... Grade: 4140 Standard: AISI, ASTM, BS, DIN, GB, JIS Dimensions: D10mm~800mm Place of Origin: Tianjin China (Mainland) Quick DetailsSteel ... Grade: 1020Standard: AISI, ASTM, BS, DIN, GB, JISDimensions: Dia:200-1000mmPlace of Origin: Guangdong China (Mainland)Brand Name: yaotengModel ... Carbon Structural Steel AISI:1020/JIS:S20C/GB:20 Dia: 100~600mm Length:2000-13000mmsae 1020 round steel bars1 ...