EN 10278, Stainless Bright Bar Tolerance, Dimensions

EN 10278, Stainless Bright Bar Tolerance, Dimensions
STEELMAX Steel Story

EN 10278 은 허용 공차 규정입니다.
bright bar 에 대한 칫수와 공차 규정으로

공차 규정은 ASTM, DIN EN, JIS, KS 등,
Standard 규정에 각각 있습니다.

EN 10028 의 규정 중 표면에 대한 다듬질의
스테인레스 환봉 (EN 10088-3) 에 대한 규정은 아래와 같습니다.

예를 들어 Stainless steel, DIN-EN 1.4441, 316LVM, ISO 5832-1,
ASTM F138 강재의 경우, Tolerance EN 10278 h9 가, 적용되기도 합니다.

Tolerance class to ISO 286-2
Finished condition	h6	h7	h8	h9	h10	h11	h12
Drawn				R	R	R, S, H	R, S, H
Turned				R	R	R	R
Ground	R	R	R	R	R	R	R
Polished	R	R	R	R	R	R	R
R = round, S = square, H = Hexagon

Tolerance class to ISO 286-2
mm	h6	h7	h8	h9	h10	h11	h12
＞1 to≤3	0.006	0.010	0.014	0.025	0.040	0.060	0.100
＞3 to≤6	0.008	0.012	0.018	0.03	0.048	0.075	0.120
＞6 to≤10	0.009	0.015	0.022	0.036	0.058	0.090	0.150
＞10 to≤18	0.011	0.018	0.027	0.043	0.070	0.110	0.180
＞18 to≤30	0.013	0.021	0.033	0.052	0.084	0.130	0.210
＞30 to≤50	0.016	0.025	0.039	0.062	0.100	0.160	0.250
＞50 to≤80	0.019	0.030	0.046	0.074	0.120	0.190	0.300
＞80 to≤120	0.022	0.035	0.054	0.087	0.140	0.220	0.350
＞120 to≤180	0.025	0.040	0.063	0.100	0.160	0.250	0.400
＞180 to≤200	0.029	0.046	0.072	0.115	0.185	0.290	0.460
For example a 20 mm nominal diameter having a tolerance class h9 is 20 mm+0, -0.052 mm or 19.948/20. mm

※ EN 10278 : Standard specification for dimensions and
tolerance of bright steel products

※ Bright Steel : Steel which has had the surface condition improved by drawing, peeling,
turning or grinding the steel finish to produce a “bright” finish with a tighter tolerance
and an improved surface without scale

Cold drawing (Symbol : +C) : increases the yield and tensile strengths,
often eliminating further costly thermal treatments.

Turning (Symbol : +SH) : gets rid of surface imperfections
Grinding (Symbol : +SL) : narrows the original size tolerance range
Polishing(Symbol : +PL) : improves surface finish.