;n=（n90+2n45+n0）/4
r is equal to（r90+2r45+r0）/4;n is equal to（n90+2n45+n0）/4 |
Mechanical properties
| grade |
Rel
MPa
Yield strength |
Rm
MPa
Tensile strength |
A80mm
%
elongation |
r value |
n value |
MPa
Baked hardness value
(BH value) |
| not less than |
| 180P2(P340)(06AIP) |
180-280 |
340 |
30 |
- |
- |
- |
| 220P2(P380)(08AIP) |
220-320 |
380 |
28 |
- |
- |
- |
| 260P2(P440)(10AIP) |
260-360 |
440 |
26 |
- |
- |
- |
| 180H2(BH340) |
180-280 |
340 |
32 |
1.4 |
0.18 |
30 |
| 1. The sample to the tensile test is crossed. When the yield point is not obvious,Rp0.2 should be measured.Otherwise the yield point should be eliminated.
2. r=（r90+2r45+r0）/4;n=（n90+2n45+n0）/4
r is equal to（r90+2r45+r0）/4;n is equal to（n90+2n45+n0）/4
3. BH value will be decreased along with the time extension and the temperature increase. So the customers are recommended to be used as soon as possible. | | |
