{"id":69739,"date":"2026-05-17T17:27:53","date_gmt":"2026-05-17T17:27:53","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/en-10278\/"},"modified":"2026-05-19T15:30:50","modified_gmt":"2026-05-19T15:30:50","slug":"en-10278","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/en-10278\/","title":{"rendered":"EN 10278"},"content":{"rendered":"

Scope<\/h2>\n

This European standard specifies the technical requirements for steel bars with a finished (bright) surface. The specification applies to products manufactured by cold drawing, turning, or grinding, supplied exclusively in fixed or specified lengths. The standard does not cover cold-rolled products, nor bars cut from sheet metal or strip.<\/p>\n

Tolerances for finished bars<\/h3>\n\n\n\n\n\n\n\n\n\n
Surface finish condition<\/td>\nTolerance class according to ISO 286-2<\/td>\n<\/tr>\n
<\/td>\nh6<\/b><\/td>\nh7<\/b><\/td>\nh8<\/b><\/td>\nh9<\/b><\/td>\nh10<\/b><\/td>\nh11<\/b><\/td>\nh12<\/b><\/td>\n<\/tr>\n
Drawn<\/td>\n <\/td>\n <\/td>\n <\/td>\nR<\/td>\nR<\/td>\nR, S, H<\/td>\nR, S, H<\/td>\n<\/tr>\n
Turned<\/td>\n <\/td>\n <\/td>\n <\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\n<\/tr>\n
Polished<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\n<\/tr>\n
Ground<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\nR<\/td>\n<\/tr>\n
R: round bar, S: square bar, H: hexagonal bar<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tolerance classes<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Nominal sizes, mm<\/td>\nTolerance class according to ISO 286-2 \u00b9<\/td>\n<\/tr>\n
h6<\/b><\/td>\nh7<\/b><\/td>\nh8<\/b><\/td>\nh9<\/b><\/td>\nh10<\/b><\/td>\nh11<\/b><\/td>\nh12<\/b><\/td>\n<\/tr>\n
>1 to \u22643<\/td>\n0.006<\/td>\n0.010<\/td>\n0.014<\/td>\n0.025<\/td>\n0.040<\/td>\n0.060<\/td>\n0.100<\/td>\n<\/tr>\n
>3 to \u22646<\/td>\n0.008<\/td>\n0.012<\/td>\n0.018<\/td>\n0.030<\/td>\n0.048<\/td>\n0.075<\/td>\n0.120<\/td>\n<\/tr>\n
>6 to \u226410<\/td>\n0.009<\/td>\n0.015<\/td>\n0.022<\/td>\n0.036<\/td>\n0.058<\/td>\n0.090<\/td>\n0.150<\/td>\n<\/tr>\n
>10 to \u226418<\/td>\n0.011<\/td>\n0.018<\/td>\n0.027<\/td>\n0.043<\/td>\n0.070<\/td>\n0.110<\/td>\n0.180<\/td>\n<\/tr>\n
>18 to \u226430<\/td>\n0.013<\/td>\n0.021<\/td>\n0.033<\/td>\n0.052<\/td>\n0.084<\/td>\n0.130<\/td>\n0.210<\/td>\n<\/tr>\n
>30 to \u226450<\/td>\n0.016<\/td>\n0.025<\/td>\n0.039<\/td>\n0.062<\/td>\n0.100<\/td>\n0.160<\/td>\n0.250<\/td>\n<\/tr>\n
>50 to \u226480<\/td>\n0.019<\/td>\n0.030<\/td>\n0.046<\/td>\n0.074<\/td>\n0.120<\/td>\n0.190<\/td>\n0.300<\/td>\n<\/tr>\n
>80 to \u2264120<\/td>\n0.022<\/td>\n0.035<\/td>\n0.054<\/td>\n0.087<\/td>\n0.140<\/td>\n0.220<\/td>\n0.350<\/td>\n<\/tr>\n
>120 to \u2264180<\/td>\n0.025<\/td>\n0.040<\/td>\n0.063<\/td>\n0.100<\/td>\n0.160<\/td>\n0.250<\/td>\n0.400<\/td>\n<\/tr>\n
>180 to \u2264200<\/td>\n0.029<\/td>\n0.046<\/td>\n0.072<\/td>\n0.115<\/td>\n0.185<\/td>\n0.290<\/td>\n0.460<\/td>\n<\/tr>\n
\u00b9 The values indicated are negative deviations from the nominal size. Example for \u00d820 mm (h9): 20.000 mm \u2013 0.052 mm = 19.948 mm.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Limit dimensions for drawn flat bars<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Width, mm<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
\u226418<\/td>\n+0<\/td>\n\u20130.11<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>18 \u226430<\/td>\n+0<\/td>\n\u20130.13<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>30 \u226450<\/td>\n+0<\/td>\n\u20130.16<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>50 \u226480<\/td>\n+0<\/td>\n\u20130.19<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>80 \u2264100<\/td>\n+0<\/td>\n\u20130.22<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>100 \u2264150<\/td>\n+0.50<\/td>\n\u20130.50<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>150 \u2264200<\/td>\n+1.00<\/td>\n\u20131.00<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>200 \u2264300<\/td>\n+2.00<\/td>\n\u20132.00<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>300 \u2264400<\/td>\n+2.50<\/td>\n\u20132.50<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
Thickness, mm<\/b><\/td>\nLimit dimension, mm \u00b9 \u00b2<\/b><\/td>\n<\/tr>\n
>3 \u22646<\/td>\n\u20130.075<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>6 \u226410<\/td>\n\u20130.090<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>10 \u226418<\/td>\n\u20130.11<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>18 \u226430<\/td>\n\u20130.13<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>30 \u226450<\/td>\n\u20130.16<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>50 \u226460<\/td>\n\u20130.19<\/td>\nh11<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>60 \u226480<\/td>\n\u20130.30<\/td>\nh12<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
>80 \u2264100<\/td>\n\u20130.35<\/td>\nh12<\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
\n
    \n
  • The upper limit of +0 applies to all limit dimensions.<\/li>\n
  • Limit values are valid for low-carbon steels (C \u2264 0.20%) and free-cutting steels. For other steel grades, tolerances are increased by 50%.<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Length types and limit dimensions<\/h3>\n\n\n\n\n\n\n
    Length types<\/td>\nLength, mm<\/td>\nLength limit dimensions, mm<\/td>\nSpecified in order<\/td>\n<\/tr>\n
    Manufacturing length<\/td>\n3000\u20139000\u00b9<\/td>\n <\/td>\nLength \u00b9<\/td>\n<\/tr>\n
    Bearing length<\/td>\n3000\u00b9 or 6000\u00b9<\/td>\n <\/td>\nE.g. Bearing 6000<\/td>\n<\/tr>\n
    Exact length<\/td>\n\u22649000<\/td>\nBy agreement, min \u00b1 5<\/td>\nLength and limit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u00b9 Presence of non-standard length bars in a batch (in bundles) is allowed:<\/p>\n

      \n
    • For cross-sections \u2264 25 mm: up to 5% of bars having at least 2\/3 of the nominal length.<\/li>\n
    • For cross-sections > 25 mm: up to 10% of bars having at least 2\/3 of the nominal length.<\/li>\n<\/ul>\n

      Supply without short-length bars is possible upon prior agreement with EV Group China.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[114],"class_list":["post-69739","wiki","type-wiki","status-publish","hentry","wiki_category-en"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69739","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69739\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69739"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}