直径A Dianeter	原棒尺寸 Full size Round Bar	直径尺寸公差 Tolerance for Diameter	表面 Surface	制造方法 Method of Manufacturing
25	4000	-0.30~+0.70	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
28	4000	-0.30~+0.70	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
32	4000	-0.38~+0.95	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
36	4000	-0.38~+0.95	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
38	4000	-0.42~+1.05	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
42	4000	-0.42~+1.05	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
46	4000	-0.46~+1.15	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
50	4000	-0.50~+1.25	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
55	4000	-0.55~+1.375	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
60	4000	-0.60~+1.50	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
65	4000	-0.65~+1.625	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
70	4000	-0.70~+1.175	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
80	4000	-0.80~+2.00	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
85	4000	-0.80~+2.125	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
90	4000	-0.90~+2.25	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
95	4000	-0.95~+2.375	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
100	4000	-1.00~+2.50	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
110	4000	-1.00~+2.75	黑皮或切断面 Cut off Face with Black Appearance	热轧Hot Rolling
120	4000	0~+2.0	外周车削 Spin Lather	锻造 Forge
140	4000	0~+2.0	外周车削 Spin Lather	锻造 Forge
162	4000	0~+2.0	外周车削 Spin Lather	锻造 Forge
182	4000	0~+2.0	外周车削 Spin Lather	锻造 Forge

概述 Summarization
日本高周波钢业（株式会社）的名牌产品。除韧性，耐热裂纹性提高外，还具备了良好的加工性。是一种热作模具用钢材。在压铸模，塑料模，热锻模，热挤压模等各种领域广泛运用。对提高模具寿命作出了贡献。
KDA1S is the brand of Nippon Koshuha Steel product, KDA1S has improved toughness, heatcheck resistance, and excellent machinability. KDA1S is especially used for various molds those are diecasting, plastic, forging. Extrusion, and contribute towards the long working life of molds.