电渣型模具钢WSMP20R、 WSM718R系列
（该钢种在国内广泛应用，成分略有差异）
WSMP20R钢板与国外标准对照：舞钢HWISCO 牌号WSMP20R；中国标准GB/YB 牌号3CR2MO；美国标准AISI 牌号P20；德国标准DIN 牌号1.2311；瑞典标准ASSAB 牌号618；奥地利标准BOHLER 牌号M202； WSM718R钢板与国外标准对照：舞钢HWISCO 牌号WSM718R；中国标准GB/YB 牌号3Cr2NiMnMO；美国标准AISI 牌号P20+Ni；德国标准DIN 牌号1.2738；瑞典标准ASSAB 牌号718；奥地利标准BOHLER 牌号M202；
电渣型模具钢WSMP20R、 WSM718R系列,采用精炼、VD真空及电渣重熔处理，钢板极高的纯净度，组织致密，适用于制造易抛光至镜面效果，抗腐蚀性及抛光性要求极高的模具，属高级优质模具钢板。适用于制造大中型长寿命热塑性塑胶注塑模具、挤压模具、吹塑模具及地熔点合金（如铅、锌、铝合金）压铸模，如家用电器、电脑外壳及冰箱外壳等光洁度要求较高的塑料模具。对于H质量等级的模具钢板，由于高硬度，可用于塑胶模具中之滑动块、成型工具、压缩-制动模（弯板机模）及零件等。钢板硬化交货无需热处理，可直接进行模具加工，缩短模具制造周期，采用精真空脱气、电渣重熔处理，确保钢质纯净。钢板硫磷含量控制低，组织致密均匀，硬度分布均匀，镜面抛光性能出色，由于WSM718R钢中增加1.0%左右的镍，因此钢板有极佳的淬透性，具有良好的抛光性能、光蚀刻、电火花蚀刻、耐磨性及机械加工等特性。H型钢板硬度较高，因此抛光性能极佳。WSMP20R、 WSM718R
规格有：20-410*1500-3000*2000-9000mm。
技术要求：（若特殊要求约定，执行WYJ企业标准） 化学成分（熔炼成分）含有 C Si Mn Cr Mo Ni Me(详细内容来电咨询)。交货状态：预调质、特殊热处理状态交货。出厂硬度：WSMP20R为280-340HB；WSM718R/M级为280-340HB；WSM718R/H级为320-370HB。内在质量：逐张探伤，探伤执行GB6402 国标 合格I级。检验部位在钢板表面头、中、尾五点硬度，以五点平均值作为硬度评定依据。WSMP20R、 WSM718R
物理性能：临界点Ac1:770℃ Ac3:825℃ Arl:640℃ Ar3:755℃
比热系数：0.46KJ/Kg.K。 传导及膨胀系数 略：电询。
钢板实物质量：钢板杂质含量控制低，钢质纯净，杂质含量可达0.009-0.012%P,0.001-0.003%S,{N}：45-60PPm,{H}:1.5PPm,{O}:13-18PPm。
钢板内在组织致密，低倍缺陷组织控制低，钢板100%通过GB6402的探伤检验，探伤最大厚度为410mm，钢板低倍组织无裂纹、气孔等危害缺陷，其疏松和偏析级别≤1.0级，WSMP20R、 WSM718R
钢板硬度控制均匀，同板差小，典型钢板表面硬度检验，表略：全厚度硬度检验，表略：钢板杂质含量控制低，各类非金属夹杂物控制在1.0级以下，表略：钢板组织控制均匀，表面、1/4处及1/2处组织保持均匀一致，表略：WSMP20R、 WSM718R。
通过用户使用验证，反映良好，WSM718R钢板厚220mm的抛光效果看，式样镜面表现出光洁如镜，无麻点，橘子纹等缺陷，在式样前放置鲜花，可明显看出形成清晰的影像。WSMP20R、 WSM718R
Electroslag mold steel WSMP20R, WSM718R Series
(The steel widely used in China, a slightly different composition)
WSMP20R control plate and foreign standards: Wugang HWISCO grade WSMP20R; Chinese standard GB / YB grade 3CR2MO; U.S. standard AISI grade P20; German standard DIN grade 1.2311; Swedish Standard Grade ASSAB 618; Austrian standard BOHLER grade M202; WSM718R plate and foreign standards control: Wugang HWISCO grade WSM718R; Chinese standard GB / YB grade 3Cr2NiMnMO; U.S. standard AISI grade P20 + Ni; German standard DIN 1.2738 grade; Swedish standard ASSAB grade 718; Austrian standard BOHLER grade M202;
Electroslag mold steel WSMP20R, WSM718R series of refining, VD vacuum and electroslag remelting, a high purity steel, compact, easy to apply polish to create a mirror effect, anti-corrosive and highly demanding polishing mold, is a high quality mold steel. For the manufacture of medium to large long-life thermoplastic injection molding, extrusion mold, blow mold and to the melting point alloys (such as lead, zinc, aluminum) die-casting mold, such as household appliances, computer casings and refrigerator shell, and so require a higher finish plastic mold. The quality level of the mold plate H, as high hardness, can be used for the plastic mold of the sliding