55Si2MnB
55Si2MnB is a grade designated under GB. Its recorded composition includes C 0.52–0.6%, Si 1.5–2%, Cr ≤ 0.35%, Mn 0.6–0.9% and Ni ≤ 0.35%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm ≥ 1274 N/mm², Re ≥ 1176 N/mm², A ≥ 6% and HB 321.
- Designations 1
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 |
|---|---|
0.52–0.6 | |
1.5–2 | |
0.6–0.9 | |
≤ 0.035 | |
≤ 0.035 | |
≤ 0.35 | |
≤ 0.35 | |
≤ 0.25 | |
0.0005–0.004 |
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 |
|---|---|---|---|---|
| B | 0.0005-0.004 | 0.001 | 0.004 | Range |
| C | 0.52-0.6 | 0.520 | 0.600 | Range |
| Si | 1.5-2 | 1.500 | 2.000 | Range |
| P | ≤0.035 | — | 0.035 | Max |
| S | ≤0.035 | — | 0.035 | Max |
| Cr | ≤0.35 | — | 0.350 | Max |
| Mn | 0.6-0.9 | 0.600 | 0.900 | Range |
| Ni | ≤0.35 | — | 0.350 | Max |
| Cu | ≤0.25 | — | 0.250 | Max |
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
Not enough recorded composition to predict a transformation temperature for this grade — missing: Mo.
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.
Properties by condition
0 conditions · 0 values5 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition.
Heat treatment
Supply condition
- Quenching and TemperingWire and As-rolled
Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.
Source: www.caishuku.com
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