GBT 16270 Q690C quenched and tempered steel plates are high strength welded structural steel. Q represents yield strength, 690 represents yield strength value C indicates the impact temperature of Q690 steel. The impact of grade C steel plate is 0 °C.
GBT 16270 Q690C quenched and tempered steel plates chemical composition:
| Steel grade | C% max | Si% max | Mn% max | P% max | S% max | Cu% max | Cr% max | Ni% max | Mo % max | B % max | V % max | Nb% max | Ti % max |
| Q690C | 0.2 | 0.80 | 1.8 | 0.025 | 0.015 | 0.5 | 1.5 | 2 | 0.70 | 0.005 | 0.12 | 0.06 | 0.05 |
GBT 16270 Q690C quenched and tempered steel plates mechanical property:
| Steel grade | Yield strength Mpa min | Tensile strength Mpa min | elongation % | Energy and temperature | |||||||
| Min | 0 | -20 | -40 | -60 | |||||||
| t≤50 | 50-100 | 100-150 | t≤50 | 50-100 | 100-150 | J | J | J | J | ||
| Q690C | 690 | 650 | 630 | 770-940 | 760-930 | 710-900 | 14 | 47 | 47 | 34 | 34 |
GBT 16270 Q690C quenched and tempered steel plates have high yield strength and tensile strength. Q690C steel plates are widely used in coal mine machinery and construction machinery. Such as hydraulic support, port crane, flatbed transporter and so on.
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