Calibrated Bright Steel Bars – new product quality! – see more 
Tolerances and deviations
Cross section tolerances (acc. to EN 10278)
| Nominal size | Accuracy class | |||||
|---|---|---|---|---|---|---|
| h6 | h7 | h8 | h9 | h10 | h11 | |
| mm | ||||||
| from 4 to 6 | -0,008 | -0,012 | -0,018 | 0,030 | -0,048 | -0,075 |
| over 6 to 10 | -0,009 | -0,015 | -0,022 | -0,036 | -0,058 | -0,090 |
| over 10 to 18 | -0,011 | -0,018 | -0,027 | -0,043 | -0,070 | -0,110 |
| over 18 to 30 | -0,013 | -0,021 | -0,033 | -0,052 | -0,084 | -0,130 |
| over 30 to 50 | -0,016 | -0,025 | -0,039 | -0,062 | -0,100 | -0,160 |
| over 50 to 80 | -0,019 | -0,030 | -0,046 | -0,074 | -0,120 | -0,190 |
| >80 to 100 | -0,022 | -0,035 | -0,054 | -0,087 | -0,140 | -0,220 |
Surface quality classes (acc. to EN 10277)
| Class 1) | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Permissible defect depth | max 0,3mm for d ≤ 15mm; max 0,02 x d for 15 < d ≤ 100mm | max 0,3mm for d ≤15mm; max 0,02 x d for 15 < d ≤ 75mm; max 1,5mm dla d > 75mm | max 0,2mm for d ≤ 20mm; max 0,01 x d for 20 < d ≤ 75mm; max 0,75mm dla d > 75mm | without cracks arising during manufacture process |
| Max amount of delivered products with higher than determined defect | 4% | 1% | 1% | 0,2% |
| Product 2) | ||||
| Round bars | + | + | + | + |
| Square bars | + | + (for d ≤ 20mm)3) |
+ | + |
| Hexagonal bars | + | + (for d ≤ 50mm)3) |
+ | + |
d = nominal diameter of a bar (round bars) or its distance across the flats (square and hexagonal bars).
1)If there were no pre-ordering agreements in the offer inquiry, Class 1 default surface is delivered.
2)+ denotes available in this class, – denotes unavailable in this class.
3)Crack detection using the rotary current method is not possible for d>20 mm or d>50 mm
Straightness deviations (acc. to EN 10278)*
* higher straightness requires agreement
| Product | Steel group | Nominal dimension [mm] |
Max deviation [mm] |
|---|---|---|---|
| Round bars | < 0,25 % C | 1,0 | |
| ≥ 0,25% C, alloy, quenched and tempered steels | 1,5 | ||
| Stainless, tool and bearing steels | 1,0 | ||
| Square and hexagonal bars | < 0,25 % C | ≤ 75 | 1,0 |
| ≥ 0,25% C, alloy steel, quenched and tempered steels | ≤ 75 | 2,0 | |
| Stainless, tool and bearing steels | ≤ 75 | 1,0 |