block, forming tools, compressed - braking mode (bending machine model), and spare parts. Hardened steel without heat treatment delivery, can be directly mold, mold manufacturing to shorten cycle, using fine vacuum degassing, electroslag remelting, to ensure that pure steel. Parathion content control plate is low, dense uniform hardness distribution, mirror-polished performance well, because WSM718R steel increased by 1.0% of the nickel, so steel have excellent hardenability, good polishing performance, light etching, EDM etching, abrasion resistance and mechanical processing properties. H-steel hardness, excellent performance so polished. WSMP20R, WSM718R
Specifications :20-410 * 1500-3000 * 2000-9000mm.
Technical Requirements: (special requirements, if agreed, the implementation of WYJ enterprise standard) chemical composition (melting components) contain C Si Mn Cr Mo Ni Me (inquire for details.) Delivery Status: pre-conditioning, special heat treatment delivery. Factory hardness: WSMP20R to 280-340HB; WSM718R / M level for the 280-340HB; WSM718R / H-class for the 320-370HB. Internal quality: detection by one, testing the implementation of the national standard GB6402 qualified I level. The surface of the first test site in the plate, in the end of five hardness, hardness of a five-point average as a basis for evaluation. WSMP20R, WSM718R
Physical properties: the critical point Ac1: 770 ℃ Ac3: 825 ℃ Arl: 640 ℃ Ar3: 755 ℃
Specific heat coefficient: 0.46KJ/Kg.K. Conductivity and thermal expansion coefficient slightly: Electricity consultation.
The physical quality of steel: steel with low impurity content control, steel purity and impurity content of up to 0.009-0.012% P ,0.001-0 .003% S, {N} :45-60PPm, {H}: 1.5PPm, {O}: 13 -18PPm.
Steel inner dense, low-magnification defects low organizational control, 100% steel inspection by GB6402 of testing, testing a maximum thickness of 410mm, steel low magnification free of cracks, holes and other hazards defects, its porosity and segregation levels ≤ 1.0 级, WSMP20R, WSM718R
Steel Hardness Control uniform, with the board difference is small, typically steel surface hardness test, the table slightly: Full thickness hardness test, the table slightly: the control plate with low impurity content, various types of non-metallic inclusions in 1.0 below, the table slightly: Steel Organization control of uniform surface, 1 / 4 and 1 / 2 organizations to maintain uniform sheet slightly: WSMP20R, WSM718R.
Through user authentication, reflecting the good, WSM718R 220mm thick steel polishing effect, the pattern shows mirror smooth as a mirror, no pitting, orange grain and other defects before placing flowers in the pattern, it is clear that the formation of clear images. WSMP20R, WSM718R
