SFVQ1A
SFVQ1A is a material in the category Quenched and tempered steels. Its recorded composition includes C ≤ 0.25%, Si ≤ 0.4%, Mn 1.2–1.5%, Ni 0.4–1% and Mo 0.45–0.6%. We list one designation recorded for this grade, in the standard KS. Recorded mechanical properties include Rm 550–730 N/mm², Re 345 N/mm², A 16% and Z 38%; these figures vary with the delivery condition and dimension.
- Category Quenched and tempered steels · 133 grades
- Designations 2
If you came for one of these
The most-used names for this grade.- KSSFVQ1AThis grade’s own name
About Quenched and tempered steels
Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
2 designations · 2 standards · nothing hidden- SFVQ1AThis grade’s own name
- SFVQ1AThis grade’s own name
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
9 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
≤ 0.25 | |
≤ 0.4 | |
1.2–1.5 | |
≤ 0.03 | |
≤ 0.03 | |
≤ 0.25 | |
0.45–0.6 | |
0.4–1 | |
≤ 0.05 |
The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.
| Element | As publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | max 0.25 | — | 0.250 | Max |
| Si | max 0.4 | — | 0.400 | Max |
| P | max 0.03 | — | 0.030 | Max |
| S | max 0.03 | — | 0.030 | Max |
| V | max 0.05 | — | 0.050 | Max |
| Cr | max 0.25 | — | 0.250 | Max |
| Mn | 1.2 - 1.5 | 1.200 | 1.500 | Range |
| Ni | 0.4 - 1 | 0.400 | 1.000 | Range |
| Mo | 0.45 - 0.6 | 0.450 | 0.600 | Range |
The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.
Predicted transformation temperatures
computed from composition · °CThese four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.
Physical & mechanical properties
An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.
Looking for this grade under another name?
Search the catalogue by designation, material number or composition — every name on this page is itself a way in.