EI72 (30H13N7S2)
Classification
Chemical composition
Standard | Fe, % | Si, % | Mn, % | Cr, % | Ti, % | Ni, % | V, % | P, % | C, % | S, % | Mo, % | W, % |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Standard | Fe, % | Si, % | Mn, % | Cr, % | Ti, % | Ni, % | V, % | P, % | C, % | S, % | Mo, % | W, % |
GOST 5632-14 | 73.285–79.75 | 2–3 | < 0.8 | 12–14 | < 0.2 | 6–7.5 | < 0.2 | < 0.025 | 0.25–0.34 | < 0.25 | < 0.2 | < 0.2 |
Information on suppliers
Properties
Property |
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Property |
Performance characteristics Scale formation temperature: 950 ° C |
According to GOST 5949 Note. The norms of mechanical properties apply to samples taken from steel with a diameter or thickness of up to 60 mm. |
According to GOST 5949 Note. The norms of mechanical properties apply to samples taken from steel with a diameter or thickness of up to 60 mm. |
relative narrowing by 5abs.% and impact strength by 4.9 J / cm2 at a rate of less than 78.4 J / cm2 and by 9.8 J / cm2 at a rate of 78.4 J / cm2 or more. |
For steel with a diameter or thickness of st. 100 to 150mm, a reduction in elongation of 3abs.% Is allowed, |
a relative narrowing of 10 abs.% and impact strength of 9.8 J / cm2 at a rate of less than 78.4 J / cm2 and at 14.7 J / cm2 at a rate of 78.4 J / cm2 or more. |
Quenching 1040-1060 ° С in air Annealing 860 - 880 ° С, cooling to 700 ° С 2 hours in air, then in an oven |
Annealing 660 - 680 ° С, 30 minutes, air cooling Quenching 790-810 ° С in oil |
GOST 5949 Yield strength:> 785 MPa Tensile strength:> 1180 MPa Elongation:> 8% Impact strength KCU at 20 ° C:> 20 J / cm2 Relative narrowing:> 25% |
By agreement M1 (tests at elevated temperature) Note By agreement |
Calculated Properties Density: 7.7 g / cm3 |
Note Heat-resistant steel Martensitic steel Stable in sulfur-containing environments |
Standards
Standard | Description |
---|---|
Standard | Description |
GOST 5632-14 | |
GOST 5632-72 | |
GOST 5949-18 |